| 1 | /**
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| 2 | Utility class for parsing the commandline passed to WinMain and
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| 3 | extracting options and option arguments
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| 4 |
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| 5 | Author: Martin Szydlowski
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| 6 | */
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| 7 |
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| 8 | #include <vector>
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| 9 | #include <string>
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| 10 |
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| 11 | //using namespace std;
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| 12 |
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| 13 | static enum arg_types
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| 14 | {
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| 15 | ARGUMENT_NONE,
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| 16 | ARGUMENT_REQUIRED,
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| 17 | ARGUMENT_OPTIONAL
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| 18 | };
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| 19 |
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| 20 | class WinCmdLineParser
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| 21 | {
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| 22 | public:
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| 23 | // describes one option
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| 24 | struct option_info
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| 25 | {
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| 26 | option_info():
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| 27 | shortname(""), longname(""), argtype(ARGUMENT_NONE)
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| 28 | {
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| 29 |
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| 30 | }
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| 31 |
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| 32 | option_info(const std::string& sname, const std::string& lname, arg_types atype):
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| 33 | shortname(sname), longname(lname), argtype(atype)
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| 34 | {
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| 35 |
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| 36 | }
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| 37 |
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| 38 | bool operator == (const option_info& rhs) const
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| 39 | {
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| 40 | if ((!(shortname.empty() || rhs.shortname.empty()) && shortname == rhs.shortname) ||
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| 41 | (!(longname.empty() || rhs.longname.empty()) && longname == rhs.longname))
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| 42 | return true;
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| 43 | else
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| 44 | return false;
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| 45 | }
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| 46 |
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| 47 | std::string shortname;
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| 48 | std::string longname;
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| 49 | arg_types argtype;
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| 50 | };
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| 51 |
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| 52 | struct option_found
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| 53 | {
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| 54 | option_found():
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| 55 | shortname(""), longname(""), optarg("")
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| 56 | {
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| 57 |
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| 58 | }
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| 59 |
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| 60 | option_found(const std::string& sname, const std::string& lname, const std::string& arg):
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| 61 | shortname(sname), longname(lname), optarg(arg)
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| 62 | {
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| 63 |
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| 64 | }
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| 65 |
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| 66 | bool operator == (const option_found& rhs) const
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| 67 | {
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| 68 | if ((!(shortname.empty() || rhs.shortname.empty()) && shortname == rhs.shortname) ||
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| 69 | (!(longname.empty() || rhs.longname.empty()) && longname == rhs.longname))
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| 70 | return true;
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| 71 | else
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| 72 | return false;
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| 73 | }
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| 74 |
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| 75 | std::string shortname;
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| 76 | std::string longname;
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| 77 | std::string optarg;
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| 78 | };
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| 79 |
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| 80 | WinCmdLineParser(const char * strCmdLine, bool caseSensitive = false):
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| 81 | case_sensitive(caseSensitive), reparse(true)
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| 82 | {
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| 83 | op_case_transform = tolower;
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| 84 | splitStrCmdLine(strCmdLine, m_argv);
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| 85 | }
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| 86 |
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| 87 | ~WinCmdLineParser()
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| 88 | {
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| 89 |
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| 90 | }
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| 91 |
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| 92 | String dumpOptSet()
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| 93 | {
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| 94 | std::string sDump;
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| 95 |
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| 96 | for (std::vector<option_info>::iterator it = m_optset.begin(); it != m_optset.end(); it ++)
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| 97 | {
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| 98 | sDump += it->shortname + ", " + it->longname + "\n";
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| 99 | }
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| 100 |
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| 101 | return sDump;
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| 102 | }
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| 103 |
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| 104 | // add an option with short & long name (each optional, but one mandatory)
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| 105 | // only alphanumeric chars valid
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| 106 | WinCmdLineParser& addOpt(const std::string& sname, const std::string& lname, arg_types argtype)
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| 107 | {
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| 108 | std::string shortname = sname;
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| 109 | std::string longname = lname;
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| 110 |
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| 111 | //bool invalid = false;
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| 112 |
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| 113 | // check sanity: presence & length
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| 114 | if (shortname.size() == 0 && longname.size() == 0)
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| 115 | throw std::string("Invalid option specification: Specify at least a short name or a long name");
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| 116 | //invalid = true;
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| 117 | if (shortname.size() > 1)
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| 118 | throw std::string("Invalid option specification: Short name too long, must be one character");
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| 119 | //invalid = true;
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| 120 | if (longname.size() == 1)
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| 121 | throw std::string("Invalid option specification: Long name too short, must be at least two characters");
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| 122 | //invalid = true;
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| 123 |
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| 124 | // check sanity: valid characters
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| 125 | static std::string valid_chars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
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| 126 |
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| 127 | for (size_t i = 0; i < shortname.length(); i ++)
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| 128 | if (valid_chars.find(shortname[i]) == std::string::npos)
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| 129 | throw std::string("Invalid option specification: Invalid character in short name: " + shortname);
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| 130 | //invalid = true;
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| 131 |
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| 132 | for (size_t i = 0; i < longname.length(); i ++)
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| 133 | if (valid_chars.find(longname[i]) == std::string::npos)
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| 134 | throw std::string("Invalid option specification: Invalid character in long name: " + longname);
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| 135 | //invalid = true;
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| 136 |
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| 137 | // if all is well add option to list
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| 138 | //if (!invalid)
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| 139 | //{
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| 140 | // convert to all upper case when case-insensitive options
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| 141 | if (!case_sensitive)
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| 142 | {
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| 143 | std::transform(shortname.begin(), shortname.end(), shortname.begin(), op_case_transform);
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| 144 | std::transform(longname.begin(), longname.end(), longname.begin(), op_case_transform);
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| 145 | }
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| 146 |
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| 147 | // try inserting
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| 148 | std::pair<option_info, bool> res = insertOpt(option_info(shortname, longname, argtype), m_optset);
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| 149 | if (!res.second)
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| 150 | {
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| 151 | throw std::string("Conflicting option specification: (" +
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| 152 | (shortname.empty() ? "" : " -" + shortname) +
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| 153 | (longname.empty() ? "" : " --" + longname) +
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| 154 | ") conflicts with (" +
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| 155 | (res.first.shortname.empty() ? "" : " -" + res.first.shortname) +
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| 156 | (res.first.longname.empty() ? "" : " --" + res.first.longname) + ")");
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| 157 | }
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| 158 | else
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| 159 | {
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| 160 | reparse = true;
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| 161 | }
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| 162 | //}
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| 163 |
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| 164 | return *this;
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| 165 | }
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| 166 |
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| 167 | // returns true when option present, false otherwise
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| 168 | bool getOpt(const std::string& opt)
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| 169 | {
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| 170 | // dummy string
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| 171 | std::string optarg;
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| 172 | return getOpt(opt, optarg);
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| 173 | }
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| 174 |
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| 175 |
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| 176 | // returns true when option was present in the cmd-line and puts the argument
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| 177 | // in optarg, when present
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| 178 | bool getOpt(const std::string& opt, std::string& optarg)
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| 179 | {
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| 180 | if (reparse)
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| 181 | {
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| 182 | parseOpt(m_argv, m_optset, m_optfound, m_noopt);
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| 183 | reparse = false;
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| 184 | }
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| 185 |
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| 186 | optarg.clear();
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| 187 |
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| 188 | std::string option = opt;
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| 189 | option_found of;
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| 190 |
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| 191 | if (!case_sensitive)
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| 192 | std::transform(option.begin(), option.end(), option.begin(), op_case_transform);
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| 193 |
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| 194 | if (option.length() == 1) // short option
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| 195 | of.shortname = option;
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| 196 | else if (option.length() > 1) // long option
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| 197 | of.longname = option;
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| 198 | else // don't mess with me
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| 199 | return false;
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| 200 |
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| 201 | if (findOptArg(m_optfound, of))
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| 202 | {
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| 203 | optarg = of.optarg;
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| 204 | return true;
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| 205 | }
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| 206 | else
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| 207 | {
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| 208 | return false;
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| 209 | }
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| 210 | }
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| 211 |
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| 212 | // returns true when any non-option arguments were in the cmd line
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| 213 | // and places them in the arguments vector
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| 214 | bool getArgs(std::vector<std::string>& arguments)
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| 215 | {
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| 216 | if (reparse)
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| 217 | {
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| 218 | parseOpt(m_argv, m_optset, m_optfound, m_noopt);
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| 219 | reparse = false;
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| 220 | }
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| 221 |
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| 222 | arguments.clear();
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| 223 |
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| 224 | arguments = m_noopt;
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| 225 |
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| 226 | if (m_noopt.size() > 0)
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| 227 | return true;
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| 228 | else
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| 229 | return false;
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| 230 | }
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| 231 |
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| 232 | protected:
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| 233 | // split a space-separated string argument in an array of strings
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| 234 | // sensitive to ", the only windows way to pass strings with embedded spaces
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| 235 | void splitStrCmdLine(const char *strCmdLine, std::vector<std::string>& argv)
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| 236 | {
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| 237 | std::string cmdline(strCmdLine);
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| 238 | argv.clear();
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| 239 |
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| 240 | std::string tmp;
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| 241 | unsigned int strpos = 0;
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| 242 | bool skipspace = false;
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| 243 |
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| 244 | while (strpos < cmdline.length())
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| 245 | {
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| 246 | while (strpos < cmdline.length() && cmdline[strpos] == ' ')
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| 247 | strpos++;
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| 248 | tmp.clear();
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| 249 | while (strpos < cmdline.length() && (cmdline[strpos] != ' ' || skipspace))
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| 250 | {
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| 251 | if (cmdline[strpos] == '"')
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| 252 | {
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| 253 | ++ strpos;
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| 254 | skipspace = !skipspace;
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| 255 | if (!skipspace)
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| 256 | continue;
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| 257 | }
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| 258 |
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| 259 | tmp += cmdline[strpos ++];
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| 260 | }
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| 261 | argv.push_back(tmp);
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| 262 | }
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| 263 |
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| 264 | //std::ofstream testout("test.txt");
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| 265 |
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| 266 | //testout << cmdline << "\n\n";
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| 267 |
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| 268 | //std::vector<std::string>::iterator it = argv.begin();
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| 269 | //while (it != argv.end())
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| 270 | //{
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| 271 | // testout << *it << "\n";
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| 272 | // ++ it;
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| 273 | //}
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| 274 |
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| 275 | //testout.close();
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| 276 | }
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| 277 |
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| 278 | void parseOpt(const std::vector<std::string>& argv, const std::vector<option_info>& optset,
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| 279 | std::vector<option_found>& optfound, std::vector<std::string>& noopt)
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| 280 | {
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| 281 | // reset old options list
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| 282 | optfound.clear();
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| 283 |
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| 284 | // bail out when nothing to parse
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| 285 | if (argv.empty() || optset.empty())
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| 286 | return;
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| 287 |
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| 288 | // iterate through argv and create opt_founds
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| 289 | size_t item = 0;
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| 290 | while (item < argv.size())
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| 291 | {
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| 292 | // dummy info for lookup
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| 293 | std::string optstr;
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| 294 | option_info info;
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| 295 |
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| 296 | // skip empty items, shold not happen actually ...
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| 297 | if (argv[item].length() > 0)
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| 298 | {
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| 299 | // check if item might be option (starts with /, - or --)
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| 300 | if (argv[item][0] == '-')
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| 301 | {
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| 302 | // unix-style option, one dash - long or short option
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| 303 | // two dashes - long option
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| 304 | optstr = argv[item].substr(1, argv[item].length());
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| 305 | if (optstr.length() > 1 && optstr[0] == '-') // long option
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| 306 | {
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| 307 | optstr = optstr.substr(1, optstr.length());
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| 308 | if (optstr.length() == 1) // invalid
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| 309 | optstr = "";
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| 310 | }
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| 311 | }
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| 312 | else if (argv[item][0] == '/')
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| 313 | {
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| 314 | // windows-style option, long or short
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| 315 | optstr = argv[item].substr(1, argv[item].length());
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| 316 | }
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| 317 | else
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| 318 | {
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| 319 | // no option and no option argument since these are skipped
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| 320 | // -> must be a program argument
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| 321 | noopt.push_back(argv[item]);
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| 322 | ++ item;
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| 323 | continue;
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| 324 | }
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| 325 |
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| 326 | if (!case_sensitive)
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| 327 | std::transform(optstr.begin(), optstr.end(), optstr.begin(), op_case_transform);
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| 328 |
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| 329 | if (optstr.length() == 1) // short option
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| 330 | info.shortname = optstr;
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| 331 | else if (optstr.length() > 1) // long option
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| 332 | info.longname = optstr;
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| 333 |
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| 334 | // lookup
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| 335 | if (findOpt(optset, info))
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| 336 | {
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| 337 | // find optarg
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| 338 | std::string optarg;
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| 339 | if (item + 1 < argv.size())
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| 340 | optarg = argv[item + 1];
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| 341 |
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| 342 | std::pair<option_found, bool> res;
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| 343 |
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| 344 | switch (info.argtype)
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| 345 | {
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| 346 | case ARGUMENT_NONE:
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| 347 | res = insertOptArg(option_found(info.shortname, info.longname, ""), optfound);
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| 348 | if (!res.second)
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| 349 | {
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| 350 | throw std::string("Duplicate option: (" +
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| 351 | (res.first.shortname.empty() ? "" : " -" + res.first.shortname) +
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| 352 | (res.first.longname.empty() ? "" : " --" + res.first.longname) +
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| 353 | ") allready specified");
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| 354 | }
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| 355 | break;
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| 356 | case ARGUMENT_REQUIRED:
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| 357 | if (optarg.length() > 0 && optarg[0] != '-' && optarg[0] != '/')
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| 358 | {
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| 359 | res = insertOptArg(option_found(info.shortname, info.longname, optarg), optfound);
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| 360 | if (!res.second)
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| 361 | {
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| 362 | throw std::string("Duplicate option: (" +
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| 363 | (res.first.shortname.empty() ? "" : " -" + res.first.shortname) +
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| 364 | (res.first.longname.empty() ? "" : " --" + res.first.longname) +
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| 365 | ") allready specified with argument: " + res.first.optarg);
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| 366 | }
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| 367 | ++ item;
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| 368 | }
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| 369 | else
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| 370 | {
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| 371 | throw std::string("Missing argument for option: " + argv[item]);
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| 372 | }
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| 373 | break;
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| 374 | case ARGUMENT_OPTIONAL:
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| 375 | if (optarg.length() > 0 && optarg[0] != '-' && optarg[0] != '/')
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| 376 | {
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| 377 | res = insertOptArg(option_found(info.shortname, info.longname, optarg), optfound);
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| 378 | if (!res.second)
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| 379 | {
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| 380 | throw std::string("Duplicate option: (" +
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| 381 | (res.first.shortname.empty() ? "" : " -" + res.first.shortname) +
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| 382 | (res.first.longname.empty() ? "" : " --" + res.first.longname) +
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| 383 | ") allready specified with argument: " + res.first.optarg);
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| 384 | }
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| 385 | ++ item;
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| 386 | }
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| 387 | else
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| 388 | {
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| 389 | res = insertOptArg(option_found(info.shortname, info.longname, ""), optfound);
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| 390 | if (!res.second)
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| 391 | {
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| 392 | throw std::string("Duplicate option: (" +
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| 393 | (res.first.shortname.empty() ? "" : " -" + res.first.shortname) +
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| 394 | (res.first.longname.empty() ? "" : " --" + res.first.longname) +
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| 395 | ") allready specified");
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| 396 | }
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| 397 | }
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| 398 | break;
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| 399 | default:
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| 400 | break;
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| 401 | }
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| 402 | }
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| 403 | // otherwise panic
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| 404 | else
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| 405 | {
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| 406 | throw std::string("Invalid option: " + argv[item]);
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| 407 | }
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| 408 |
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| 409 | }
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| 410 |
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| 411 | ++ item;
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| 412 | }
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| 413 | }
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| 414 |
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| 415 | std::pair<option_info, bool> insertOpt(const option_info& optinfo, std::vector<option_info>& optset)
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| 416 | {
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| 417 | // check for conflicts
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| 418 | for (size_t i = 0; i < optset.size(); i ++)
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| 419 | {
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| 420 | if (optinfo == optset[i])
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| 421 | {
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| 422 | return std::pair<option_info, bool>(optset[i], false);
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| 423 | }
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| 424 | }
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| 425 | // no conflicts - insert
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| 426 | optset.push_back(optinfo);
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| 427 | return std::pair<option_info, bool>(optinfo, true);
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| 428 | }
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| 429 |
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| 430 | bool findOpt(const std::vector<option_info>& optset, option_info& optinfo)
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| 431 | {
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| 432 | // find entry
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| 433 | for (size_t i = 0; i < optset.size(); i ++)
|
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| 434 | {
|
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| 435 | if (optinfo == optset[i])
|
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| 436 | {
|
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| 437 | optinfo = optset[i];
|
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| 438 | return true;
|
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| 439 | }
|
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| 440 | }
|
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| 441 | // not found - reset
|
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| 442 | return false;
|
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| 443 | }
|
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| 444 |
|
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| 445 | std::pair<option_found, bool> insertOptArg(const option_found& of, std::vector<option_found>& optfound)
|
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| 446 | {
|
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| 447 | // check for conflicts
|
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| 448 | for (size_t i = 0; i < optfound.size(); i ++)
|
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| 449 | {
|
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| 450 | if (of == optfound[i])
|
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| 451 | {
|
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| 452 | return std::pair<option_found, bool>(optfound[i], false);
|
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| 453 | }
|
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| 454 | }
|
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| 455 | // no conflicts - insert
|
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| 456 | optfound.push_back(of);
|
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| 457 | return std::pair<option_found, bool>(of, true);
|
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| 458 | }
|
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| 459 |
|
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| 460 | bool findOptArg(const std::vector<option_found>& optfound, option_found& of)
|
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| 461 | {
|
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| 462 | // find entry
|
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| 463 | for (size_t i = 0; i < optfound.size(); i ++)
|
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| 464 | {
|
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| 465 | if (of == optfound[i])
|
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| 466 | {
|
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| 467 | // found - set values
|
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| 468 | of = optfound[i];
|
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| 469 | return true;
|
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| 470 | }
|
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| 471 | }
|
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| 472 | // not found
|
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| 473 | return false;
|
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| 474 | }
|
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| 475 |
|
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| 476 | // holds the elements of the command line
|
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| 477 | std::vector<std::string> m_argv;
|
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| 478 |
|
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| 479 | // holds the elements of the command line which are not options or option arguments
|
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| 480 | std::vector<std::string> m_noopt;
|
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| 481 |
|
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| 482 | // all options we recognize
|
|---|
| 483 | std::vector<option_info> m_optset;
|
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| 484 |
|
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| 485 | // all options we have found so far
|
|---|
| 486 | std::vector<option_found> m_optfound;
|
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| 487 |
|
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| 488 | // parse options case sensitive?
|
|---|
| 489 | bool case_sensitive;
|
|---|
| 490 |
|
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| 491 | // reparse list for next getOpt
|
|---|
| 492 | bool reparse;
|
|---|
| 493 |
|
|---|
| 494 | // poiter to unary function for uppercase transform;
|
|---|
| 495 | int (*op_case_transform)(int);
|
|---|
| 496 | }; |
|---|
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