1 //===-- source/Host/common/OptionParser.cpp ---------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "lldb/Host/OptionParser.h"
11 #include "lldb/Host/HostGetOpt.h"
12 #include "lldb/lldb-private-types.h"
13 
14 #include <vector>
15 
16 using namespace lldb_private;
17 
18 void 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 
29 void OptionParser::EnableError(bool error) { opterr = error ? 1 : 0; }
30 
31 int OptionParser::Parse(int argc, char *const argv[], llvm::StringRef optstring,
32                         const Option *longopts, 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 = optstring;
45   return getopt_long_only(argc, argv, opt_cstr.c_str(), &opts[0], longindex);
46 }
47 
48 char *OptionParser::GetOptionArgument() { return optarg; }
49 
50 int OptionParser::GetOptionIndex() { return optind; }
51 
52 int OptionParser::GetOptionErrorCause() { return optopt; }
53 
54 std::string OptionParser::GetShortOptionString(struct option *long_options) {
55   std::string s;
56   int i = 0;
57   bool done = false;
58   while (!done) {
59     if (long_options[i].name == 0 && long_options[i].has_arg == 0 &&
60         long_options[i].flag == 0 && long_options[i].val == 0) {
61       done = true;
62     } else {
63       if (long_options[i].flag == NULL && isalpha(long_options[i].val)) {
64         s.append(1, (char)long_options[i].val);
65         switch (long_options[i].has_arg) {
66         default:
67         case no_argument:
68           break;
69 
70         case optional_argument:
71           s.append(2, ':');
72           break;
73         case required_argument:
74           s.append(1, ':');
75           break;
76         }
77       }
78       ++i;
79     }
80   }
81   return s;
82 }
83