apt-pkg/contrib/cmndline.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: cmndline.h,v 1.7 1999/10/31 06:32:28 jgg Exp $
   4 /* ######################################################################
   5
   6    Command Line Class - Sophisticated command line parser
   7
   8    This class provides a unified command line parser/option handliner/
   9    configuration mechanism. It allows the caller to specify the option
  10    set and map the option set into the configuration class or other
  11    special functioning.
  12
  13    Filenames are stripped from the option stream and put into their
  14    own array.
  15
  16    The argument descriptor array can be initialized as:
  17
  18  CommandLine::Args Args[] =
  19  {{'q',"quiet","apt::get::quiet",CommandLine::IntLevel},
  20   {0,0,0,0}};
  21
  22    The flags mean,
  23      HasArg - Means the argument has a value
  24      IntLevel - Means the argument is an integer level indication, the
  25                 following -qqqq (+3) -q5 (=5) -q=5 (=5) are valid
  26      Boolean  - Means it is true/false or yes/no.
  27                 -d (true) --no-d (false) --yes-d (true)
  28                 --long (true) --no-long (false) --yes-long (true)
  29                 -d=yes (true) -d=no (false) Words like enable, disable,
  30                 true false, yes no and on off are recognized in logical
  31                 places.
  32      InvBoolean - Same as boolean but the case with no specified sense
  33                   (first case) is set to false.
  34      ConfigFile - Means this flag should be interprited as the name of
  35                   a config file to read in at this point in option processing.
  36                   Implies HasArg.
  37      ArbItem    - Means the item is an arbitary configuration string of
  38                   the form item=value, where item is passed directly
  39                   to the configuration class.
  40    The default, if the flags are 0 is to use Boolean
  41
  42    ##################################################################### */
  43                                                                         /*}}}*/
  44 #ifndef PKGLIB_CMNDLINE_H
  45 #define PKGLIB_CMNDLINE_H
  46
  47
  48
  49 #include <apt-pkg/configuration.h>
  50
  51 class CommandLine
  52 {
  53    public:
  54    struct Args;
  55    struct Dispatch;
  56
  57    protected:
  58
  59    Args *ArgList;
  60    Configuration *Conf;
  61    bool HandleOpt(int &I,int argc,const char *argv[],
  62                   const char *&Opt,Args *A,bool PreceedeMatch = false);
  63
  64    public:
  65
  66    enum AFlags
  67    {
  68       HasArg = (1 << 0),
  69       IntLevel = (1 << 1),
  70       Boolean = (1 << 2),
  71       InvBoolean = (1 << 3),
  72       ConfigFile = (1 << 4) | HasArg,
  73       ArbItem = (1 << 5) | HasArg
  74    };
  75
  76    const char **FileList;
  77
  78    bool Parse(int argc,const char **argv);
  79    void ShowHelp();
  80    unsigned int FileSize() const;
  81    bool DispatchArg(Dispatch *List,bool NoMatch = true);
  82
  83    CommandLine(Args *AList,Configuration *Conf);
  84    ~CommandLine();
  85 };
  86
  87 struct CommandLine::Args
  88 {
  89    char ShortOpt;
  90    const char *LongOpt;
  91    const char *ConfName;
  92    unsigned long Flags;
  93
  94    inline bool end() {return ShortOpt == 0 && LongOpt == 0;};
  95    inline bool IsBoolean() {return Flags == 0 || (Flags & (Boolean|InvBoolean)) != 0;};
  96 };
  97
  98 struct CommandLine::Dispatch
  99 {
 100    const char *Match;
 101    bool (*Handler)(CommandLine &);
 102 };
 103
 104 #endif