Vlv2TbltDevicePkg: Fix IA32 boot timeouts

[mirror_edk2.git] / StdLib / LibC / Locale / wcsftime.c

/*   $NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 tnozaki Exp $  */\r
/*-\r
 * Copyright (c) 2002 Tim J. Robbins\r
 * All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 */\r
#include  <LibConfig.h>\r
#include  <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
#if 0\r
__FBSDID("$FreeBSD: src/lib/libc/locale/wcsftime.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");\r
#else\r
__RCSID("$NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 tnozaki Exp $");\r
#endif\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <errno.h>\r
#include <limits.h>\r
#include <stdlib.h>\r
#include <time.h>\r
#include <wchar.h>\r
#include  <machine/int_limits.h>\r
\r
/*\r
 * Convert date and time to a wide-character string.\r
 *\r
 * This is the wide-character counterpart of strftime(). So that we do not\r
 * have to duplicate the code of strftime(), we convert the format string to\r
 * multibyte, call strftime(), then convert the result back into wide\r
 * characters.\r
 *\r
 * This technique loses in the presence of stateful multibyte encoding if any\r
 * of the conversions in the format string change conversion state. When\r
 * stateful encoding is implemented, we will need to reset the state between\r
 * format specifications in the format string.\r
 */\r
size_t\r
wcsftime(wchar_t *wcs, size_t maxsize,\r
    const wchar_t *format, const struct tm *timeptr)\r
{\r
  char *dst, *dstp, *sformat;\r
  size_t n, sflen;\r
  int sverrno;\r
\r
  sformat = dst = NULL;\r
\r
  /*\r
   * Convert the supplied format string to a multibyte representation\r
   * for strftime(), which only handles single-byte characters.\r
   */\r
  sflen = wcstombs(NULL, format, 0);\r
  if (sflen == (size_t)-1)\r
    goto error;\r
  if ((sformat = malloc(sflen + 1)) == NULL)\r
    goto error;\r
  wcstombs(sformat, format, sflen + 1);\r
\r
  /*\r
   * Allocate memory for longest multibyte sequence that will fit\r
   * into the caller's buffer and call strftime() to fill it.\r
   * Then, copy and convert the result back into wide characters in\r
   * the caller's buffer.\r
   */\r
  if (SIZE_T_MAX / MB_CUR_MAX <= maxsize) {\r
    /* maxsize is preposturously large - avoid int. overflow. */\r
    errno = EINVAL;\r
    goto error;\r
  }\r
  dst = malloc(maxsize * MB_CUR_MAX);\r
  if (dst == NULL)\r
    goto error;\r
  if (strftime(dst, maxsize, sformat, timeptr) == 0)\r
    goto error;\r
  dstp = dst;\r
  n = mbstowcs(wcs, dstp, maxsize);\r
  if (n == (size_t)-2 || n == (size_t)-1)\r
    goto error;\r
\r
  free(sformat);\r
  free(dst);\r
  return n;\r
\r
error:\r
  sverrno = errno;\r
  free(sformat);\r
  free(dst);\r
  errno = sverrno;\r
  return 0;\r
}\r