Mercurial > gnulib
view lib/getsubopt.c @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
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line source
/* 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; }