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