contrib/less/option.h

   1 /*
   2  * Copyright (C) 1984-2008  Mark Nudelman
   3  *
   4  * You may distribute under the terms of either the GNU General Public
   5  * License or the Less License, as specified in the README file.
   6  *
   7  * For more information about less, or for information on how to
   8  * contact the author, see the README file.
   9  */
  10
  11
  12 #define END_OPTION_STRING       ('$')
  13
  14 /*
  15  * Types of options.
  16  */
  17 #define BOOL            01      /* Boolean option: 0 or 1 */
  18 #define TRIPLE          02      /* Triple-valued option: 0, 1 or 2 */
  19 #define NUMBER          04      /* Numeric option */
  20 #define STRING          010     /* String-valued option */
  21 #define NOVAR           020     /* No associated variable */
  22 #define REPAINT         040     /* Repaint screen after toggling option */
  23 #define NO_TOGGLE       0100    /* Option cannot be toggled with "-" cmd */
  24 #define HL_REPAINT      0200    /* Repaint hilites after toggling option */
  25 #define NO_QUERY        0400    /* Option cannot be queried with "_" cmd */
  26 #define INIT_HANDLER    01000   /* Call option handler function at startup */
  27
  28 #define OTYPE           (BOOL|TRIPLE|NUMBER|STRING|NOVAR)
  29
  30 /*
  31  * Argument to a handling function tells what type of activity:
  32  */
  33 #define INIT    0       /* Initialization (from command line) */
  34 #define QUERY   1       /* Query (from _ or - command) */
  35 #define TOGGLE  2       /* Change value (from - command) */
  36
  37 /* Flag to toggle_option to specify how to "toggle" */
  38 #define OPT_NO_TOGGLE   0
  39 #define OPT_TOGGLE      1
  40 #define OPT_UNSET       2
  41 #define OPT_SET         3
  42 #define OPT_NO_PROMPT   0100
  43
  44 /* Error code from findopt_name */
  45 #define OPT_AMBIG       1
  46
  47 struct optname
  48 {
  49         char *oname;            /* Long (GNU-style) option name */
  50         struct optname *onext;  /* List of synonymous option names */
  51 };
  52
  53 struct loption
  54 {
  55         char oletter;           /* The controlling letter (a-z) */
  56         struct optname *onames; /* Long (GNU-style) option name */
  57         int otype;              /* Type of the option */
  58         int odefault;           /* Default value */
  59         int *ovar;              /* Pointer to the associated variable */
  60         void (*ofunc)();        /* Pointer to special handling function */
  61         char *odesc[3];         /* Description of each value */
  62 };
  63