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