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124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
7 years ago
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#if _MSC_VER >= 1400
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# pragma warning(disable : 4996)
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#endif
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// included header files
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <iostream>
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#include "utils.hpp"
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#include "getopt.hpp"
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namespace Util {
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// https://raw.githubusercontent.com/skeeto/getopt/master/getopt.h
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int optind = 0;
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int opterr = 1;
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int optopt;
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int optpos = 1;
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const char* optarg;
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/* A minimal POSIX getopt() implementation in ANSI C
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*
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* This is free and unencumbered software released into the public domain.
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*
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* This implementation supports the convention of resetting the option
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* parser by assigning optind to 0. This resets the internal state
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* appropriately.
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*
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* Ref: http://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
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*/
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int getopt(int argc, char * const argv[], const char *optstring)
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{
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const char *arg;
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(void)argc;
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/* Reset? */
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if (optind == 0) {
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optind = 1;
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optpos = 1;
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}
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arg = argv[optind];
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if (arg && strcmp(arg, "--") == 0) {
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optind++;
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return -1;
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} else if (!arg || arg[0] != '-' || !isalnum(arg[1])) {
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return -1;
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} else {
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const char *opt = strchr(optstring, arg[optpos]);
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optopt = arg[optpos];
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if (!opt) {
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if (opterr && *optstring != ':')
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fprintf(stderr, "%s: illegal option: %c\n", argv[0], optopt);
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return '?';
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} else if (opt[1] == ':') {
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if (arg[optpos + 1]) {
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optarg = (char *)arg + optpos + 1;
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optind++;
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optpos = 1;
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return optopt;
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} else if (argv[optind + 1]) {
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optarg = (char *)argv[optind + 1];
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optind += 2;
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optpos = 1;
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return optopt;
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} else {
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if (opterr && *optstring != ':')
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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 *optstring == ':' ? ':' : '?';
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}
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} else {
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if (!arg[++optpos]) {
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optind++;
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optpos = 1;
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}
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return optopt;
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}
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}
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}
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// *****************************************************************************
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// class Getopt
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Getopt::Getopt()
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: errcnt_(0)
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{
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}
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Getopt::~Getopt()
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{
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}
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int Getopt::getopt(int argc, char* const argv[], const std::string& optstring)
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{
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progname_ = Util::basename(argv[0]);
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Util::optind = 0; // reset the Util::Getopt scanner
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for (;;) {
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int c = Util::getopt(argc, argv, optstring.c_str());
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if (c == -1) break;
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errcnt_ += option(c, Util::optarg == 0 ? "" : Util::optarg, Util::optopt);
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}
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for (int i = Util::optind; i < argc; i++) {
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errcnt_ += nonoption(argv[i]);
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}
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return errcnt_;
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}
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int Getopt::nonoption(const std::string& /*argv*/)
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{
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return 0;
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}
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} // namespace Util
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