strsep.c

来自「打魔兽战网的都知道他是什么」· C语言 代码 · 共 58 行

/*
 * Copyright (C) 2002  Ross Combs ([e-mail])
 *
 * 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
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include "common/setup_before.h"
#ifndef HAVE_STRSEP

#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
#  include <strings.h>
# endif
#endif
#include "compat/strchr.h"
#include "strsep.h"
#include "common/setup_after.h"


extern char * strsep(char * * str, char const * delims)
{
    char * begin;

    begin = *str;
    
    if (!begin)
        return NULL; /* already returned last token */
   
    /* FIXME: optimiz case of 1 char delims (maybe not worth the effort) */ 
    for (; **str!='\0'; (*str)++)
        if (strchr(delims,**str))
        {
            **str = '\0'; /* terminate token */
            (*str)++; /* remember the position of the next char */
            return begin;
        }
    
    *str = NULL;
    return begin; /* return the whole input string */
}

#else
typedef int filenotempty; /* make ISO standard happy */
#endif