New name UI_UPDATE for interpret_move's return "".

Now midend.c directly tests the returned pointer for equality to this
value, instead of checking whether it's the empty string.

A minor effect of this is that games may now return a dynamically
allocated empty string from interpret_move() and treat it as just
another legal move description. But I don't expect anyone to be
perverse enough to actually do that! The main purpose is that it
avoids returning a string literal from a function whose return type is
a pointer to _non-const_ char, i.e. we are now one step closer to
being able to make this code base clean under -Wwrite-strings.
This commit is contained in:
Simon Tatham
2017-10-01 12:52:12 +01:00
parent edcf839d4c
commit eeb2db283d
41 changed files with 217 additions and 201 deletions

View File

@ -1425,7 +1425,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
ui->hshow = 1;
}
ui->hcursor = 0;
return "";
return UI_UPDATE;
}
if (button == RIGHT_BUTTON) {
/* pencil highlighting for non-filled squares */
@ -1439,7 +1439,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
ui->hshow = 1;
}
ui->hcursor = 0;
return "";
return UI_UPDATE;
}
}
@ -1453,11 +1453,12 @@ static char *interpret_move(const game_state *state, game_ui *ui,
ny != ui->hy + adjthan[i].dy); ++i);
if (i == 4)
return ""; /* invalid direction, i.e. out of the board */
return UI_UPDATE; /* invalid direction, i.e. out of
* the board */
if (!(GRID(state, flags, ui->hx, ui->hy) & adjthan[i].f ||
GRID(state, flags, nx, ny ) & adjthan[i].fo))
return ""; /* no clue to toggle */
return UI_UPDATE; /* no clue to toggle */
if (state->adjacent)
self = (adjthan[i].dx >= 0 && adjthan[i].dy >= 0);
@ -1475,13 +1476,13 @@ static char *interpret_move(const game_state *state, game_ui *ui,
} else {
move_cursor(button, &ui->hx, &ui->hy, ds->order, ds->order, FALSE);
ui->hshow = ui->hcursor = 1;
return "";
return UI_UPDATE;
}
}
if (ui->hshow && IS_CURSOR_SELECT(button)) {
ui->hpencil = 1 - ui->hpencil;
ui->hcursor = 1;
return "";
return UI_UPDATE;
}
n = c2n(button, state->order);