/*      $NetBSD: option.h,v 1.5 2023/10/06 05:49:49 simonb Exp $        */

/*
* Copyright (C) 1984-2023  Mark Nudelman
*
* You may distribute under the terms of either the GNU General Public
* License or the Less License, as specified in the README file.
*
* For more information, see the README file.
*/


#define END_OPTION_STRING       ('$')

/*
* Types of options.
*/
#define BOOL            01      /* Boolean option: 0 or 1 */
#define TRIPLE          02      /* Triple-valued option: 0, 1 or 2 */
#define NUMBER          04      /* Numeric option */
#define STRING          010     /* String-valued option */
#define NOVAR           020     /* No associated variable */
#define REPAINT         040     /* Repaint screen after toggling option */
#define NO_TOGGLE       0100    /* Option cannot be toggled with "-" cmd */
#define HL_REPAINT      0200    /* Repaint hilites after toggling option */
#define NO_QUERY        0400    /* Option cannot be queried with "_" cmd */
#define INIT_HANDLER    01000   /* Call option handler function at startup */

#define OTYPE           (BOOL|TRIPLE|NUMBER|STRING|NOVAR)

#define OLETTER_NONE    '\1'     /* Invalid option letter */

/*
* Argument to a handling function tells what type of activity:
*/
#define INIT    0       /* Initialization (from command line) */
#define QUERY   1       /* Query (from _ or - command) */
#define TOGGLE  2       /* Change value (from - command) */

/* Flag to toggle_option to specify how to "toggle" */
#define OPT_NO_TOGGLE   0
#define OPT_TOGGLE      1
#define OPT_UNSET       2
#define OPT_SET         3
#define OPT_NO_PROMPT   0100

/* Error code from findopt_name */
#define OPT_AMBIG       1

struct optname
{
       char *oname;            /* Long (GNU-style) option name */
       struct optname *onext;  /* List of synonymous option names */
};

#define OPTNAME_MAX     32      /* Max length of long option name */

struct loption
{
       char oletter;           /* The controlling letter (a-z) */
       struct optname *onames; /* Long (GNU-style) option name */
       int otype;              /* Type of the option */
       int odefault;           /* Default value */
       int *ovar;              /* Pointer to the associated variable */
       void (*ofunc)(int, char*); /* Pointer to special handling function */
       char *odesc[3];         /* Description of each value */
};