flower/include/getopt-long.hh

   1 #ifndef GETOPT_LONG_HH
   2 #define GETOPT_LONG_HH
   3
   4 #include <cstdio>
   5
   6 #include "std-string.hh"
   7
   8 /**
   9    a struct this for initialising the commandline options.
  10 */
  11 struct Long_option_init
  12 {
  13   char const *take_arg_str0_;
  14   char const *longname_str0_;
  15
  16   /*
  17     = 0: don't take short version.
  18   */
  19   char shortname_char_;
  20
  21   char const *help_str0_;
  22
  23   string to_string () const;
  24   string str_for_help () const;
  25   //   NO constructor!
  26
  27   static int compare (Long_option_init const &, Long_option_init const &);
  28   static string table_string (Long_option_init *);
  29 };
  30
  31 /** C++ for version of long_getopt.  For processing GNU style command
  32     line arguments.  No pointer (return values, arguments) contents are
  33     copied.
  34
  35     TODO: handle
  36     command  - , and command --
  37
  38     argument reordering
  39 */
  40 class Getopt_long
  41 {
  42
  43   /// the option info.
  44   const Long_option_init *option_a_;
  45   int table_len_;
  46
  47   /// if doing short option, arg_value_char_a_a_[optind][optindind] is processed next.
  48   int argument_index_;
  49
  50   /// the option found
  51   const Long_option_init *found_option_;
  52
  53 public:
  54   /** errorcodes: no error, argument expected, no argument expected,
  55       unknown option, illegal argument (eg. int expected).  */
  56   enum Errorcod { E_NOERROR = 0, E_ARGEXPECT, E_NOARGEXPECT, E_UNKNOWNOPTION,
  57                   E_ILLEGALARG };
  58
  59   /// argument. Set to 0 if not present
  60   char const *optional_argument_str0_;
  61
  62   /// current error status
  63   Errorcod error_;
  64
  65   /// arg_value_char_a_a_[array_index_] will be processed next.
  66   int array_index_;
  67
  68   /// the arguments
  69   char **arg_value_char_a_a_;
  70
  71   /// the arg. count
  72   int argument_count_;
  73
  74   FILE *error_out_;
  75
  76 public:
  77   /// get ready for processing next error.
  78   void next ();
  79   const Long_option_init *parselong ();
  80   const Long_option_init *parseshort ();
  81   void OK () const;
  82   bool ok () const;
  83
  84   /// report an error and abort
  85   void report (Errorcod c);
  86
  87   /// return an integer (with err. detect)
  88   long get_argument_index ();
  89
  90   /**
  91      What to do with  errors.
  92      report messages on  #*os#, and abort.
  93      if #os# is null, then do not report nor abort, just set #error#
  94   */
  95
  96   void seterror (FILE *os);
  97
  98   /// construct: pass arguments and option info.
  99   Getopt_long (int c, char **v, Long_option_init *lo);
 100
 101   /**  get the next option.
 102        @return pointer to next option found.
 103        0 if error occurred, or next argument is no option.
 104   */
 105   const Long_option_init *operator () ();
 106
 107   char const *current_arg ();
 108   char const *get_next_arg ();
 109 };
 110
 111 #endif // GETOPT_LONG_HH