Ben Pfaff
67 lines
2.6 KiB
C
67 lines
2.6 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#include <config.h>
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#include "command-line.h"
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#include <getopt.h>
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#include <limits.h>
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#include "util.h"
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#include "vlog.h"
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/* Given the GNU-style long options in 'options', returns a string that may be
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* passed to getopt() with the corresponding short options. The caller is
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* responsible for freeing the string. */
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char *
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long_options_to_short_options(const struct option options[])
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{
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char short_options[UCHAR_MAX * 3 + 1];
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char *p = short_options;
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for (; options->name; options++) {
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const struct option *o = options;
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if (o->flag == NULL && o->val > 0 && o->val <= UCHAR_MAX) {
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*p++ = o->val;
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if (o->has_arg == required_argument) {
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*p++ = ':';
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} else if (o->has_arg == optional_argument) {
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*p++ = ':';
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*p++ = ':';
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}
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}
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}
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*p = '\0';
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return xstrdup(short_options);
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}
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