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/* Tokenize UTF-8/UTF-16/UTF-32 string.
Copyright (C) 1999, 2002, 2006, 2009-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2002.
This file is free software.
It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
You can redistribute it and/or modify it under either
- the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3, or (at your
option) any later version, or
- the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option)
any later version, or
- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
This file 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 and the GNU General Public License
for more details.
You should have received a copy of the GNU Lesser General Public
License and of the GNU General Public License along with this
program. If not, see <https://www.gnu.org/licenses/>. */
UNIT *
FUNC (UNIT *str, const UNIT *delim, UNIT **ptr)
{
if (str == NULL)
{
str = *ptr;
if (str == NULL)
return NULL; /* reminder that end of token sequence has been reached */
}
/* Skip leading delimiters. */
str += U_STRSPN (str, delim);
/* Found a token? */
if (*str == 0)
{
*ptr = NULL;
return NULL;
}
/* Move past the token. */
{
UNIT *token_end = U_STRPBRK (str, delim);
if (token_end)
{
*ptr = token_end + U_STRMBLEN (token_end);
/* NUL-terminate the token. */
*token_end = 0;
}
else
*ptr = NULL;
}
return str;
}
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