avoid misc. warnings

[gnulib.git] / lib / strftime.c

diff --git a/lib/strftime.c b/lib/strftime.c
index ffa51c0..fff5d38 100644 (file)
--- a/lib/strftime.c
+++ b/lib/strftime.c
@@ -1,74 +1,61 @@
-/* Copyright (C) 1991-1999, 2000, 2001, 2003, 2004, 2005, 2006 Free Software
+/* Copyright (C) 1991-1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2009 Free Software
    Foundation, Inc.
 
    NOTE: The canonical source of this file is maintained with the GNU C Library.
    Bugs can be reported to bug-glibc@prep.ai.mit.edu.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef _LIBC
-# define HAVE_MBLEN 1
-# define HAVE_MBRLEN 1
 # define HAVE_STRUCT_ERA_ENTRY 1
 # define HAVE_TM_GMTOFF 1
 # define HAVE_TM_ZONE 1
 # define HAVE_TZNAME 1
 # define HAVE_TZSET 1
-# define MULTIBYTE_IS_FORMAT_SAFE 1
 # include "../locale/localeinfo.h"
 #else
 # include <config.h>
 # if FPRINTFTIME
 #  include "fprintftime.h"
+# else
+#  include "strftime.h"
 # endif
 #endif
 
 #include <ctype.h>
-#include <sys/types.h>         /* Some systems define `time_t' here.  */
+#include <time.h>
 
-#ifdef TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# ifdef HAVE_SYS_TIME_H
-#  include <sys/time.h>
-# else
-#  include <time.h>
-# endif
-#endif
-#if HAVE_TZNAME && ! defined tzname
+#if HAVE_TZNAME && !HAVE_DECL_TZNAME
 extern char *tzname[];
 #endif
 
 /* Do multibyte processing if multibytes are supported, unless
    multibyte sequences are safe in formats.  Multibyte sequences are
    safe if they cannot contain byte sequences that look like format
-   conversion specifications.  The GNU C Library uses UTF8 multibyte
-   encoding, which is safe for formats, but strftime.c can be used
-   with other C libraries that use unsafe encodings.  */
-#define DO_MULTIBYTE (HAVE_MBLEN && HAVE_WCHAR_H && ! MULTIBYTE_IS_FORMAT_SAFE)
+   conversion specifications.  The multibyte encodings used by the
+   C library on the various platforms (UTF-8, GB2312, GBK, CP936,
+   GB18030, EUC-TW, BIG5, BIG5-HKSCS, CP950, EUC-JP, EUC-KR, CP949,
+   SHIFT_JIS, CP932, JOHAB) are safe for formats, because the byte '%'
+   cannot occur in a multibyte character except in the first byte.
+   But this does not hold for the DEC-HANYU encoding used on OSF/1.  */
+#if !defined __osf__
+# define MULTIBYTE_IS_FORMAT_SAFE 1
+#endif
+#define DO_MULTIBYTE (! MULTIBYTE_IS_FORMAT_SAFE)
 
 #if DO_MULTIBYTE
-# if HAVE_MBRLEN
-#  include <wchar.h>
-# else
-   /* Simulate mbrlen with mblen as best we can.  */
-#  define mbstate_t int
-#  define mbrlen(s, n, ps) mblen (s, n)
-#  define mbsinit(ps) (*(ps) == 0)
-# endif
+# include <wchar.h>
   static const mbstate_t mbstate_zero;
 #endif
 
@@ -97,13 +84,6 @@ extern char *tzname[];
 # define MEMCPY(d, s, n) memcpy (d, s, n)
 # define STRLEN(s) strlen (s)
 
-# ifdef _LIBC
-#  define MEMPCPY(d, s, n) __mempcpy (d, s, n)
-# else
-#  ifndef HAVE_MEMPCPY
-#   define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n)))
-#  endif
-# endif
 #endif
 
 /* Shift A right by B bits portably, by dividing A by 2**B and
@@ -144,11 +124,10 @@ extern char *tzname[];
 #endif
 
 #if !HAVE_TM_GMTOFF
-/* Portable standalone applications should supply a "time_r.h" that
+/* Portable standalone applications should supply a "time.h" that
    declares a POSIX-compliant localtime_r, for the benefit of older
    implementations that lack localtime_r or have a nonstandard one.
    See the gnulib time_r module for one way to implement this.  */
-# include "time_r.h"
 # undef __gmtime_r
 # undef __localtime_r
 # define __gmtime_r gmtime_r
@@ -181,6 +160,12 @@ extern char *tzname[];
 # define memset_zero(P, Len) (memset (P, '0', Len), (P) += (Len))
 #endif
 
+#if FPRINTFTIME
+# define advance(P, N)
+#else
+# define advance(P, N) ((P) += (N))
+#endif
+
 #define add(n, f)                                                            \
   do                                                                         \
     {                                                                        \
@@ -199,7 +184,7 @@ extern char *tzname[];
                memset_space (p, _delta);                                     \
            }                                                                 \
          f;                                                                  \
-         p += FPRINTFTIME ? 0 : _n;                                          \
+         advance (p, _n);                                                    \
        }                                                                     \
       i += _incr;                                                            \
     } while (0)