/*
* Try to include modifiers in the key.
* Changes "Shift-a" to 'A', "Alt-A" to 0xc0, etc.
*/
int extract_modifiers(int key, int *modp)
{
int modifiers = *modp;
if ((modifiers & MOD_MASK_SHIFT) && ASCII_ISALPHA(key)) {
key = TOUPPER_ASC(key);
modifiers &= ~MOD_MASK_SHIFT;
}
if ((modifiers & MOD_MASK_CTRL)
&& ((key >= '?' && key <= '_') || ASCII_ISALPHA(key))
) {
key = Ctrl_chr(key);
modifiers &= ~MOD_MASK_CTRL;
/* <C-@> is <Nul> */
if (key == 0)
key = K_ZERO;
}
if ((modifiers & MOD_MASK_ALT) && key < 0x80
&& !enc_dbcs /* avoid creating a lead byte */
) {
key |= 0x80;
modifiers &= ~MOD_MASK_ALT; /* remove the META modifier */
}
*modp = modifiers;
return key;
}
int name_to_mod_mask(int c)
{
c = TOUPPER_ASC(c);
for (size_t i = 0; mod_mask_table[i].mod_mask != 0; i++) {
if (c == mod_mask_table[i].name) {
return mod_mask_table[i].mod_flag;
}
}
return 0;
}
/*
* Return the modifier mask bit (MOD_MASK_*) which corresponds to the given
* modifier name ('S' for Shift, 'C' for Ctrl etc).
*/
int name_to_mod_mask(int c)
{
int i;
c = TOUPPER_ASC(c);
for (i = 0; mod_mask_table[i].mod_mask != 0; i++)
if (c == mod_mask_table[i].name)
return mod_mask_table[i].mod_flag;
return 0;
}
/// Try to include modifiers (except alt/meta) in the key.
/// Changes "Shift-a" to 'A', "Ctrl-@" to <Nul>, etc.
static int extract_modifiers(int key, int *modp)
{
int modifiers = *modp;
if ((modifiers & MOD_MASK_SHIFT) && ASCII_ISALPHA(key)) {
key = TOUPPER_ASC(key);
modifiers &= ~MOD_MASK_SHIFT;
}
if ((modifiers & MOD_MASK_CTRL)
&& ((key >= '?' && key <= '_') || ASCII_ISALPHA(key))) {
key = Ctrl_chr(key);
modifiers &= ~MOD_MASK_CTRL;
if (key == 0) { // <C-@> is <Nul>
key = K_ZERO;
}
}
*modp = modifiers;
return key;
}
