changelog: document last change

[sgt-puzzles.git] / lightup.c

diff --git a/lightup.c b/lightup.c
index 9131428313dc4f95c01b2216a12a9a0e5e5819d9..4dd46c8392eec7111297628b7e6e292340ab086c 100644 (file)
--- a/lightup.c
+++ b/lightup.c
@@ -157,7 +157,8 @@ typedef struct {
 
 /* Fills in (doesn't allocate) a surrounds structure with the grid locations
  * around a given square, taking account of the edges. */
-static void get_surrounds(game_state *state, int ox, int oy, surrounds *s)
+static void get_surrounds(const game_state *state, int ox, int oy,
+                          surrounds *s)
 {
     assert(ox >= 0 && ox < state->w && oy >= 0 && oy < state->h);
     s->npoints = 0;
@@ -229,7 +230,7 @@ static void free_params(game_params *params)
     sfree(params);
 }
 
-static game_params *dup_params(game_params *params)
+static game_params *dup_params(const game_params *params)
 {
     game_params *ret = snew(game_params);
     *ret = *params;                   /* structure copy */
@@ -273,7 +274,7 @@ static void decode_params(game_params *params, char const *string)
     }
 }
 
-static char *encode_params(game_params *params, int full)
+static char *encode_params(const game_params *params, int full)
 {
     char buf[80];
 
@@ -288,7 +289,7 @@ static char *encode_params(game_params *params, int full)
     return dupstr(buf);
 }
 
-static config_item *game_configure(game_params *params)
+static config_item *game_configure(const game_params *params)
 {
     config_item *ret;
     char buf[80];
@@ -333,7 +334,7 @@ static config_item *game_configure(game_params *params)
     return ret;
 }
 
-static game_params *custom_params(config_item *cfg)
+static game_params *custom_params(const config_item *cfg)
 {
     game_params *ret = snew(game_params);
 
@@ -346,7 +347,7 @@ static game_params *custom_params(config_item *cfg)
     return ret;
 }
 
-static char *validate_params(game_params *params, int full)
+static char *validate_params(const game_params *params, int full)
 {
     if (params->w < 2 || params->h < 2)
         return "Width and height must be at least 2";
@@ -367,7 +368,7 @@ static char *validate_params(game_params *params, int full)
 
 /* --- Game state construction/freeing helper functions --- */
 
-static game_state *new_state(game_params *params)
+static game_state *new_state(const game_params *params)
 {
     game_state *ret = snew(game_state);
 
@@ -382,7 +383,7 @@ static game_state *new_state(game_params *params)
     return ret;
 }
 
-static game_state *dup_game(game_state *state)
+static game_state *dup_game(const game_state *state)
 {
     game_state *ret = snew(game_state);
 
@@ -479,7 +480,7 @@ static int grid_overlap(game_state *state)
     return 0;
 }
 
-static int number_wrong(game_state *state, int x, int y)
+static int number_wrong(const game_state *state, int x, int y)
 {
     surrounds s;
     int i, n, empty, lights = GRID(state, lights, x, y);
@@ -568,7 +569,8 @@ static void clean_board(game_state *state, int leave_blacks)
     state->nlights = 0;
 }
 
-static void set_blacks(game_state *state, game_params *params, random_state *rs)
+static void set_blacks(game_state *state, const game_params *params,
+                       random_state *rs)
 {
     int x, y, degree = 0, rotate = 0, nblack;
     int rh, rw, i;
@@ -1516,9 +1518,11 @@ static int puzzle_is_good(game_state *state, int difficulty)
 
 #define MAX_GRIDGEN_TRIES 20
 
-static char *new_game_desc(game_params *params, random_state *rs,
+static char *new_game_desc(const game_params *params_in, random_state *rs,
                           char **aux, int interactive)
 {
+    game_params params_copy = *params_in; /* structure copy */
+    game_params *params = &params_copy;
     game_state *news = new_state(params), *copys;
     int i, j, run, x, y, wh = params->w*params->h, num;
     char *ret, *p;
@@ -1625,7 +1629,7 @@ goodpuzzle:
     return ret;
 }
 
-static char *validate_desc(game_params *params, char *desc)
+static char *validate_desc(const game_params *params, const char *desc)
 {
     int i;
     for (i = 0; i < params->w*params->h; i++) {
@@ -1647,7 +1651,8 @@ static char *validate_desc(game_params *params, char *desc)
     return NULL;
 }
 
-static game_state *new_game(midend *me, game_params *params, char *desc)
+static game_state *new_game(midend *me, const game_params *params,
+                            const char *desc)
 {
     game_state *ret = new_state(params);
     int x,y;
@@ -1694,8 +1699,8 @@ static game_state *new_game(midend *me, game_params *params, char *desc)
     return ret;
 }
 
-static char *solve_game(game_state *state, game_state *currstate,
-                       char *aux, char **error)
+static char *solve_game(const game_state *state, const game_state *currstate,
+                        const char *aux, char **error)
 {
     game_state *solved;
     char *move = NULL, buf[80];
@@ -1750,7 +1755,7 @@ done:
     return move;
 }
 
-static int game_can_format_as_text_now(game_params *params)
+static int game_can_format_as_text_now(const game_params *params)
 {
     return TRUE;
 }
@@ -1759,7 +1764,7 @@ static int game_can_format_as_text_now(game_params *params)
  * character per cell (like debug_state) but that comes out tiny.
  * 'L' is used for 'light here' because 'O' looks too much like '0'
  * (black square with no surrounding lights). */
-static char *game_text_format(game_state *state)
+static char *game_text_format(const game_state *state)
 {
     int w = state->w, h = state->h, W = w+1, H = h+1;
     int x, y, len, lights;
@@ -1814,7 +1819,7 @@ struct game_ui {
     int cur_x, cur_y, cur_visible;
 };
 
-static game_ui *new_ui(game_state *state)
+static game_ui *new_ui(const game_state *state)
 {
     game_ui *ui = snew(game_ui);
     ui->cur_x = ui->cur_y = ui->cur_visible = 0;
@@ -1826,19 +1831,19 @@ static void free_ui(game_ui *ui)
     sfree(ui);
 }
 
-static char *encode_ui(game_ui *ui)
+static char *encode_ui(const game_ui *ui)
 {
     /* nothing to encode. */
     return NULL;
 }
 
-static void decode_ui(game_ui *ui, char *encoding)
+static void decode_ui(game_ui *ui, const char *encoding)
 {
     /* nothing to decode. */
 }
 
-static void game_changed_state(game_ui *ui, game_state *oldstate,
-                               game_state *newstate)
+static void game_changed_state(game_ui *ui, const game_state *oldstate,
+                               const game_state *newstate)
 {
     if (newstate->completed)
         ui->cur_visible = 0;
@@ -1870,8 +1875,9 @@ struct game_drawstate {
             (pc)) -1 (nil)
         (nil))
  */
-static char *interpret_move(game_state *state, game_ui *ui, const game_drawstate *ds,
-                           int x, int y, int button)
+static char *interpret_move(const game_state *state, game_ui *ui,
+                            const game_drawstate *ds,
+                            int x, int y, int button)
 {
     enum { NONE, FLIP_LIGHT, FLIP_IMPOSSIBLE } action = NONE;
     int cx = -1, cy = -1;
@@ -1939,7 +1945,7 @@ static char *interpret_move(game_state *state, game_ui *ui, const game_drawstate
     return dupstr(buf);
 }
 
-static game_state *execute_move(game_state *state, char *move)
+static game_state *execute_move(const game_state *state, const char *move)
 {
     game_state *ret = dup_game(state);
     int x, y, n, flags;
@@ -1989,8 +1995,8 @@ badmove:
  */
 
 /* XXX entirely cloned from fifteen.c; separate out? */
-static void game_compute_size(game_params *params, int tilesize,
-                             int *x, int *y)
+static void game_compute_size(const game_params *params, int tilesize,
+                              int *x, int *y)
 {
     /* Ick: fake up `ds->tilesize' for macro expansion purposes */
     struct { int tilesize; } ads, *ds = &ads;
@@ -2001,7 +2007,7 @@ static void game_compute_size(game_params *params, int tilesize,
 }
 
 static void game_set_size(drawing *dr, game_drawstate *ds,
-                         game_params *params, int tilesize)
+                          const game_params *params, int tilesize)
 {
     ds->tilesize = tilesize;
     ds->crad = 3*(tilesize-1)/8;
@@ -2034,7 +2040,7 @@ static float *game_colours(frontend *fe, int *ncolours)
     return ret;
 }
 
-static game_drawstate *game_new_drawstate(drawing *dr, game_state *state)
+static game_drawstate *game_new_drawstate(drawing *dr, const game_state *state)
 {
     struct game_drawstate *ds = snew(struct game_drawstate);
     int i;
@@ -2064,8 +2070,8 @@ static void game_free_drawstate(drawing *dr, game_drawstate *ds)
 #define HINT_OVERLAPS
 #define HINT_NUMBERS
 
-static unsigned int tile_flags(game_drawstate *ds, game_state *state, game_ui *ui,
-                               int x, int y, int flashing)
+static unsigned int tile_flags(game_drawstate *ds, const game_state *state,
+                               const game_ui *ui, int x, int y, int flashing)
 {
     unsigned int flags = GRID(state, flags, x, y);
     int lights = GRID(state, lights, x, y);
@@ -2099,8 +2105,8 @@ static unsigned int tile_flags(game_drawstate *ds, game_state *state, game_ui *u
     return ret;
 }
 
-static void tile_redraw(drawing *dr, game_drawstate *ds, game_state *state,
-                        int x, int y)
+static void tile_redraw(drawing *dr, game_drawstate *ds,
+                        const game_state *state, int x, int y)
 {
     unsigned int ds_flags = GRID(ds, flags, x, y);
     int dx = COORD(x), dy = COORD(y);
@@ -2153,9 +2159,10 @@ static void tile_redraw(drawing *dr, game_drawstate *ds, game_state *state,
     draw_update(dr, dx, dy, TILE_SIZE, TILE_SIZE);
 }
 
-static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
-                       game_state *state, int dir, game_ui *ui,
-                       float animtime, float flashtime)
+static void game_redraw(drawing *dr, game_drawstate *ds,
+                        const game_state *oldstate, const game_state *state,
+                        int dir, const game_ui *ui,
+                        float animtime, float flashtime)
 {
     int flashing = FALSE;
     int x,y;
@@ -2189,14 +2196,14 @@ static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
     }
 }
 
-static float game_anim_length(game_state *oldstate, game_state *newstate,
-                             int dir, game_ui *ui)
+static float game_anim_length(const game_state *oldstate,
+                              const game_state *newstate, int dir, game_ui *ui)
 {
     return 0.0F;
 }
 
-static float game_flash_length(game_state *oldstate, game_state *newstate,
-                              int dir, game_ui *ui)
+static float game_flash_length(const game_state *oldstate,
+                               const game_state *newstate, int dir, game_ui *ui)
 {
     if (!oldstate->completed && newstate->completed &&
         !oldstate->used_solve && !newstate->used_solve)
@@ -2204,17 +2211,17 @@ static float game_flash_length(game_state *oldstate, game_state *newstate,
     return 0.0F;
 }
 
-static int game_status(game_state *state)
+static int game_status(const game_state *state)
 {
     return state->completed ? +1 : 0;
 }
 
-static int game_timing_state(game_state *state, game_ui *ui)
+static int game_timing_state(const game_state *state, game_ui *ui)
 {
     return TRUE;
 }
 
-static void game_print_size(game_params *params, float *x, float *y)
+static void game_print_size(const game_params *params, float *x, float *y)
 {
     int pw, ph;
 
@@ -2226,7 +2233,7 @@ static void game_print_size(game_params *params, float *x, float *y)
     *y = ph / 100.0F;
 }
 
-static void game_print(drawing *dr, game_state *state, int tilesize)
+static void game_print(drawing *dr, const game_state *state, int tilesize)
 {
     int w = state->w, h = state->h;
     int ink = print_mono_colour(dr, 0);
@@ -2283,7 +2290,7 @@ static void game_print(drawing *dr, game_state *state, int tilesize)
 const struct game thegame = {
     "Light Up", "games.lightup", "lightup",
     default_params,
-    game_fetch_preset,
+    game_fetch_preset, NULL,
     decode_params,
     encode_params,
     free_params,