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Filename : my_getopt.h
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	/*
   Copyright (c) 2002, 2023, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef _my_getopt_h
#define _my_getopt_h

#include "my_sys.h"                             /* loglevel */

C_MODE_START

#define GET_NO_ARG     1
#define GET_BOOL       2
#define GET_INT        3
#define GET_UINT       4
#define GET_LONG       5
#define GET_ULONG      6
#define GET_LL         7
#define GET_ULL        8
#define GET_STR        9
#define GET_STR_ALLOC 10
#define GET_DISABLED  11
#define GET_ENUM      12
#define GET_SET       13
#define GET_DOUBLE    14
#define GET_FLAGSET   15
#define GET_PASSWORD  16

#if SIZEOF_INT == 4
#define GET_INT32 GET_INT
#define GET_UINT32 GET_UINT
#elif SIZEOF_LONG == 4
#define GET_INT32 GET_LONG
#define GET_UINT32 GET_ULONG
#else
#error Neither int or long is of 4 bytes width
#endif

#define GET_ASK_ADDR	 128
#define GET_TYPE_MASK	 127

/**
  Enumeration of the my_option::arg_type attributes.
  It should be noted that for historical reasons variables with the combination
  arg_type=NO_ARG, my_option::var_type=GET_BOOL still accepts
  arguments. This is someone counter intuitive and care should be taken
  if the code is refactored.
*/
enum get_opt_arg_type { NO_ARG, OPT_ARG, REQUIRED_ARG };

struct st_typelib;

struct my_option
{
  const char *name;                     /**< Name of the option. name=NULL
                                           marks the end of the my_option[]
                                           array.
                                         */
  int        id;                        /**< For 0<id<=255 it's means one
                                           character for a short option
                                           (like -A), if >255 no short option
                                           is created, but a long option still
                                           can be identified uniquely in the
                                           my_get_one_option() callback.
                                           If an opton needs neither special
                                           treatment in the my_get_one_option()
                                           nor one-letter short equivalent
                                           use id=0.
                                           id=-1 is a special case and is used
                                           to generate deprecation warnings for
                                           plugin options. It should not be
                                           used for anything else.
                                         */
  const char *comment;                  /**< option comment, for autom. --help.
                                           if it's NULL the option is not
                                           visible in --help.
                                         */
  void       *value;                    /**< A pointer to the variable value */
  void       *u_max_value;              /**< The user def. max variable value */
  struct st_typelib *typelib;           /**< Pointer to possible values */
  ulong     var_type;                   /**< GET_BOOL, GET_ULL, etc */
  enum get_opt_arg_type arg_type;       /**< e.g. REQUIRED_ARG or OPT_ARG */
  longlong   def_value;                 /**< Default value */
  longlong   min_value;                 /**< Min allowed value (for numbers) */
  ulonglong  max_value;                 /**< Max allowed value (for numbers) */
  longlong   sub_size;                  /**< Unused                          */
  long       block_size;                /**< Value should be a mult. of this (for numbers) */
  void       *app_type;                 /**< To be used by an application */
};


typedef my_bool (*my_get_one_option)(int, const struct my_option *, char *);
/**
  Used to retrieve a reference to the object (variable) that holds the value
  for the given option. For example, if var_type is GET_UINT, the function
  must return a pointer to a variable of type uint. A argument is stored in
  the location pointed to by the returned pointer.
*/
typedef void *(*my_getopt_value)(const char *, size_t, const struct my_option *,
                                 int *);


extern char *disabled_my_option;
extern my_bool my_getopt_print_errors;
extern my_bool my_getopt_skip_unknown;
extern my_error_reporter my_getopt_error_reporter;

extern int handle_options (int *argc, char ***argv, 
			   const struct my_option *longopts, my_get_one_option);
extern int my_handle_options (int *argc, char ***argv,
                              const struct my_option *longopts,
                              my_get_one_option,
                              const char **command_list, my_bool ignore_unknown_option);
extern void print_cmdline_password_warning();
extern void my_cleanup_options(const struct my_option *options);
extern void my_cleanup_options(const struct my_option *options);
extern void my_print_help(const struct my_option *options);
extern void my_print_variables(const struct my_option *options);
extern void my_print_variables_ex(const struct my_option *options, FILE* file);
extern void my_getopt_register_get_addr(my_getopt_value);

ulonglong getopt_ull_limit_value(ulonglong num, const struct my_option *optp,
                                 my_bool *fix);
longlong getopt_ll_limit_value(longlong, const struct my_option *,
                               my_bool *fix);
double getopt_double_limit_value(double num, const struct my_option *optp,
                                 my_bool *fix);
my_bool getopt_compare_strings(const char *s, const char *t, uint length);
ulonglong max_of_int_range(int var_type);

ulonglong getopt_double2ulonglong(double);
double getopt_ulonglong2double(ulonglong);

C_MODE_END

#endif /* _my_getopt_h */