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glibc/wcsmbs/wcstok.c
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/* Copyright (C) 1995-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. | |
The GNU C 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. | |
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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <wchar.h> | |
#include <errno.h> | |
/* Parse WCS into tokens separated by characters in DELIM. If WCS is | |
NULL, the last string wcstok() was called with is used. */ | |
wchar_t * | |
wcstok (wchar_t *wcs, const wchar_t *delim, wchar_t **save_ptr) | |
{ | |
wchar_t *result; | |
if (wcs == NULL) | |
{ | |
if (*save_ptr == NULL) | |
{ | |
__set_errno (EINVAL); | |
return NULL; | |
} | |
else | |
wcs = *save_ptr; | |
} | |
/* Scan leading delimiters. */ | |
wcs += wcsspn (wcs, delim); | |
if (*wcs == L'\0') | |
{ | |
*save_ptr = NULL; | |
return NULL; | |
} | |
/* Find the end of the token. */ | |
result = wcs; | |
wcs = wcspbrk (result, delim); | |
if (wcs == NULL) | |
/* This token finishes the string. */ | |
*save_ptr = NULL; | |
else | |
{ | |
/* Terminate the token and make *SAVE_PTR point past it. */ | |
*wcs = L'\0'; | |
*save_ptr = wcs + 1; | |
} | |
return result; | |
} |