Mercurial > gnulib
view lib/getsubopt.c @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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/* Parse comma separated list into words. Copyright (C) 1996-1997, 1999, 2004, 2007, 2009-2019 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. 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/>. */ #if !_LIBC # include <config.h> #endif #include <stdlib.h> #include <string.h> #if !_LIBC /* This code is written for inclusion in gnu-libc, and uses names in the namespace reserved for libc. If we're compiling in gnulib, define those names to be the normal ones instead. */ # undef __strchrnul # define __strchrnul strchrnul #endif /* Parse comma separated suboption from *OPTIONP and match against strings in TOKENS. If found return index and set *VALUEP to optional value introduced by an equal sign. If the suboption is not part of TOKENS return in *VALUEP beginning of unknown suboption. On exit *OPTIONP is set to the beginning of the next token or at the terminating NUL character. */ int getsubopt (char **optionp, char *const *tokens, char **valuep) { char *endp, *vstart; int cnt; if (**optionp == '\0') return -1; /* Find end of next token. */ endp = __strchrnul (*optionp, ','); /* Find start of value. */ vstart = memchr (*optionp, '=', endp - *optionp); if (vstart == NULL) vstart = endp; /* Try to match the characters between *OPTIONP and VSTART against one of the TOKENS. */ for (cnt = 0; tokens[cnt] != NULL; ++cnt) if (strncmp (*optionp, tokens[cnt], vstart - *optionp) == 0 && tokens[cnt][vstart - *optionp] == '\0') { /* We found the current option in TOKENS. */ *valuep = vstart != endp ? vstart + 1 : NULL; if (*endp != '\0') *endp++ = '\0'; *optionp = endp; return cnt; } /* The current suboption does not match any option. */ *valuep = *optionp; if (*endp != '\0') *endp++ = '\0'; *optionp = endp; return -1; }