include/wx/cmdline.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/cmdline.h
   3 // Purpose:     wxCmdLineParser and related classes for parsing the command
   4 //              line options
   5 // Author:      Vadim Zeitlin
   6 // Modified by:
   7 // Created:     04.01.00
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  10 // Licence:     wxWindows licence
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_CMDLINE_H_
  14 #define _WX_CMDLINE_H_
  15
  16 #include "wx/defs.h"
  17
  18 #include "wx/string.h"
  19 #include "wx/arrstr.h"
  20 #include "wx/cmdargs.h"
  21
  22 #if wxUSE_CMDLINE_PARSER
  23
  24 class WXDLLIMPEXP_FWD_BASE wxDateTime;
  25
  26 // ----------------------------------------------------------------------------
  27 // constants
  28 // ----------------------------------------------------------------------------
  29
  30 // by default, options are optional (sic) and each call to AddParam() allows
  31 // one more parameter - this may be changed by giving non-default flags to it
  32 enum
  33 {
  34     wxCMD_LINE_OPTION_MANDATORY = 0x01, // this option must be given
  35     wxCMD_LINE_PARAM_OPTIONAL   = 0x02, // the parameter may be omitted
  36     wxCMD_LINE_PARAM_MULTIPLE   = 0x04, // the parameter may be repeated
  37     wxCMD_LINE_OPTION_HELP      = 0x08, // this option is a help request
  38     wxCMD_LINE_NEEDS_SEPARATOR  = 0x10  // must have sep before the value
  39 };
  40
  41 // an option value or parameter may be a string (the most common case), a
  42 // number or a date
  43 enum wxCmdLineParamType
  44 {
  45     wxCMD_LINE_VAL_STRING,  // should be 0 (default)
  46     wxCMD_LINE_VAL_NUMBER,
  47     wxCMD_LINE_VAL_DATE,
  48     wxCMD_LINE_VAL_NONE
  49 };
  50
  51 // for constructing the cmd line description using Init()
  52 enum wxCmdLineEntryType
  53 {
  54     wxCMD_LINE_SWITCH,
  55     wxCMD_LINE_OPTION,
  56     wxCMD_LINE_PARAM,
  57     wxCMD_LINE_NONE         // to terminate the list
  58 };
  59
  60 // ----------------------------------------------------------------------------
  61 // wxCmdLineEntryDesc is a description of one command line
  62 // switch/option/parameter
  63 // ----------------------------------------------------------------------------
  64
  65 struct wxCmdLineEntryDesc
  66 {
  67     wxCmdLineEntryType kind;
  68     const char *shortName;
  69     const char *longName;
  70     const char *description;
  71     wxCmdLineParamType type;
  72     int flags;
  73 };
  74
  75 // the list of wxCmdLineEntryDesc objects should be terminated with this one
  76 #define wxCMD_LINE_DESC_END \
  77         { wxCMD_LINE_NONE, NULL, NULL, NULL, wxCMD_LINE_VAL_NONE, 0x0 }
  78
  79 // ----------------------------------------------------------------------------
  80 // wxCmdLineParser is a class for parsing command line.
  81 //
  82 // It has the following features:
  83 //
  84 // 1. distinguishes options, switches and parameters; allows option grouping
  85 // 2. allows both short and long options
  86 // 3. automatically generates the usage message from the cmd line description
  87 // 4. does type checks on the options values (number, date, ...)
  88 //
  89 // To use it you should:
  90 //
  91 // 1. construct it giving it the cmd line to parse and optionally its desc
  92 // 2. construct the cmd line description using AddXXX() if not done in (1)
  93 // 3. call Parse()
  94 // 4. use GetXXX() to retrieve the parsed info
  95 // ----------------------------------------------------------------------------
  96
  97 class WXDLLIMPEXP_BASE wxCmdLineParser
  98 {
  99 public:
 100     // ctors and initializers
 101     // ----------------------
 102
 103     // default ctor or ctor giving the cmd line in either Unix or Win form
 104     wxCmdLineParser() { Init(); }
 105     wxCmdLineParser(int argc, char **argv) { Init(); SetCmdLine(argc, argv); }
 106 #if wxUSE_UNICODE
 107     wxCmdLineParser(int argc, wxChar **argv) { Init(); SetCmdLine(argc, argv); }
 108     wxCmdLineParser(int argc, const wxCmdLineArgsArray& argv)
 109         { Init(); SetCmdLine(argc, argv); }
 110 #endif // wxUSE_UNICODE
 111     wxCmdLineParser(const wxString& cmdline) { Init(); SetCmdLine(cmdline); }
 112
 113     // the same as above, but also gives the cmd line description - otherwise,
 114     // use AddXXX() later
 115     wxCmdLineParser(const wxCmdLineEntryDesc *desc)
 116         { Init(); SetDesc(desc); }
 117     wxCmdLineParser(const wxCmdLineEntryDesc *desc, int argc, char **argv)
 118         { Init(); SetCmdLine(argc, argv); SetDesc(desc); }
 119 #if wxUSE_UNICODE
 120     wxCmdLineParser(const wxCmdLineEntryDesc *desc, int argc, wxChar **argv)
 121         { Init(); SetCmdLine(argc, argv); SetDesc(desc); }
 122     wxCmdLineParser(const wxCmdLineEntryDesc *desc,
 123                     int argc,
 124                     const wxCmdLineArgsArray& argv)
 125         { Init(); SetCmdLine(argc, argv); SetDesc(desc); }
 126 #endif // wxUSE_UNICODE
 127     wxCmdLineParser(const wxCmdLineEntryDesc *desc, const wxString& cmdline)
 128         { Init(); SetCmdLine(cmdline); SetDesc(desc); }
 129
 130     // set cmd line to parse after using one of the ctors which don't do it
 131     void SetCmdLine(int argc, char **argv);
 132 #if wxUSE_UNICODE
 133     void SetCmdLine(int argc, wxChar **argv);
 134     void SetCmdLine(int argc, const wxCmdLineArgsArray& argv);
 135 #endif // wxUSE_UNICODE
 136     void SetCmdLine(const wxString& cmdline);
 137
 138     // not virtual, don't use this class polymorphically
 139     ~wxCmdLineParser();
 140
 141     // set different parser options
 142     // ----------------------------
 143
 144     // by default, '-' is switch char under Unix, '-' or '/' under Win:
 145     // switchChars contains all characters with which an option or switch may
 146     // start
 147     void SetSwitchChars(const wxString& switchChars);
 148
 149     // long options are not POSIX-compliant, this option allows to disable them
 150     void EnableLongOptions(bool enable = true);
 151     void DisableLongOptions() { EnableLongOptions(false); }
 152
 153     bool AreLongOptionsEnabled() const;
 154
 155     // extra text may be shown by Usage() method if set by this function
 156     void SetLogo(const wxString& logo);
 157
 158     // construct the cmd line description
 159     // ----------------------------------
 160
 161     // take the cmd line description from the wxCMD_LINE_NONE terminated table
 162     void SetDesc(const wxCmdLineEntryDesc *desc);
 163
 164     // a switch: i.e. an option without value
 165     void AddSwitch(const wxString& name, const wxString& lng = wxEmptyString,
 166                    const wxString& desc = wxEmptyString,
 167                    int flags = 0);
 168
 169     // an option taking a value of the given type
 170     void AddOption(const wxString& name, const wxString& lng = wxEmptyString,
 171                    const wxString& desc = wxEmptyString,
 172                    wxCmdLineParamType type = wxCMD_LINE_VAL_STRING,
 173                    int flags = 0);
 174
 175     // a parameter
 176     void AddParam(const wxString& desc = wxEmptyString,
 177                   wxCmdLineParamType type = wxCMD_LINE_VAL_STRING,
 178                   int flags = 0);
 179
 180     // actions
 181     // -------
 182
 183     // parse the command line, return 0 if ok, -1 if "-h" or "--help" option
 184     // was encountered and the help message was given or a positive value if a
 185     // syntax error occurred
 186     //
 187     // if showUsage is true, Usage() is called in case of syntax error or if
 188     // help was requested
 189     int Parse(bool showUsage = true);
 190
 191     // give the usage message describing all program options
 192     void Usage() const;
 193
 194     // get the command line arguments
 195     // ------------------------------
 196
 197     // returns true if the given switch was found
 198     bool Found(const wxString& name) const;
 199
 200     // returns true if an option taking a string value was found and stores the
 201     // value in the provided pointer
 202     bool Found(const wxString& name, wxString *value) const;
 203
 204     // returns true if an option taking an integer value was found and stores
 205     // the value in the provided pointer
 206     bool Found(const wxString& name, long *value) const;
 207
 208 #if wxUSE_DATETIME
 209     // returns true if an option taking a date value was found and stores the
 210     // value in the provided pointer
 211     bool Found(const wxString& name, wxDateTime *value) const;
 212 #endif // wxUSE_DATETIME
 213
 214     // gets the number of parameters found
 215     size_t GetParamCount() const;
 216
 217     // gets the value of Nth parameter (as string only for now)
 218     wxString GetParam(size_t n = 0u) const;
 219
 220     // Resets switches and options
 221     void Reset();
 222
 223     // break down the command line in arguments
 224     static wxArrayString ConvertStringToArgs(const wxString& cmdline);
 225
 226 private:
 227     // get usage string
 228     wxString GetUsageString() const;
 229
 230     // common part of all ctors
 231     void Init();
 232
 233     struct wxCmdLineParserData *m_data;
 234
 235     DECLARE_NO_COPY_CLASS(wxCmdLineParser)
 236 };
 237
 238 #else // !wxUSE_CMDLINE_PARSER
 239
 240 // this function is always available (even if !wxUSE_CMDLINE_PARSER) because it
 241 // is used by wxWin itself under Windows
 242 class WXDLLIMPEXP_BASE wxCmdLineParser
 243 {
 244 public:
 245     static wxArrayString ConvertStringToArgs(const wxString& cmdline);
 246 };
 247
 248 #endif // wxUSE_CMDLINE_PARSER/!wxUSE_CMDLINE_PARSER
 249
 250 #endif // _WX_CMDLINE_H_
 251