Add device abstraction code for the UEFI Console and UEFI Shell-based file systems.

[mirror_edk2.git] / StdLib / LibC / Stdio / fgetws.c

/* $NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $ */\r
\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
 * Original version ID:\r
 * FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp\r
 *\r
 */\r
#include  <LibConfig.h>\r
#include <sys/EfiCdefs.h>\r
#if defined(LIB_SCCS) && !defined(lint)\r
__RCSID("$NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $");\r
#endif\r
\r
#include <assert.h>\r
#include <errno.h>\r
#include <stdio.h>\r
#include <wchar.h>\r
#include "reentrant.h"\r
#include "local.h"\r
\r
wchar_t *\r
fgetws(\r
  wchar_t * __restrict ws,\r
  int n,\r
  FILE * __restrict fp\r
  )\r
{\r
  wchar_t *wsp;\r
  wint_t wc;\r
\r
  _DIAGASSERT(fp != NULL);\r
  _DIAGASSERT(ws != NULL);\r
\r
  FLOCKFILE(fp);\r
  _SET_ORIENTATION(fp, 1);\r
\r
  if (n <= 0) {\r
    errno = EINVAL;\r
    goto error;\r
  }\r
\r
  wsp = ws;\r
  while (n-- > 1) {\r
    wc = __fgetwc_unlock(fp);\r
    if (__sferror(fp) != 0)\r
      goto error;\r
    if (__sfeof(fp) != 0) {\r
      if (wsp == ws) {\r
        /* EOF/error, no characters read yet. */\r
        goto error;\r
      }\r
      break;\r
    }\r
    *wsp++ = (wchar_t)wc;\r
    if (wc == L'\n') {\r
      break;\r
    }\r
  }\r
\r
  *wsp++ = L'\0';\r
  FUNLOCKFILE(fp);\r
\r
  return (ws);\r
\r
error:\r
  FUNLOCKFILE(fp);\r
  return (NULL);\r
}\r