fgetws.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

/* $Id: fgetws.c 21964 2006-05-21 13:38:45Z greatlrd $
 *
 *  ReactOS msvcrt library
 *
 *  fgets.c
 *
 *  Copyright (C) 2002  Robert Dickenson <[e-mail]>
 *
 *  Based on original work Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details
 *                         28/12/1998: Appropriated for Reactos
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <precomp.h>

#ifndef WEOF
#define WEOF    (wchar_t)(0xFFFF)
#endif

wchar_t* fgetws(wchar_t* s, int n, FILE* f)
{

  int c=0;
  wchar_t *cs;

  cs = s;
  while (--n>0 && (c = getwc(f)) != WEOF)
  {
    *cs++ = c;
    if (c == L'\n')
      break;
  }
  if (c == WEOF && cs == s)
    return NULL;
  *cs++ = L'\0';
  return s;
}