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strftime.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1985-2006 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * strftime implementation
 */

#define _def_map_ast    1

#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide strftime
#else
#define strftime  ______strftime
#endif

#include <ast.h>
#include <tm.h>

#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide strftime
#else
#undef      strftime
#endif

#undef      _def_map_ast

#include <ast_map.h>

#undef      _lib_strftime     /* we can pass X/Open */

#if _lib_strftime

NoN(strftime)

#else

#if defined(__EXPORT__)
#define extern    __EXPORT__
#endif

extern size_t
strftime(char* buf, size_t len, const char* format, const struct tm* tm)
{
      register char*    s;
      time_t            t;
      Tm_t        tl;

      memset(&tl, 0, sizeof(tl));

      /*
       * nl_langinfo() may call strftime() with bogus tm except for
       * one value -- what a way to go
       */

      if (tm->tm_sec < 0 || tm->tm_sec > 60 ||
          tm->tm_min < 0 || tm->tm_min > 59 ||
          tm->tm_hour < 0 || tm->tm_hour > 23 ||
          tm->tm_wday < 0 || tm->tm_wday > 6 ||
          tm->tm_mday < 1 || tm->tm_mday > 31 ||
          tm->tm_mon < 0 || tm->tm_mon > 11 ||
          tm->tm_year < 0 || tm->tm_year > (2138 - 1900))
      {
            if (tm->tm_sec >= 0 && tm->tm_sec <= 60)
                  tl.tm_sec = tm->tm_sec;
            if (tm->tm_min >= 0 && tm->tm_min <= 59)
                  tl.tm_min = tm->tm_min;
            if (tm->tm_hour >= 0 && tm->tm_hour <= 23)
                  tl.tm_hour = tm->tm_hour;
            if (tm->tm_wday >= 0 && tm->tm_wday <= 6)
                  tl.tm_wday = tm->tm_wday;
            if (tm->tm_mday >= 0 && tm->tm_mday <= 31)
                  tl.tm_mday = tm->tm_mday;
            if (tm->tm_mon >= 0 && tm->tm_mon <= 11)
                  tl.tm_mon = tm->tm_mon;
            if (tm->tm_year >= 0 && tm->tm_year <= (2138 - 1900))
                  tl.tm_year = tm->tm_year;
      }
      else
      {
            tl.tm_sec = tm->tm_sec;
            tl.tm_min = tm->tm_min;
            tl.tm_hour = tm->tm_hour;
            tl.tm_mday = tm->tm_mday;
            tl.tm_mon = tm->tm_mon;
            tl.tm_year = tm->tm_year;
            tl.tm_wday = tm->tm_wday;
            tl.tm_yday = tm->tm_yday;
            tl.tm_isdst = tm->tm_isdst;
      }
      t = tmtime(&tl, TM_LOCALZONE);
      if (!(s = tmfmt(buf, len, format, &t)))
            return 0;
      return s - buf;
}

#endif

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