From eeb2db283de9115f7256fa4cc49597d63e06b0ab Mon Sep 17 00:00:00 2001 From: Simon Tatham Date: Sun, 1 Oct 2017 12:52:12 +0100 Subject: 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. --- puzzles.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'puzzles.h') diff --git a/puzzles.h b/puzzles.h index 47c164c..f43ee83 100644 --- a/puzzles.h +++ b/puzzles.h @@ -684,6 +684,14 @@ extern const int gamecount; extern const game thegame; #endif +/* + * Special string value to return from interpret_move in the case + * where the game UI has been updated but no actual move is being + * appended to the undo chain. Must be declared as a non-const char, + * but should never actually be modified by anyone. + */ +extern char UI_UPDATE[]; + /* A little bit of help to lazy developers */ #define DEFAULT_STATUSBAR_TEXT "Use status_bar() to fill this in." -- cgit v1.1