glibc/sysdeps/generic/strsep.c

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/* Copyright (C) 1992, 1993, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <string.h>
char *
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strsep (char **stringp, const char *delim)
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{
char *begin, *end;
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begin = *stringp;
if (! begin || *begin == '\0')
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return NULL;
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/* Find the end of the token. */
end = strpbrk (begin, delim);
if (end)
{
/* Terminate the token and advance *STRINGP past the delimiters. */
*end++ = '\0';
*stringp = end + strspn (end, delim);
}
else
/* No more delimiters; this is the last token. */
*stringp = NULL;
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return begin;
}