1// Copyright Vladimir Prus 2002-2004.
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE_1_0.txt
4// or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6#define BOOST_PROGRAM_OPTIONS_SOURCE
7#include <boost/program_options/parsers.hpp>
8#include <cctype>
9
10using std::size_t;
11
12#ifdef _WIN32
13namespace boost { namespace program_options {
14
15 // Take a command line string and splits in into tokens, according
16 // to the rules windows command line processor uses.
17 //
18 // The rules are pretty funny, see
19 // http://article.gmane.org/gmane.comp.lib.boost.user/3005
20 // http://msdn.microsoft.com/library/en-us/vccelng/htm/progs_12.asp
21 BOOST_PROGRAM_OPTIONS_DECL
22 std::vector<std::string> split_winmain(const std::string& input)
23 {
24 std::vector<std::string> result;
25
26 std::string::const_iterator i = input.begin(), e = input.end();
27 for(;i != e; ++i)
28 if (!isspace((unsigned char)*i))
29 break;
30
31 if (i != e) {
32
33 std::string current;
34 bool inside_quoted = false;
35 bool empty_quote = false;
36 int backslash_count = 0;
37
38 for(; i != e; ++i) {
39 if (*i == '"') {
40 // '"' preceded by even number (n) of backslashes generates
41 // n/2 backslashes and is a quoted block delimiter
42 if (backslash_count % 2 == 0) {
43 current.append(backslash_count / 2, '\\');
44 empty_quote = inside_quoted && current.empty();
45 inside_quoted = !inside_quoted;
46 // '"' preceded by odd number (n) of backslashes generates
47 // (n-1)/2 backslashes and is literal quote.
48 } else {
49 current.append(backslash_count / 2, '\\');
50 current += '"';
51 }
52 backslash_count = 0;
53 } else if (*i == '\\') {
54 ++backslash_count;
55 } else {
56 // Not quote or backslash. All accumulated backslashes should be
57 // added
58 if (backslash_count) {
59 current.append(backslash_count, '\\');
60 backslash_count = 0;
61 }
62 if (isspace((unsigned char)*i) && !inside_quoted) {
63 // Space outside quoted section terminate the current argument
64 result.push_back(current);
65 current.resize(0);
66 empty_quote = false;
67 for(;i != e && isspace((unsigned char)*i); ++i)
68 ;
69 --i;
70 } else {
71 current += *i;
72 }
73 }
74 }
75
76 // If we have trailing backslashes, add them
77 if (backslash_count)
78 current.append(backslash_count, '\\');
79
80 // If we have non-empty 'current' or we're still in quoted
81 // section (even if 'current' is empty), add the last token.
82 if (!current.empty() || inside_quoted || empty_quote)
83 result.push_back(current);
84 }
85 return result;
86 }
87
88#ifndef BOOST_NO_STD_WSTRING
89 BOOST_PROGRAM_OPTIONS_DECL std::vector<std::wstring>
90 split_winmain(const std::wstring& cmdline)
91 {
92 std::vector<std::wstring> result;
93 std::vector<std::string> aux = split_winmain(to_internal(cmdline));
94 for (size_t i = 0, e = aux.size(); i < e; ++i)
95 result.push_back(from_utf8(aux[i]));
96 return result;
97 }
98#endif
99
100}}
101#endif
102
103