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