Mercurial > gnulib
view lib/wcstok-impl.h @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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/* Split a wide string into tokens. Copyright (C) 1999, 2011-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 1999. 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 3 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, see <https://www.gnu.org/licenses/>. */ wchar_t * wcstok (wchar_t *wcs, const wchar_t *delim, wchar_t **ptr) { if (wcs == NULL) { wcs = *ptr; if (wcs == NULL) return NULL; /* reminder that end of token sequence has been reached */ } /* Skip leading delimiters. */ wcs += wcsspn (wcs, delim); /* Found a token? */ if (*wcs == (wchar_t)'\0') { *ptr = NULL; return NULL; } /* Move past the token. */ { wchar_t *token_end = wcspbrk (wcs, delim); if (token_end) { /* NUL-terminate the token. */ *token_end = (wchar_t)'\0'; *ptr = token_end + 1; } else *ptr = NULL; } return wcs; }