contrib/ncurses-5.4/ncurses/base/keyok.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
  31  ****************************************************************************/
  32
  33 #include <curses.priv.h>
  34
  35 MODULE_ID("$Id: keyok.c,v 1.5 2000/12/10 02:43:26 tom Exp $")
  36
  37 /*
  38  * Enable (or disable) ncurses' interpretation of a keycode by adding (or
  39  * removing) the corresponding 'tries' entry.
  40  *
  41  * Do this by storing a second tree of tries, which records the disabled keys.
  42  * The simplest way to copy is to make a function that returns the string (with
  43  * nulls set to 0200), then use that to reinsert the string into the
  44  * corresponding tree.
  45  */
  46
  47 NCURSES_EXPORT(int)
  48 keyok(int c, bool flag)
  49 {
  50     int code = ERR;
  51     int count = 0;
  52     char *s;
  53
  54     T((T_CALLED("keyok(%d,%d)"), c, flag));
  55     if (flag) {
  56         while ((s = _nc_expand_try(SP->_key_ok, c, &count, 0)) != 0
  57                && _nc_remove_key(&(SP->_key_ok), c)) {
  58             _nc_add_to_try(&(SP->_keytry), s, c);
  59             free(s);
  60             code = OK;
  61             count = 0;
  62         }
  63     } else {
  64         while ((s = _nc_expand_try(SP->_keytry, c, &count, 0)) != 0
  65                && _nc_remove_key(&(SP->_keytry), c)) {
  66             _nc_add_to_try(&(SP->_key_ok), s, c);
  67             free(s);
  68             code = OK;
  69             count = 0;
  70         }
  71     }
  72     returnCode(code);
  73 }