flower/lgetopt.hh

   1 #ifndef LGETOPT_HH
   2 #define LGETOPT_HH
   3
   4 #include <string.h>
   5
   6
   7 class ostream;
   8
   9 struct long_option_init {
  10     bool take_arg;
  11     const char* longname;
  12     char        shortname;
  13
  14     ostream &printon(ostream &errorout);
  15 };
  16
  17
  18 /** C++ for version of long_getopt.  For processing GNU style command
  19   line arguments.  No pointer (return values, arguments) contents are
  20   copied.  */
  21 class Getopt_long {
  22 public:
  23     /** errorcodes: no error, argument expected, no argument expected,
  24       unknown option, illegal argument (eg. int expected).  */
  25     enum Errorcod { E_NOERROR = 0, E_ARGEXPECT, E_NOARGEXPECT, E_UNKNOWNOPTION,
  26                 E_ILLEGALARG } ;
  27
  28
  29 private:
  30
  31     /// the option info.
  32     long_option_init *the_opts;
  33     int table_len;
  34
  35     /// if doing short option, argv[optind][optindind] is processed next.
  36     int optindind;
  37
  38     /// the option found
  39     long_option_init *beet;
  40
  41     /// get ready for processing next error.
  42     bool next();
  43     long_option_init *parselong();
  44     long_option_init *parseshort();
  45
  46     ostream *errorout;
  47
  48     /// report an error and abort
  49     void report(Errorcod c);
  50 public:
  51     /**  what to do with  errors.
  52        report messages on  #*os#, and abort.
  53        if #os# is null, then do not report nor abort, just set #error#
  54       */
  55
  56     void seterror(ostream *os);
  57     /// argument. Set to 0 if not present
  58     char* optarg;
  59
  60
  61     /// return an integer (with err. detect)
  62     long intarg();
  63     /// argv[optind] will be processed next.
  64     int optind;
  65
  66     /// the arguments
  67     char **argv;
  68
  69     /// the arg. count
  70     int argc;
  71
  72     /// construct: pass arguments and option info.
  73     Getopt_long(int c,  char **v, long_option_init *lo);
  74
  75     /**  get the next option.
  76       @return pointer to next option found.
  77       0 if error occurred, or next argument is no option.
  78       */
  79     long_option_init *operator()();
  80
  81     char *current_arg();
  82     char * get_next_arg();
  83     Errorcod error;
  84 };
  85 #endif