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New name UI_UPDATE for interpret_move's return "".

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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
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8
solo.c
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@ -4586,7 +4586,7 @@ static char *interpret_move(const game_state *state, game_ui *ui,
ui->hpencil = 0;
}
ui->hcursor = 0;
return ""; /* UI activity occurred */
return UI_UPDATE;
}
if (button == RIGHT_BUTTON) {
/*
@ -4606,19 +4606,19 @@ static char *interpret_move(const game_state *state, game_ui *ui,
ui->hshow = 0;
}
ui->hcursor = 0;
return ""; /* UI activity occurred */
return UI_UPDATE;
}
}
if (IS_CURSOR_MOVE(button)) {
move_cursor(button, &ui->hx, &ui->hy, cr, cr, 0);
ui->hshow = ui->hcursor = 1;
return "";
return UI_UPDATE;
}
if (ui->hshow &&
(button == CURSOR_SELECT)) {
ui->hpencil = 1 - ui->hpencil;
ui->hcursor = 1;
return "";
return UI_UPDATE;
}
if (ui->hshow &&