1//===-- source/Host/common/OptionParser.cpp -------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Host/OptionParser.h"
10#include "lldb/Host/HostGetOpt.h"
11#include "lldb/Utility/OptionDefinition.h"
12#include "lldb/lldb-private-types.h"
13
14#include <vector>
15
16using namespace lldb_private;
17
18void OptionParser::Prepare(std::unique_lock<std::mutex> &lock) {
19  static std::mutex g_mutex;
20  lock = std::unique_lock<std::mutex>(g_mutex);
21#ifdef __GLIBC__
22  optind = 0;
23#else
24  optreset = 1;
25  optind = 1;
26#endif
27}
28
29void OptionParser::EnableError(bool error) { opterr = error ? 1 : 0; }
30
31int OptionParser::Parse(llvm::MutableArrayRef<char *> argv,
32                        llvm::StringRef optstring, const Option *longopts,
33                        int *longindex) {
34  std::vector<option> opts;
35  while (longopts->definition != nullptr) {
36    option opt;
37    opt.flag = longopts->flag;
38    opt.val = longopts->val;
39    opt.name = longopts->definition->long_option;
40    opt.has_arg = longopts->definition->option_has_arg;
41    opts.push_back(opt);
42    ++longopts;
43  }
44  opts.push_back(option());
45  std::string opt_cstr = std::string(optstring);
46  return getopt_long_only(argv.size() - 1, argv.data(), opt_cstr.c_str(),
47                          &opts[0], longindex);
48}
49
50char *OptionParser::GetOptionArgument() { return optarg; }
51
52int OptionParser::GetOptionIndex() { return optind; }
53
54int OptionParser::GetOptionErrorCause() { return optopt; }
55
56std::string OptionParser::GetShortOptionString(struct option *long_options) {
57  std::string s;
58  int i = 0;
59  bool done = false;
60  while (!done) {
61    if (long_options[i].name == nullptr && long_options[i].has_arg == 0 &&
62        long_options[i].flag == nullptr && long_options[i].val == 0) {
63      done = true;
64    } else {
65      if (long_options[i].flag == nullptr && isalpha(long_options[i].val)) {
66        s.append(1, (char)long_options[i].val);
67        switch (long_options[i].has_arg) {
68        default:
69        case no_argument:
70          break;
71
72        case optional_argument:
73          s.append(2, ':');
74          break;
75        case required_argument:
76          s.append(1, ':');
77          break;
78        }
79      }
80      ++i;
81    }
82  }
83  return s;
84}
85