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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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4
range.c
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@ -1360,14 +1360,14 @@ static char *interpret_move(const game_state *state, game_ui *ui,
else if (do_post)
return nfmtstr(40, "W,%d,%d", ui->r, ui->c);
else
return "";
return UI_UPDATE;
} else if (!out_of_bounds(ui->r + dr[i], ui->c + dc[i], w, h)) {
ui->r += dr[i];
ui->c += dc[i];
}
} else ui->cursor_show = TRUE;
return "";
return UI_UPDATE;
}
if (action == hint) {