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AP_HAL: added getopt_cpp class
a simple port of getopt_long to C++
This commit is contained in:
Andrew Tridgell
parent
438f954379
commit
35d22b9d57
203
libraries/AP_HAL/utility/getopt_cpp.cpp
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203
libraries/AP_HAL/utility/getopt_cpp.cpp
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/*
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* getopt_long() -- long options parser
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*
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* Portions Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Portions Copyright (c) 2003
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* PostgreSQL Global Development Group
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*
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* Simple conversion to C++ by Andrew Tridgell for ArduPilot. Based on
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* getopt_long.cpp from ccache
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "getopt_cpp.h"
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#include <stdio.h>
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#include <string.h>
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/*
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constructor
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*/
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GetOptLong::GetOptLong(int _argc, char *const _argv[], const char *_optstring, const GetOptLong::option * _longopts) :
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argc(_argc),
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argv(_argv),
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optstring(_optstring),
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longopts(_longopts),
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opterr(0),
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optind(1),
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optopt(0),
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longindex(-1),
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optarg(NULL),
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place("")
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{}
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/*
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main parse code
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*/
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int GetOptLong::getoption(void)
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{
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const char *oli; /* option letter list index */
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if (!*place)
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{ /* update scanning pointer */
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if (optind >= argc)
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{
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place = "";
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return -1;
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}
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place = argv[optind];
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if (place[0] != '-')
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{
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place = "";
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return -1;
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}
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place++;
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if (place[0] && place[0] == '-' && place[1] == '\0')
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{ /* found "--" */
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++optind;
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place = "";
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return -1;
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}
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if (place[0] && place[0] == '-' && place[1])
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{
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/* long option */
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size_t namelen;
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int i;
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place++;
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namelen = strcspn(place, "=");
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for (i = 0; longopts[i].name != NULL; i++)
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{
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if (strlen(longopts[i].name) == namelen
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&& strncmp(place, longopts[i].name, namelen) == 0)
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{
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if (longopts[i].has_arg)
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{
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if (place[namelen] == '=')
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optarg = place + namelen + 1;
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else if (optind < argc - 1)
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{
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optind++;
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optarg = argv[optind];
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}
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else
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{
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if (optstring[0] == ':')
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return BADARG;
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if (opterr)
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fprintf(stderr,
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"%s: option requires an argument -- %s\n",
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argv[0], place);
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place = "";
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optind++;
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return BADCH;
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}
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}
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else
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{
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optarg = NULL;
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if (place[namelen] != 0)
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{
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/* XXX error? */
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}
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}
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optind++;
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longindex = i;
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place = "";
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if (longopts[i].flag == NULL)
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return longopts[i].val;
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else
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{
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*longopts[i].flag = longopts[i].val;
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return 0;
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}
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}
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}
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if (opterr && optstring[0] != ':')
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fprintf(stderr,
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"%s: illegal option -- %s\n", argv[0], place);
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place = "";
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optind++;
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return BADCH;
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}
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}
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/* short option */
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optopt = (int) *place++;
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oli = strchr(optstring, optopt);
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if (!oli)
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{
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if (!*place)
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++optind;
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if (opterr && *optstring != ':')
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fprintf(stderr,
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"%s: illegal option -- %c\n", argv[0], optopt);
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return BADCH;
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}
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if (oli[1] != ':')
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{ /* don't need argument */
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optarg = NULL;
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if (!*place)
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++optind;
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}
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else
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{ /* need an argument */
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if (*place) /* no white space */
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optarg = place;
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else if (argc <= ++optind)
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{ /* no arg */
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place = "";
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if (*optstring == ':')
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return BADARG;
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if (opterr)
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fprintf(stderr,
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"%s: option requires an argument -- %c\n",
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argv[0], optopt);
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return BADCH;
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}
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else
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/* white space */
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optarg = argv[optind];
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place = "";
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++optind;
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}
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return optopt;
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}
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49
libraries/AP_HAL/utility/getopt_cpp.h
Normal file
49
libraries/AP_HAL/utility/getopt_cpp.h
Normal file
@ -0,0 +1,49 @@
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/*
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* Portions Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Portions Copyright (c) 2003-2010, PostgreSQL Global Development
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* Group
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*
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* Simple conversion to C++ by Andrew Tridgell for ArduPilot. Based on
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* getopt_long.h from ccache
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*/
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#ifndef GETOPT_LONG_H
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#define GETOPT_LONG_H
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#include <stdbool.h>
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class GetOptLong {
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public:
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struct option {
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const char *name;
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bool has_arg;
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int *flag;
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int val;
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};
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GetOptLong(int argc, char *const argv[], const char *optstring, const option * longopts);
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int opterr;
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int optind;
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int optopt;
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int longindex;
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const char *optarg;
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enum error_return {
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BADCH='?',
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BADARG=':'
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};
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int getoption(void);
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private:
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int argc;
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char *const *argv;
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const char *optstring;
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const struct option *longopts;
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const char *place;
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};
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#endif /* GETOPT_LONG_H */
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