--- a/doc/docs/dev/api/core/action.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/action.md	Wed Mar 10 18:49:08 2021 +0100
@@ -41,7 +41,7 @@
 |-------------------|--------|--------------------------------------------------|
 | [data](#data)     | (+&?)  | `void *`                                         |
 | [handle](#handle) | (+?)   | `void (*)(struct action *, const union event *)` |
-| [update](#update) | (+?)   | `bool (*)(struct action *, unsigned int)`        |
+| [update](#update) | (+?)   | `int (*)(struct action *, unsigned int)`        |
 | [draw](#draw)     | (+?)   | `void (*)(struct action *)`                      |
 | [end](#end)       | (+?)   | `void (*)(struct action *)`                      |
 | [finish](#finish) | (+?)   | `void (*)(struct action *)`                      |
@@ -65,10 +65,10 @@
 #### update
 
 Update the action `self` with the `ticks` since last frame. The callback should
-return true if it is considered complete.
+return non-zero if it is considered complete.
 
 ```c
-bool (*update)(struct action *self, unsigned int ticks)
+int (*update)(struct action *self, unsigned int ticks)
 ```
 
 #### draw
@@ -140,7 +140,7 @@
 frame if it is not NULL.
 
 ```c
-bool
+int
 action_update(struct action *act, unsigned int ticks)
 ```
 
@@ -185,11 +185,11 @@
 
 ### action\_stack\_add
 
-Add the action `act` to the stack pointed by `st`. Returns true if there was
+Add the action `act` to the stack pointed by `st`. Returns -1 if there wasn't
 enough room to insert.
 
 ```c
-bool
+int
 action_stack_add(struct action_stack *st, struct action *act)
 ```
 
@@ -207,7 +207,7 @@
 Update all actions with `ticks` since last frame in the stack `st`.
 
 ```c
-bool
+int
 action_stack_update(struct action_stack *st, unsigned int ticks)
 ```
 
@@ -222,11 +222,11 @@
 
 ### action\_stack\_completed
 
-Tells if there is any pending action in the stack `st`. Returns true if there
-are no actions or if they have all completed.
+Tells if there is any pending action in the stack `st`. Returns non-zero if
+there are no actions or if they have all completed.
 
 ```c
-bool
+int
 action_stack_completed(const struct action_stack *st)
 ```
 

--- a/doc/docs/dev/api/core/alloc.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/alloc.md	Wed Mar 10 18:49:08 2021 +0100
@@ -35,9 +35,9 @@
 
 | Field               | Access | Type                                        |
 |---------------------|--------|---------------------------------------------|
-| [alloc](#alloc)     | (+?)   | `void *(*)(size_t)`               |
-| [realloc](#realloc) | (+?)   | `void *(*)(void *, size_t)`  |
-| [free](#free)       | (+?)   | `void (*)(void *)`                   |
+| [alloc](#alloc)     | (+?)   | `void *(*)(size_t)`                         |
+| [realloc](#realloc) | (+?)   | `void *(*)(void *, size_t)`                 |
+| [free](#free)       | (+?)   | `void (*)(void *)`                          |
 
 #### alloc
 
@@ -263,8 +263,8 @@
 This will effectively create a initial storage according to
 [ALLOC_POOL_INIT_DEFAULT](#alloc_pool_init_default).
 
-Returns false on errors depending on the result of the of the current
-[alloc](#alloc) function set.
+Returns -1 on error depending on the result of the of the current
+[alloc](#alloc) function set or 0 otherwise.
 
 ```c
 bool

--- a/doc/docs/dev/api/core/animation.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/animation.md	Wed Mar 10 18:49:08 2021 +0100
@@ -70,20 +70,20 @@
 
 ### animation\_completed
 
-Returns true if the animation `an` was completely shown.
+Returns non-zero if the animation `an` was completely shown.
 
 ```c
-bool
+int
 animation_completed(const struct animation *an)
 ```
 
 ### animation\_update
 
-Update the animation `an` with `ticks` since last frame. Returns true if it has
-completed.
+Update the animation `an` with `ticks` since last frame. Returns non-zero if it
+has completed.
 
 ```c
-bool
+int
 animation_update(struct animation *an, unsigned int ticks)
 ```
 
@@ -91,11 +91,13 @@
 
 Draw the animation `an` to the given `x`, `y` coordinates.
 
+Returns -1 in case of errors and 0 otherwise.
+
 !!! warning
     You must not call this function is the animation is complete.
 
 ```c
-bool
+int
 animation_draw(const struct animation *an, int x, int y)
 ```
 

--- a/doc/docs/dev/api/core/core.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/core.md	Wed Mar 10 18:49:08 2021 +0100
@@ -23,10 +23,10 @@
 platforms so make sure to not use characters that may be illegal on some
 filesystems.
 
-Returns false in case of errors.
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 core_init(const char *organization, const char *name)
 ```
 

--- a/doc/docs/dev/api/core/drawable.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/drawable.md	Wed Mar 10 18:49:08 2021 +0100
@@ -34,7 +34,7 @@
 | [data](#data)     | (+&?)  | `void *`                                    |
 | [x](#x)           | (+)    | `int`                                       |
 | [y](#y)           | (+)    | `int`                                       |
-| [update](#update) | (+?)   | `bool (*)(struct drawable *, unsigned int)` |
+| [update](#update) | (+?)   | `int (*)(struct drawable *, unsigned int)` |
 | [draw](#draw)     | (+?)   | `void (*)(struct drawable *)`               |
 | [end](#end)       | (+?)   | `void (*)(struct drawable *)`               |
 | [finish](#finish) | (+?)   | `void (*)(struct drawable *)`               |
@@ -50,10 +50,10 @@
 #### update
 
 Update the drawable `self` with the `ticks` since last frame. The callback
-should return true if it is considered complete.
+should return non-zero if it is considered complete.
 
 ```c
-bool (*update)(struct drawable *self, unsigned int ticks)
+int (*update)(struct drawable *self, unsigned int ticks)
 ```
 
 #### draw
@@ -109,7 +109,7 @@
 and `ticks` since last frame if it is not NULL.
 
 ```c
-bool
+int
 drawable_update(struct drawable *dw, unsigned int ticks)
 ```
 
@@ -154,11 +154,11 @@
 
 ### drawable\_stack\_add
 
-Add the drawable `dw` to the stack pointed by `st`. Returns true if there was
+Add the drawable `dw` to the stack pointed by `st`. Returns -1 if there wasn't
 enough room to insert.
 
 ```c
-bool
+int
 drawable_stack_add(struct drawable_stack *st, struct drawable *dw)
 ```
 
@@ -167,7 +167,7 @@
 Update all drawables with `ticks` since last frame in the stack `st`.
 
 ```c
-bool
+int
 drawable_stack_update(struct drawable_stack *st, unsigned int ticks)
 ```
 
@@ -182,11 +182,11 @@
 
 ### drawable\_stack\_completed
 
-Tells if there is any pending drawable in the stack `st`. Returns true if there
-are no drawables or if they have all completed.
+Tells if there is any pending drawable in the stack `st`. Returns non-zero if
+there are no drawables or if they have all completed.
 
 ```c
-bool
+int
 drawable_stack_completed(const struct drawable_stack *st)
 ```
 

--- a/doc/docs/dev/api/core/error.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/error.md	Wed Mar 10 18:49:08 2021 +0100
@@ -24,11 +24,11 @@
 
 ### errorf
 
-Set the global error using [printf][] format string. Also return false for
+Set the global error using [printf][] format string. Also return -1 for
 convenience.
 
 ```c
-bool
+int
 errorf(const char *fmt, ...)
 ```
 
@@ -37,7 +37,7 @@
 Similar to [errorf](#errorf) but using a `va_list` argument instead.
 
 ```c
-bool
+int
 errorva(const char *fmt, va_list ap)
 ```
 

--- a/doc/docs/dev/api/core/event.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/event.md	Wed Mar 10 18:49:08 2021 +0100
@@ -121,9 +121,9 @@
 
 ### event\_poll
 
-Fetch the next event into `ev` or return false if there are not.
+Fetch the next event into `ev` or returns 0 if there are none.
 
 ```c
-bool
+int
 event_poll(union event *ev)
 ```

--- a/doc/docs/dev/api/core/font.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/font.md	Wed Mar 10 18:49:08 2021 +0100
@@ -37,33 +37,36 @@
 
 ### font\_open
 
-Open and load `font` of the given pixel `size` from file `path`. Returns false
-on errors.
+Open and load `font` of the given pixel `size` from file `path`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 font_open(struct font *font, const char *path, unsigned int size)
 ```
 
 ### font\_openmem
 
 Open font and load `font` from the const memory buffer pointed by `buffer` and
-of size `buflen` using a pixel size of `size`. Returns false on errors.
+of size `buflen` using a pixel size of `size`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 !!! note
     The argument `buffer` must stay valid until the font is no longer used.
 
 ```c
-bool
+int
 font_openmem(struct font *font, const void *buffer, size_t buflen, unsigned int size)
 ```
 
 ### font\_ok
 
-Returns true if the `font` is properly loaded.
+Returns non-zero if the `font` is properly loaded.
 
 ```c
-bool
+int
 font_ok(const struct font *font)
 ```
 
@@ -72,11 +75,11 @@
 Render the UTF-8 `text` into the texture `tex` using the font pointed by `font`.
 The foreground `color` will be used to draw the text.
 
-Returns false in case of rendering error, in this case `tex` remains
+Returns -1 in case of rendering error, in this case `tex` remains
 uninitialized and must not be used.
 
 ```c
-bool
+int
 font_render(struct font *font, struct texture *tex, const char *text, unsigned int color)
 ```
 
@@ -94,11 +97,11 @@
 Query the dimensions that the UTF-8 `text` would require with this `font`. Store
 the dimensions into the `w`, `h` pointers which can be both NULL.
 
-Return false in case of error, in this case both `w` and `h` remain
-uninitialized and must not be used.
+Returns -1 in case of errors, in this case `w` and `h` are set to 0 if they are
+not null.
 
 ```c
-bool
+int
 font_query(const struct font *font, const char *text, unsigned int *w, unsigned int *h)
 ```
 

--- a/doc/docs/dev/api/core/game.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/game.md	Wed Mar 10 18:49:08 2021 +0100
@@ -64,12 +64,12 @@
 The state will only be effective after the next call to
 [game_update](#game_update).
 
-If argument `quick` is set to true, the state is changed immediately and the
+If argument `quick` is non-zero, the state is changed immediately and the
 current state code should immediately return.
 
 ```c
 void
-game_switch(struct state *state, bool quick)
+game_switch(struct state *state, int quick)
 ```
 
 #### game\_handle

--- a/doc/docs/dev/api/core/image.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/image.md	Wed Mar 10 18:49:08 2021 +0100
@@ -13,24 +13,23 @@
 ### image\_open
 
 Load the image from `path` on disk and convert it as a texture into `tex`.
-Returns false on errors, in this case `tex` remains uninitialized and must not
-be used.
+
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 image_open(struct texture *tex, const char *path)
 ```
 
 ### image\_openmem
 
 Load the image from memory pointed by `buffer` of size `size` and convert it as
-a texture into `tex`. Returns false on errors, in this case `tex` remains
-uninitialized and must not be used.
+a texture into `tex`.
 
 !!! note
     The argument `buffer` must stay valid until the font is no longer used.
 
 ```c
-bool
+int
 image_openmem(struct texture *tex, const void *buffer, size_t size)
 ```

--- a/doc/docs/dev/api/core/music.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/music.md	Wed Mar 10 18:49:08 2021 +0100
@@ -31,34 +31,36 @@
 
 ### music\_open
 
-Open a music file from `path` and store the result into `mus`. Returns false on
-errors, in this case `mus` remains uninitialized and must not be used.
+Open a music file from `path` and store the result into `mus`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 music_open(struct music *mus, const char *path)
 ```
 
 ### music\_openmem
 
 Open a music from the memory `buffer` of size `buffersz` and store the result
-into `mus`. Returns false on errors, in this case `mus` remains uninitialized
-and must not be used.
+into `mus`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 !!! note
     The argument `buffer` must stay valid until the music is no longer used.
 
 ```c
-bool
+int
 music_openmem(struct music *mus, const void *buffer, size_t buffersz)
 ```
 
 ### music\_ok
 
-Returns true if the music `mus` is properly initialized.
+Returns non-zero if the music `mus` is properly initialized.
 
 ```c
-bool
+int
 music_ok(const struct music *mus)
 ```
 
@@ -73,17 +75,19 @@
 current music. If the music playing is currently fading out the playback will
 not start until it has finished.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```
-bool
+int
 music_play(struct music *mus, enum music_flags flags, unsigned int fadein)
 ```
 
 ### music\_playing
 
-Returns true if a music is playing.
+Returns non-zero if a music is playing.
 
 ```c
-bool
+int
 music_playing(void)
 ```
 

--- a/doc/docs/dev/api/core/script.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/script.md	Wed Mar 10 18:49:08 2021 +0100
@@ -68,14 +68,14 @@
 
 ### script\_append
 
-Add the action `a` into the script `s`. Returns true if there was enough room
+Add the action `a` into the script `s`. Returns -1 if there wasn't enough room
 to insert.
 
 !!! note
     The argument `a` must stay valid until the script is no longer used.
 
 ```c
-bool
+int
 script_append(struct script *s, struct action *a)
 ```
 
@@ -91,10 +91,11 @@
 ### script\_update
 
 Update the current action in the script `s` with `ticks` since last frame.
-Returns true if the script completed.
+
+Returns non-zero if the script completed.
 
 ```c
-bool
+int
 script_update(struct script *s, unsigned int ticks)
 ```
 
@@ -109,10 +110,10 @@
 
 ### script\_completed
 
-Returns true if the script `s` is complete.
+Returns non-zero if the script `s` is complete.
 
 ```c
-bool
+int
 script_completed(const struct script *s)
 ```
 

--- a/doc/docs/dev/api/core/sprite.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/sprite.md	Wed Mar 10 18:49:08 2021 +0100
@@ -64,10 +64,10 @@
 
 ### sprite\_ok
 
-Returns true if the `sprite` is properly initialized.
+Returns non-zero if the `sprite` is properly initialized.
 
 ```c
-bool
+int
 sprite_ok(const struct sprite *sprite)
 ```
 
@@ -76,8 +76,10 @@
 Similar to [sprite_scale](#sprite_scale) but use sprite cell dimensions for
 scaling.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```c
-bool
+int
 sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y)
 ```
 
@@ -86,10 +88,12 @@
 Draw an individual cell from row `r` and column `c` at the coordinates `x`, `y`
 from the sprite `sprite` and scale the image to dimensions `w`, `h`.
 
+Returns -1 in case of errors and 0 otherwise.
+
 !!! caution
     Argument `r` and `c` must be out of bounds.
 
 ```c
-bool
+int
 sprite_scale(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y, unsigned int w, unsigned int h)
 ```

--- a/doc/docs/dev/api/core/sys.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/sys.md	Wed Mar 10 18:49:08 2021 +0100
@@ -33,8 +33,10 @@
 This function is automatically called from [core_init](core.md#core_init) with
 the same arguments and not necessary from the user.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```c
-bool
+int
 sys_init(const char *organization, const char *name)
 ```
 
@@ -53,11 +55,11 @@
 
 ### sys\_mkdir
 
-Create the directory `path` recursively. Returns false on errors other than
-already existing.
+Create the directory `path` recursively. Returns -1 on errors other than
+already existing or 0 otherwise.
 
 ```c
-bool
+int
 sys_mkdir(const char *path)
 ```
 

--- a/doc/docs/dev/api/core/texture.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/texture.md	Wed Mar 10 18:49:08 2021 +0100
@@ -41,20 +41,21 @@
 
 ### texture\_new
 
-Create a new texture in `tex` with `w` and `h` as dimensions. Returns false on
-errors, in this case `tex` remains uninitialized and must not be used.
+Create a new texture in `tex` with `w` and `h` as dimensions.
+
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 texture_new(struct texture *tex, unsigned int w, unsigned int h)
 ```
 
 ### texture\_ok
 
-Returns true if the texture `tex` is properly initialized.
+Returns non-zero if the texture `tex` is properly initialized.
 
 ```c
-bool
+int
 texture_ok(const struct texture *tex)
 ```
 
@@ -62,32 +63,36 @@
 
 Set the blend mode to `blend` for future blend operations for the texture `tex`.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```c
-bool
+int
 texture_set_blend_mode(struct texture *tex, enum texture_blend blend)
 ```
 
 ### texture\_set\_alpha\_mod
 
-Apply the transparency `alpha` modulation to the texture `tex`. Returns false on
-errors.
+Apply the transparency `alpha` modulation to the texture `tex`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 !!! note
     You may need to use [texture_set_blend_mode](#texture_set_blend_mode) before
     this function to work.
 
 ```c
-bool
+int
 texture_set_alpha_mod(struct texture *tex, unsigned int alpha)
 ```
 
 ### texture\_set\_color\_mod
 
-Apply the color `color` modulation to the texture `tex`. Returns false on
-errors.
+Apply the color `color` modulation to the texture `tex`.
+
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 texture_set_color_mod(struct texture *tex, unsigned long color)
 ```
 
@@ -95,8 +100,10 @@
 
 Draw whole texture `tex` at the position `x`, `y`.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```c
-bool
+int
 texture_draw(const struct texture *tex, int x, int y)
 ```
 
@@ -108,10 +115,10 @@
 `src_h` at the region `dst_x`, `dst_y`, `dst_w`, `dst_h` with an optional
 `angle`.
 
-Returns false on rendering error.
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 texture_scale(const struct texture *tex,
               int src_x,
               int src_y,

--- a/doc/docs/dev/api/core/translate.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/translate.md	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,10 @@
 Initialize native language support for the given domain `name`. Returns false on
 errors.
 
+Returns -1 in case of errors and 0 otherwise.
+
 ```c
-bool
+int
 translate_init(const char *name)
 ```
 

--- a/doc/docs/dev/api/core/window.md	Wed Mar 10 18:49:00 2021 +0100
+++ b/doc/docs/dev/api/core/window.md	Wed Mar 10 18:49:08 2021 +0100
@@ -57,10 +57,10 @@
 Open a window with dimensions `width`, `height`. The argument `title` will set
 the window title if the platform supports it.
 
-Returns false on errors, otherwise the global `window` object will be set.
+Returns -1 in case of errors and 0 otherwise.
 
 ```c
-bool
+int
 window_open(const char *title, unsigned int width, unsigned int height)
 ```
 

--- a/examples/example-action/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-action/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -62,7 +62,7 @@
 	struct action msg_act;
 	int x;
 	int y;
-	bool opened;
+	int opened;
 	struct texture image;
 	struct sprite sprite;
 	struct action event;
@@ -176,14 +176,14 @@
 	}
 };
 
-static bool
+static int
 guide_response_update(struct action *act, unsigned int ticks)
 {
 	/* Immediately return to get access to end. */
 	(void)act;
 	(void)ticks;
 
-	return true;
+	return 1;
 }
 
 static void
@@ -252,7 +252,7 @@
 static void
 guide_init(void)
 {
-	if (!image_open(&guide.image, PATH("sprites/people.png")))
+	if (image_open(&guide.image, PATH("sprites/people.png")) < 0)
 		panic();
 
 	sprite_init(&guide.sprite, &guide.image, 48, 48);
@@ -276,7 +276,7 @@
 	case EVENT_CLICKDOWN:
 		if (maths_is_boxed(chest.x, chest.y, chest.sprite.cellw, chest.sprite.cellh,
 		    ev->click.x, ev->click.y)) {
-			chest.opened = true;
+			chest.opened = 1;
 			message_action(&chest.msg, &chest.msg_act);
 			message_query(&chest.msg, NULL, &chest.msg.h);
 			action_stack_add(&modal, &chest.msg_act);
@@ -300,7 +300,7 @@
 static void
 chest_init(void)
 {
-	if (!image_open(&chest.image, PATH("sprites/chest.png")))
+	if (image_open(&chest.image, PATH("sprites/chest.png")) < 0)
 		panic();
 
 	sprite_init(&chest.sprite, &chest.image, 32, 32);
@@ -314,9 +314,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "actions") || !ui_init() || !rpg_init())
+	if (core_init("fr.malikania", "actions") < 0 || ui_init() < 0 || rpg_init() < 0)
 		panic();
-	if (!window_open("Example - Action", W, H))
+	if (window_open("Example - Action", W, H) < 0)
 		panic();
 
 	guide_init();
@@ -372,7 +372,7 @@
 	action_stack_add(&events, &chest.event);
 	action_stack_add(&events, &guide.event);
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-animation/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-animation/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -47,16 +47,16 @@
 static struct texture numbers;
 static struct animation animation;
 static struct sprite sprite;
-static bool completed = true;
+static int completed = 1;
 
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "animation") || !ui_init())
+	if (core_init("fr.malikania", "animation") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Animation", W, H))
+	if (window_open("Example - Animation", W, H) < 0)
 		panic();
-	if (!image_open(&numbers, PATH("sprites/numbers.png")))
+	if (image_open(&numbers, PATH("sprites/numbers.png")) < 0)
 		panic();
 }
 
@@ -120,7 +120,7 @@
 	sprite_init(&sprite, &numbers, 48, 48);
 	animation_init(&animation, &sprite, 1000);
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-audio/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-audio/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -56,12 +56,12 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "audio") || !ui_init())
+	if (core_init("fr.malikania", "audio") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Audio", W, H))
+	if (window_open("Example - Audio", W, H) < 0)
 		panic();
-	if (!music_open(&music, PATH("music/vabsounds-romance.ogg")) ||
-	    !sound_open(&sound, PATH("sounds/fire.wav")))
+	if (music_open(&music, PATH("music/vabsounds-romance.ogg")) < 0 ||
+	    sound_open(&sound, PATH("sounds/fire.wav")) < 0)
 		panic();
 }
 
@@ -80,7 +80,7 @@
 
 	switch (ev->type) {
 	case EVENT_CLICKDOWN:
-		if (!sound_play(&sound, -1, 0))
+		if (sound_play(&sound, -1, 0) < 0)
 			panic();
 		break;
 	case EVENT_KEYDOWN:
@@ -138,7 +138,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 
 	music_finish(&music);

--- a/examples/example-battle/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-battle/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -143,9 +143,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "battle") || !ui_init() || !rpg_init())
+	if (core_init("fr.malikania", "battle") < 0 || ui_init() < 0 || rpg_init() < 0)
 		panic();
-	if (!window_open("Example - Battle", W, H))
+	if (window_open("Example - Battle", W, H) < 0)
 		panic();
 
 	registry_init();
@@ -182,7 +182,7 @@
 	battle_start(bt);
 
 	fight_state.data = bt;
-	game_switch(&fight_state, false);
+	game_switch(&fight_state, 0);
 }
 
 
@@ -239,7 +239,7 @@
 	struct battle *bt = st->data;
 
 	if (battle_update(bt, ticks))
-		game_switch(&empty_state, false);
+		game_switch(&empty_state, 0);
 }
 
 static void
@@ -268,7 +268,7 @@
 static void
 run(void)
 {
-	game_switch(&empty_state, true);
+	game_switch(&empty_state, 1);
 	game_loop();
 }
 

--- a/examples/example-battle/registry.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-battle/registry.c	Wed Mar 10 18:49:08 2021 +0100
@@ -75,7 +75,7 @@
 	for (size_t i = 0; i < UTIL_SIZE(images); ++i) {
 		struct texture *texture = &registry_images[images[i].index];
 
-		if (!image_open(texture, PATH(images[i].path)))
+		if (image_open(texture, PATH(images[i].path)) < 0)
 			panic();
 	}
 }
@@ -87,7 +87,7 @@
 		struct texture *texture = &registry_textures[textures[i].index];
 		struct sprite *sprite = &registry_sprites[textures[i].index];
 
-		if (!image_open(texture, PATH(textures[i].path)))
+		if (image_open(texture, PATH(textures[i].path)) < 0)
 			panic();
 
 		if (textures[i].cellw == 0 || textures[i].cellh == 0)
@@ -103,7 +103,7 @@
 	for (size_t i = 0; i < UTIL_SIZE(sounds); ++i) {
 		struct sound *sound = &registry_sounds[sounds[i].index];
 
-		if (!sound_open(sound, PATH(sounds[i].path)))
+		if (sound_open(sound, PATH(sounds[i].path)) < 0)
 			panic();
 	}
 }

--- a/examples/example-battle/spell-fire.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-battle/spell-fire.c	Wed Mar 10 18:49:08 2021 +0100
@@ -39,7 +39,7 @@
 	unsigned int selection;
 };
 
-static bool
+static int
 update(struct action *act, unsigned int ticks)
 {
 	struct data *data = act->data;

--- a/examples/example-cursor/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-cursor/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -48,9 +48,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "cursor") || !ui_init())
+	if (core_init("fr.malikania", "cursor") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Cursor", W, H))
+	if (window_open("Example - Cursor", W, H) < 0)
 		panic();
 }
 
@@ -122,7 +122,7 @@
 
 	change(cursor);
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-debug/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-debug/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -38,12 +38,12 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "debug") || !ui_init())
+	if (core_init("fr.malikania", "debug") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Debug", W, H))
+	if (window_open("Example - Debug", W, H) < 0)
 		panic();
 
-	debug_options.enable = true;
+	debug_options.enable = 1;
 }
 
 static void
@@ -86,7 +86,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-drawable/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-drawable/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -70,19 +70,19 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "drawable") || !ui_init())
+	if (core_init("fr.malikania", "drawable") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Drawable", W, H))
+	if (window_open("Example - Drawable", W, H) < 0)
 		panic();
 
 	/* 0: Explosion animation. */
-	if (!image_open(&explosion_tex, PATH("sprites/explosion.png")))
+	if (image_open(&explosion_tex, PATH("sprites/explosion.png")) < 0)
 		panic();
 
 	sprite_init(&explosion_sprite, &explosion_tex, 256, 256);
 }
 
-static bool
+static int
 explosion_update(struct drawable *dw, unsigned int ticks)
 {
 	struct explosion *ex = dw->data;
@@ -177,7 +177,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-font/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-font/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -52,9 +52,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "font") || !ui_init())
+	if (core_init("fr.malikania", "font") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Font", W, H))
+	if (window_open("Example - Font", W, H) < 0)
 		panic();
 }
 
@@ -104,7 +104,7 @@
 	painter_set_color(0xffffffff);
 	painter_clear();
 
-	if (!font_render(font, &tex, "Example of text. Use <Left>/<Right> to change color and <Space> to toggle antialiasing.", colors[ci]))
+	if (font_render(font, &tex, "Example of text. Use <Left>/<Right> to change color and <Space> to toggle antialiasing.", colors[ci]) < 0)
 		panic();
 
 	texture_draw(&tex, 10, 10);
@@ -120,7 +120,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-gridmenu/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-gridmenu/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -39,9 +39,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "grid-menu") || !ui_init())
+	if (core_init("fr.malikania", "grid-menu") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Grid menu", W, H))
+	if (window_open("Example - Grid menu", W, H) < 0)
 		panic();
 }
 
@@ -123,7 +123,7 @@
 	/* Need to repaint at least once. */
 	gridmenu_repaint(&menu);
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-label/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-label/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -104,9 +104,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "label") || !ui_init())
+	if (core_init("fr.malikania", "label") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Label", W, H))
+	if (window_open("Example - Label", W, H) < 0)
 		panic();
 
 	for (size_t i = 0; i < UTIL_SIZE(table); ++i) {
@@ -167,7 +167,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-message/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-message/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -46,9 +46,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "message") || !ui_init() || !rpg_init())
+	if (core_init("fr.malikania", "message") < 0 || ui_init() < 0 || rpg_init() < 0)
 		panic();
-	if (!window_open("Example - Message", W, H))
+	if (window_open("Example - Message", W, H) < 0)
 		panic();
 }
 
@@ -102,7 +102,7 @@
 
 	message_start(msg);
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-sprite/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-sprite/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -63,11 +63,11 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "sprite") || !ui_init())
+	if (core_init("fr.malikania", "sprite") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Sprite", W, H))
+	if (window_open("Example - Sprite", W, H) < 0)
 		panic();
-	if (!image_open(&texture, PATH("sprites/people.png")))
+	if (image_open(&texture, PATH("sprites/people.png")) < 0)
 		panic();
 
 	sprite_init(&sprite, &texture, 48, 48);
@@ -136,7 +136,7 @@
 
 	changed();
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-trace/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-trace/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -38,9 +38,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "trace") || !ui_init())
+	if (core_init("fr.malikania", "trace") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - Trace", W, H))
+	if (window_open("Example - Trace", W, H) < 0)
 		panic();
 
 	trace_handler = trace_hud_handler;
@@ -101,7 +101,7 @@
 		.draw = draw
 	};
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/examples/example-ui/main.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/examples/example-ui/main.c	Wed Mar 10 18:49:08 2021 +0100
@@ -65,7 +65,7 @@
 	struct action_stack st;
 
 	struct {
-		bool active;
+		int active;
 		int x;
 		int y;
 	} motion;
@@ -129,9 +129,9 @@
 static void
 init(void)
 {
-	if (!core_init("fr.malikania", "ui") || !ui_init())
+	if (core_init("fr.malikania", "ui") < 0 || ui_init() < 0)
 		panic();
-	if (!window_open("Example - UI", W, H))
+	if (window_open("Example - UI", W, H) < 0)
 		panic();
 }
 
@@ -213,7 +213,7 @@
 	action_stack_add(&ui.st, &ui.quit.act);
 }
 
-static bool
+static int
 headerclick(int x, int y)
 {
 	return maths_is_boxed(
@@ -246,7 +246,7 @@
 		break;
 	case EVENT_CLICKDOWN:
 		if (headerclick(ev->click.x, ev->click.y)) {
-			ui.motion.active = true;
+			ui.motion.active = 1;
 			ui.motion.x = ev->click.x;
 			ui.motion.y = ev->click.y;
 			window_set_cursor(WINDOW_CURSOR_SIZE);
@@ -255,7 +255,7 @@
 			action_stack_handle(&ui.st, ev);
 		break;
 	case EVENT_CLICKUP:
-		ui.motion.active = false;
+		ui.motion.active = 0;
 		window_set_cursor(WINDOW_CURSOR_ARROW);
 		/* Fallthrough. */
 	default:
@@ -298,7 +298,7 @@
 	prepare();
 	resize();
 
-	game_switch(&state, true);
+	game_switch(&state, 1);
 	game_loop();
 }
 

--- a/libmlk-adventure/adventure/action/chest.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/action/chest.c	Wed Mar 10 18:49:08 2021 +0100
@@ -38,7 +38,7 @@
 #define H(c)            ((c)->animation.sprite->cellh)
 #define TOLERANCE       (10)
 
-static bool
+static int
 is_near(const struct chest *c)
 {
 	const int x          = c->x - c->map->player_sprite->cellw - TOLERANCE;
@@ -82,13 +82,13 @@
 	}
 }
 
-static bool
+static int
 update(struct action *act, unsigned int ticks)
 {
 	struct chest *c = act->data;
 
 	if (c->state != CHEST_STATE_ANIMATE)
-		return false;
+		return 0;
 
 	if (animation_update(&c->animation, ticks)) {
 		c->state = CHEST_STATE_OPEN;
@@ -97,7 +97,7 @@
 			c->exec(c);
 	}
 
-	return false;
+	return 0;
 }
 
 static void
@@ -130,7 +130,7 @@
 	assert(c);
 
 	if (c->save && c->property) {
-		if (!save_get_property(c->save, c->property))
+		if (save_get_property(c->save, c->property) < 0)
 			panic();
 
 		/* TODO: add an utility. */

--- a/libmlk-adventure/adventure/action/spawner.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/action/spawner.c	Wed Mar 10 18:49:08 2021 +0100
@@ -74,7 +74,7 @@
 	molko_fight(bt);
 }
 
-static bool
+static int
 update(struct action *act, unsigned int ticks)
 {
 	(void)ticks;
@@ -92,7 +92,7 @@
 		}
 	}
 
-	return false;
+	return 0;
 }
 
 void

--- a/libmlk-adventure/adventure/action/teleport.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/action/teleport.c	Wed Mar 10 18:49:08 2021 +0100
@@ -53,7 +53,7 @@
 	texture_draw(&tp->overlay, 0, 0);
 }
 
-static bool
+static int
 update_fadeout(struct action *act, unsigned int ticks)
 {
 	struct teleport *tp = act->data;
@@ -63,17 +63,17 @@
 	if (tp->elapsed >= 10) {
 		if (tp->alpha >= 255) {
 			molko_teleport(tp->destination, tp->origin_x, tp->origin_y);
-			return true;
+			return 1;
 		}
 
 		tp->elapsed = 0;
 		tp->alpha += 5;
 	}
 
-	return false;
+	return 0;
 }
 
-static bool
+static int
 update_touch(struct action *act, unsigned int ticks)
 {
 	(void)ticks;
@@ -93,14 +93,14 @@
 		 * We change our update function and add a draw function that
 		 * fade the screen out.
 		 */
-		if (!texture_new(&tp->overlay, window.w, window.h))
+		if (texture_new(&tp->overlay, window.w, window.h) < 0)
 			panic();
 
 		act->update = update_fadeout;
 		act->draw = draw;
 	}
 
-	return false;
+	return 0;
 }
 
 static void

--- a/libmlk-adventure/adventure/assets.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/assets.c	Wed Mar 10 18:49:08 2021 +0100
@@ -62,7 +62,7 @@
 init_sprites(void)
 {
 	for (size_t i = 0; i < UTIL_SIZE(table_sprites); ++i) {
-		if (!image_open(&table_sprites[i].texture, molko_path(table_sprites[i].path)))
+		if (image_open(&table_sprites[i].texture, molko_path(table_sprites[i].path)) < 0)
 			panic();
 
 		sprite_init(&assets_sprites[table_sprites[i].index],
@@ -75,7 +75,7 @@
 init_sounds(void)
 {
 	for (size_t i = 0; i < UTIL_SIZE(assets_sounds); ++i) {
-		if (!sound_open(&assets_sounds[table_sounds[i].index], molko_path(table_sounds[i].path)))
+		if (sound_open(&assets_sounds[table_sounds[i].index], molko_path(table_sounds[i].path)) < 0)
 			panic();
 	}
 }

--- a/libmlk-adventure/adventure/dialog/save.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/dialog/save.c	Wed Mar 10 18:49:08 2021 +0100
@@ -201,7 +201,7 @@
 	sprite_draw(sprite, 1, 2, x, y + (geo->saves[dlg->selected].h / 2) - (sprite->cellh / 2));
 }
 
-static bool
+static int
 handle_keydown(struct dialog_save *s, const struct event_key *key)
 {
 	assert(key->type == EVENT_KEYDOWN);
@@ -225,10 +225,10 @@
 		break;
 	}
 
-	return false;
+	return 0;
 }
 
-static bool
+static int
 handle_clickdown(struct dialog_save *s, const struct geo *geo, const struct event_click *clk)
 {
 	assert(clk->type == EVENT_CLICKDOWN);
@@ -254,7 +254,7 @@
 		save_open(&s->saves[i], i, SAVE_MODE_READ);
 }
 
-bool
+int
 dialog_save_handle(struct dialog_save *dlg, const union event *ev)
 {
 	assert(dlg);
@@ -271,7 +271,7 @@
 		break;
 	}
 
-	return false;
+	return 0;
 }
 
 void

--- a/libmlk-adventure/adventure/dialog/save.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/dialog/save.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_ADVENTURE_SAVE_H
 #define MOLKO_ADVENTURE_SAVE_H
 
-#include <stdbool.h>
-
 #include <core/core.h>
 
 #include <rpg/save.h>
@@ -42,7 +40,7 @@
 void
 dialog_save_init(struct dialog_save *);
 
-bool
+int
 dialog_save_handle(struct dialog_save *, const union event *);
 
 void

--- a/libmlk-adventure/adventure/molko.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/molko.c	Wed Mar 10 18:49:08 2021 +0100
@@ -69,12 +69,11 @@
 {
 	setlocale(LC_ALL, "");
 
-	if (!core_init("fr.malikania", "molko") || !ui_init() || !rpg_init())
+	if (core_init("fr.malikania", "molko") < 0 || ui_init() < 0|| rpg_init() < 0)
 		panic();
-
-	translate_init("libmlk-adventure");
-
-	if (!window_open("Molko's Adventure", WINDOW_WIDTH, WINDOW_HEIGHT))
+	if (translate_init("libmlk-adventure") < 0)
+		panic();
+	if (window_open("Molko's Adventure", WINDOW_WIDTH, WINDOW_HEIGHT) < 0)
 		panic();
 
 	/*
@@ -82,25 +81,20 @@
 	 * to be running.
 	 */
 
-	/* Init unrecoverable panic state. */
-	molko.panic = state_panic_new();
-	panic_handler = crash;
-	trace_handler = trace_hud_handler;
-
 	/* Init other stuff. */
 	assets_init();
 
 	/* Start to splash. */
-#if 0
-	// TODO: put back this.
-	game_switch(state_splashscreen_ne(), true);
-#else
-	game_switch(state_mainmenu_new(), true);
+	game_switch(state_mainmenu_new(), 1);
 	molko.team.members[0] = &character_neth;
 	molko.team.members[1] = &character_neth;
 	inventory_add(&molko.inventory, &item_potion, 100);
-	molko_teleport("maps/map-world.map.zst", -1, -1);
-#endif
+	molko_teleport("maps/map-world.map", -1, -1);
+
+	/* Init unrecoverable panic state. */
+	molko.panic = state_panic_new();
+	panic_handler = crash;
+	trace_handler = trace_hud_handler;
 }
 
 void
@@ -114,7 +108,7 @@
 		for (union event ev; event_poll(&ev); )
 			continue;
 
-		game_switch(molko.panic, true);
+		game_switch(molko.panic, 1);
 		game_loop();
 	}
 }
@@ -124,7 +118,7 @@
 {
 	molko.state = MOLKO_STATE_MAP;
 
-	game_switch(state_map_new(map, origin_x, origin_y), false);
+	game_switch(state_map_new(map, origin_x, origin_y), 0);
 	game.inhibit = INHIBIT_NONE;
 }
 
@@ -133,7 +127,7 @@
 {
 	molko.state = MOLKO_STATE_BATTLE;
 
-	game_switch(state_battle_new(bt), false);
+	game_switch(state_battle_new(bt), 0);
 }
 
 const char *

--- a/libmlk-adventure/adventure/spell/fire-minor.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/spell/fire-minor.c	Wed Mar 10 18:49:08 2021 +0100
@@ -41,7 +41,7 @@
 	struct animation animation;
 };
 
-static bool
+static int
 update(struct action *act, unsigned int ticks)
 {
 	struct rendering *rdr = act->data;

--- a/libmlk-adventure/adventure/state/continue.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/state/continue.c	Wed Mar 10 18:49:08 2021 +0100
@@ -44,7 +44,7 @@
 handle(struct state *state, const union event *ev)
 {
 	struct self *self = state->data;
-	bool selected = false;
+	int selected = 0;
 
 	switch (ev->type) {
 	case EVENT_QUIT:
@@ -52,7 +52,7 @@
 		break;
 	case EVENT_KEYDOWN:
 		if (ev->key.key == KEY_ESCAPE)
-			game_switch(state_mainmenu_new(), false);
+			game_switch(state_mainmenu_new(), 0);
 		else
 			selected = dialog_save_handle(&self->dialog, ev);
 		break;

--- a/libmlk-adventure/adventure/state/mainmenu.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/state/mainmenu.c	Wed Mar 10 18:49:08 2021 +0100
@@ -76,7 +76,7 @@
 static void
 resume(void)
 {
-	game_switch(state_continue_new(), false);
+	game_switch(state_continue_new(), 0);
 }
 
 static void
@@ -102,7 +102,7 @@
 static void
 init_title(struct self *self, struct font *font)
 {
-	if (!font_render(font, &self->texts[3].tex, "Molko's Adventure", 0x000000ff))
+	if (font_render(font, &self->texts[3].tex, "Molko's Adventure", 0x000000ff) < 0)
 		panic();
 	
 	/* Align header. */
@@ -115,9 +115,9 @@
 static void
 init_items(struct self *self, struct font *font)
 {
-	if (!font_render(font, &self->texts[0].tex, _("New"), 0x000000ff) ||
-	    !font_render(font, &self->texts[1].tex, _("Continue"), 0x000000ff) ||
-	    !font_render(font, &self->texts[2].tex, _("Quit"), 0x000000ff))
+	if (font_render(font, &self->texts[0].tex, _("New"), 0x000000ff) < 0 ||
+	    font_render(font, &self->texts[1].tex, _("Continue"), 0x000000ff) < 0 ||
+	    font_render(font, &self->texts[2].tex, _("Quit"), 0x000000ff) < 0)
 		panic();
 
 	self->texts[0].x = (window.w / 2) - (self->texts[0].tex.w / 2);
@@ -136,8 +136,8 @@
 	struct self *self = state->data;
 	struct font fonts[2];
 
-	if (!font_open(&fonts[0], molko_path("fonts/teutonic.ttf"), 130) ||
-	    !font_open(&fonts[1], molko_path("fonts/pirata-one.ttf"), 30))
+	if (font_open(&fonts[0], molko_path("fonts/teutonic.ttf"), 130) < 0||
+	    font_open(&fonts[1], molko_path("fonts/pirata-one.ttf"), 30) < 0)
 		panic();
 
 	fonts[0].style = fonts[1].style = FONT_STYLE_ANTIALIASED;

--- a/libmlk-adventure/adventure/state/map.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/state/map.c	Wed Mar 10 18:49:08 2021 +0100
@@ -54,11 +54,11 @@
 
 	self->map_file.load_action = mapscene_load_action;
 
-	if (!map_file_open(&self->map_file, &self->map, molko_path(self->name)))
+	if (map_file_open(&self->map_file, &self->map, molko_path(self->name)) < 0)
 		panic();
 
 	/* TODO: find this from team maybe. */
-	if (!image_open(&molko.map_player_texture, molko_path("sprites/john.png")))
+	if (image_open(&molko.map_player_texture, molko_path("sprites/john.png")) < 0)
 		panic();
 
 	sprite_init(&molko.map_player_sprite, &molko.map_player_texture, 48, 48);
@@ -72,7 +72,7 @@
 
 	mapscene_load(&self->map);
 
-	if (!map_init(&self->map))
+	if (map_init(&self->map) < 0)
 		panic();
 }
 

--- a/libmlk-adventure/adventure/state/panic.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/state/panic.c	Wed Mar 10 18:49:08 2021 +0100
@@ -118,10 +118,10 @@
 	theme = theme_default();
 	font = theme->fonts[THEME_FONT_INTERFACE];
 
-	if (!font_render(font, &self->texts[0].tex, "An unrecoverable error occured and the game cannot continue.", FOREGROUND) ||
-	    !font_render(font, &self->texts[1].tex, "Please report the detailed error as provided below.", FOREGROUND) ||
-	    !font_render(font, &self->texts[2].tex, "Press <s> to save information and generate a core dump.", FOREGROUND) ||
-	    !font_render(font, &self->texts[3].tex, "Press <q> to quit without saving information.", FOREGROUND))
+	if (font_render(font, &self->texts[0].tex, "An unrecoverable error occured and the game cannot continue.", FOREGROUND) < 0||
+	    font_render(font, &self->texts[1].tex, "Please report the detailed error as provided below.", FOREGROUND) < 0||
+	    font_render(font, &self->texts[2].tex, "Press <s> to save information and generate a core dump.", FOREGROUND) < 0||
+	    font_render(font, &self->texts[3].tex, "Press <q> to quit without saving information.", FOREGROUND) < 0)
 		die("%s", error());
 
 	/* All align x the same. */
@@ -171,7 +171,7 @@
 	/* The error is only available here. */
 	font = theme->fonts[THEME_FONT_INTERFACE];
 
-	if (!font_render(font, &tex, error(), FOREGROUND))
+	if (font_render(font, &tex, error(), FOREGROUND) < 0)
 		die("%s\n", error());
 
 	align(ALIGN_LEFT, &x, &y, tex.w, tex.h, 0, 0, window.w, window.h);

--- a/libmlk-adventure/adventure/state/splashscreen.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/state/splashscreen.c	Wed Mar 10 18:49:08 2021 +0100
@@ -54,7 +54,7 @@
 	struct self *self = state->data;
 	struct font font;
 
-	if (!font_open(&font, molko_path("fonts/cubic.ttf"), 80))
+	if (font_open(&font, molko_path("fonts/cubic.ttf"), 80) < 0)
 		panic();
 
 	font.style = FONT_STYLE_ANTIALIASED;
@@ -75,7 +75,7 @@
 	self->elapsed += ticks;
 
 	if (self->elapsed >= DELAY)
-		game_switch(state_mainmenu_new(), false);
+		game_switch(state_mainmenu_new(), 0);
 }
 
 static void

--- a/libmlk-adventure/adventure/trace_hud.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-adventure/adventure/trace_hud.c	Wed Mar 10 18:49:08 2021 +0100
@@ -115,14 +115,14 @@
 	memset(&data, 0, sizeof (data));
 }
 
-static bool
+static int
 update(struct action *a, unsigned int ticks)
 {
 	(void)a;
 
 	trace_hud_update(ticks);
 
-	return false;
+	return 0;
 }
 
 static void

--- a/libmlk-core/core/action.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/action.c	Wed Mar 10 18:49:08 2021 +0100
@@ -35,7 +35,7 @@
 		act->handle(act, ev);
 }
 
-bool
+int
 action_update(struct action *act, unsigned int ticks)
 {
 	assert(act);
@@ -43,7 +43,8 @@
 	if (act->update)
 		return act->update(act, ticks);
 
-	return false;
+	/* No function means immortal action. */
+	return 0;
 }
 
 void
@@ -81,7 +82,7 @@
 	memset(st, 0, sizeof (*st));
 }
 
-bool
+int
 action_stack_add(struct action_stack *st, struct action *act)
 {
 	assert(st);
@@ -90,11 +91,11 @@
 	for (size_t i = 0; i < ACTION_STACK_MAX; ++i) {
 		if (!st->actions[i]) {
 			st->actions[i] = act;
-			return true;
+			return 0;
 		}
 	}
 
-	return false;
+	return -1;
 }
 
 void
@@ -110,7 +111,7 @@
 			action_handle(act, ev);
 }
 
-bool
+int
 action_stack_update(struct action_stack *st, unsigned int ticks)
 {
 	assert(st);
@@ -146,7 +147,7 @@
 			action_draw(act);
 }
 
-bool
+int
 action_stack_completed(const struct action_stack *st)
 {
 	assert(st);
@@ -155,9 +156,9 @@
 
 	ACTION_FOREACH(st, act)
 		if (act)
-			return false;
+			return 0;
 
-	return true;
+	return 1;
 }
 
 void

--- a/libmlk-core/core/action.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/action.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_ACTION_H
 #define MOLKO_CORE_ACTION_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 #define ACTION_STACK_MAX (128)
@@ -29,11 +27,11 @@
 
 struct action {
 	void *data;
-	void (*handle)(struct action *act, const union event *ev);
-	bool (*update)(struct action *act, unsigned int ticks);
-	void (*draw)(struct action *act);
-	void (*end)(struct action *act);
-	void (*finish)(struct action *act);
+	void (*handle)(struct action *, const union event *);
+	int (*update)(struct action *, unsigned int);
+	void (*draw)(struct action *);
+	void (*end)(struct action *);
+	void (*finish)(struct action *);
 };
 
 struct action_stack {
@@ -43,40 +41,40 @@
 CORE_BEGIN_DECLS
 
 void
-action_handle(struct action *act, const union event *ev);
+action_handle(struct action *, const union event *);
 
-bool
-action_update(struct action *act, unsigned int ticks);
+int
+action_update(struct action *, unsigned int);
 
 void
-action_draw(struct action *act);
+action_draw(struct action *);
 
 void
-action_end(struct action *act);
+action_end(struct action *);
 
 void
-action_finish(struct action *act);
+action_finish(struct action *);
 
 void
-action_stack_init(struct action_stack *st);
+action_stack_init(struct action_stack *);
 
-bool
-action_stack_add(struct action_stack *st, struct action *act);
+int
+action_stack_add(struct action_stack *, struct action *);
 
 void
-action_stack_handle(struct action_stack *st, const union event *ev);
+action_stack_handle(struct action_stack *, const union event *);
 
-bool
-action_stack_update(struct action_stack *st, unsigned int ticks);
+int
+action_stack_update(struct action_stack *, unsigned int);
 
 void
-action_stack_draw(const struct action_stack *st);
+action_stack_draw(const struct action_stack *);
 
-bool
-action_stack_completed(const struct action_stack *st);
+int
+action_stack_completed(const struct action_stack *);
 
 void
-action_stack_finish(struct action_stack *st);
+action_stack_finish(struct action_stack *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/alloc.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/alloc.c	Wed Mar 10 18:49:08 2021 +0100
@@ -149,7 +149,7 @@
 	if (size / newlen != elemsize)
 		return errorf("%s", strerror(ENOMEM)), NULL;
 	if (!(ptr = funcs->realloc(ptr, size)))
-		return false;
+		return NULL;
 
 	if (newlen > oldlen)
 		memset((unsigned char *)ptr + (oldlen * elemsize), 0, (newlen - oldlen) * elemsize);
@@ -185,21 +185,21 @@
 	return ret;
 }
 
-bool
+int
 alloc_pool_init(struct alloc_pool *pool, size_t elemsize, void (*finalizer)(void *))
 {
 	assert(pool);
 	assert(elemsize != 0);
 
 	if (!(pool->data = alloc_array(ALLOC_POOL_INIT_DEFAULT, elemsize)))
-		return false;
+		return -1;
 
 	pool->elemsize = elemsize;
 	pool->size = 0;
 	pool->capacity = ALLOC_POOL_INIT_DEFAULT;
 	pool->finalizer = finalizer;
 
-	return true;
+	return 0;
 }
 
 void *

--- a/libmlk-core/core/alloc.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/alloc.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_ALLOC_H
 #define MOLKO_CORE_ALLOC_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -30,9 +29,9 @@
 
 /* Custom allocator. */
 struct alloc_funcs {
-	void *(*alloc)(size_t size);
-	void *(*realloc)(void *ptr, size_t size);
-	void (*free)(void *ptr);
+	void *(*alloc)(size_t);
+	void *(*realloc)(void *, size_t);
+	void (*free)(void *);
 };
 
 /* Minimalist growable array for loading data. */
@@ -41,54 +40,54 @@
 	size_t elemsize;
 	size_t size;
 	size_t capacity;
-	void (*finalizer)(void *data);
+	void (*finalizer)(void *);
 };
 
 CORE_BEGIN_DECLS
 
 /* allocator functions. */
 void
-alloc_set(const struct alloc_funcs *funcs);
+alloc_set(const struct alloc_funcs *);
 
 void *
-alloc_new(size_t size);
+alloc_new(size_t);
 
 void *
-alloc_new0(size_t size);
+alloc_new0(size_t);
 
 void *
-alloc_array(size_t len, size_t elemsize);
+alloc_array(size_t, size_t);
 
 void *
-alloc_array0(size_t len, size_t elemsize);
+alloc_array0(size_t, size_t);
 
 void *
-alloc_renew(void *ptr, size_t size);
+alloc_renew(void *, size_t);
 
 void *
-alloc_rearray(void *ptr, size_t newlen, size_t elemsize);
+alloc_rearray(void *, size_t, size_t);
 
 void *
-alloc_rearray0(void *ptr, size_t oldlen, size_t newlen, size_t elemsize);
+alloc_rearray0(void *, size_t, size_t, size_t);
 
 void *
-alloc_dup(const void *ptr, size_t size);
+alloc_dup(const void *, size_t);
 
 char *
-alloc_sdup(const char *src);
+alloc_sdup(const char *);
 
 /* alloc_pool functions. */
-bool
-alloc_pool_init(struct alloc_pool *pool, size_t elemsize, void (*finalizer)(void *));
+int
+alloc_pool_init(struct alloc_pool *, size_t , void (*)(void *));
 
 void *
-alloc_pool_new(struct alloc_pool *pool);
+alloc_pool_new(struct alloc_pool *);
 
 void *
-alloc_pool_get(const struct alloc_pool *pool, size_t index);
+alloc_pool_get(const struct alloc_pool *, size_t);
 
 void
-alloc_pool_finish(struct alloc_pool *pool);
+alloc_pool_finish(struct alloc_pool *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/animation.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/animation.c	Wed Mar 10 18:49:08 2021 +0100
@@ -23,7 +23,7 @@
 #include "animation.h"
 #include "sprite.h"
 
-static bool
+static int
 update(struct drawable *dw, unsigned int ticks)
 {
 	return animation_update(dw->data, ticks);
@@ -58,7 +58,7 @@
 	an->elapsed = 0;
 }
 
-bool
+int
 animation_completed(const struct animation *an)
 {
 	assert(an);
@@ -68,7 +68,7 @@
 	       an->column >= an->sprite->ncols;
 }
 
-bool
+int
 animation_update(struct animation *an, unsigned int ticks)
 {
 	assert(an);
@@ -76,7 +76,7 @@
 	an->elapsed += ticks;
 
 	if (an->elapsed < an->delay)
-		return false;
+		return 0;
 
 	/* Increment column first */
 	if (++an->column >= an->sprite->ncols) {
@@ -94,7 +94,7 @@
 	return animation_completed(an);
 }
 
-bool
+int
 animation_draw(const struct animation *an, int x, int y)
 {
 	assert(an);

--- a/libmlk-core/core/animation.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/animation.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_ANIMATION_H
 #define MOLKO_CORE_ANIMATION_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 struct drawable;
@@ -37,22 +35,22 @@
 CORE_BEGIN_DECLS
 
 void
-animation_init(struct animation *an, const struct sprite *sprite, unsigned int delay);
+animation_init(struct animation *, const struct sprite *, unsigned int);
 
 void
-animation_start(struct animation *an);
+animation_start(struct animation *);
 
-bool
-animation_completed(const struct animation *an);
+int
+animation_completed(const struct animation *);
 
-bool
-animation_update(struct animation *an, unsigned int ticks);
+int
+animation_update(struct animation *, unsigned int);
 
-bool
-animation_draw(const struct animation *an, int x, int y);
+int
+animation_draw(const struct animation *, int, int);
 
 void
-animation_drawable(struct animation *an, struct drawable *dw, int x, int y);
+animation_drawable(struct animation *, struct drawable *, int, int);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/clock.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/clock.h	Wed Mar 10 18:49:08 2021 +0100
@@ -28,10 +28,10 @@
 CORE_BEGIN_DECLS
 
 void
-clock_start(struct clock *clock);
+clock_start(struct clock *);
 
 unsigned int
-clock_elapsed(const struct clock *clock);
+clock_elapsed(const struct clock *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/core.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/core.c	Wed Mar 10 18:49:08 2021 +0100
@@ -25,7 +25,7 @@
 #include "sys.h"
 #include "translate.h"
 
-bool
+int
 core_init(const char *organization, const char *name)
 {
 	assert(organization);
@@ -33,12 +33,12 @@
 
 	srand(time(NULL));
 
-	if (!sys_init(organization, name))
-		return false;
+	if (sys_init(organization, name) < 0)
+		return -1;
 
 	translate_init("libmlk-core");
 
-	return true;
+	return 0;
 }
 
 void

--- a/libmlk-core/core/core.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/core.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_CORE_H
 #define MOLKO_CORE_CORE_H
 
-#include <stdbool.h>
-
 #if defined(__cplusplus)
 #       define CORE_BEGIN_DECLS extern "C" {
 #       define CORE_END_DECLS   }
@@ -31,8 +29,8 @@
 
 CORE_BEGIN_DECLS
 
-bool
-core_init(const char *organization, const char *name);
+int
+core_init(const char *, const char *);
 
 void
 core_finish(void);

--- a/libmlk-core/core/drawable.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/drawable.c	Wed Mar 10 18:49:08 2021 +0100
@@ -29,7 +29,7 @@
 #define DRAWABLE_FOREACH(st, iter) \
 	for (size_t i = 0; i < DRAWABLE_STACK_MAX && ((iter) = (st)->objects[i], 1); ++i)
 
-bool
+int
 drawable_update(struct drawable *dw, unsigned int ticks)
 {
 	assert(dw);
@@ -71,7 +71,7 @@
 	memset(st, 0, sizeof (*st));
 }
 
-bool
+int
 drawable_stack_add(struct drawable_stack *st, struct drawable *dw)
 {
 	assert(st);
@@ -80,14 +80,14 @@
 	for (size_t i = 0; i < DRAWABLE_STACK_MAX; ++i) {
 		if (!st->objects[i]) {
 			st->objects[i] = dw;
-			return true;
+			return 0;
 		}
 	}
 
-	return false;
+	return -1;
 }
 
-bool
+int
 drawable_stack_update(struct drawable_stack *st, unsigned int ticks)
 {
 	assert(st);
@@ -121,7 +121,7 @@
 			drawable_draw(dw);
 }
 
-bool
+int
 drawable_stack_completed(const struct drawable_stack *st)
 {
 	assert(st);
@@ -130,9 +130,9 @@
 
 	DRAWABLE_FOREACH(st, dw)
 		if (dw)
-			return false;
+			return 0;
 
-	return true;
+	return 1;
 }
 
 void

--- a/libmlk-core/core/drawable.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/drawable.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_DRAWABLE_H
 #define MOLKO_CORE_DRAWABLE_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 #define DRAWABLE_STACK_MAX (128)
@@ -29,10 +27,10 @@
 	void *data;
 	int x;
 	int y;
-	bool (*update)(struct drawable *dw, unsigned int ticks);
-	void (*draw)(struct drawable *dw);
-	void (*end)(struct drawable *act);
-	void (*finish)(struct drawable *dw);
+	int (*update)(struct drawable *, unsigned int);
+	void (*draw)(struct drawable *);
+	void (*end)(struct drawable *);
+	void (*finish)(struct drawable *);
 };
 
 struct drawable_stack {
@@ -41,35 +39,35 @@
 
 CORE_BEGIN_DECLS
 
-bool
-drawable_update(struct drawable *dw, unsigned int ticks);
+int
+drawable_update(struct drawable *, unsigned int);
 
 void
-drawable_draw(struct drawable *dw);
+drawable_draw(struct drawable *);
 
 void
-drawable_end(struct drawable *dw);
+drawable_end(struct drawable *);
 
 void
-drawable_finish(struct drawable *dw);
+drawable_finish(struct drawable *);
 
 void
-drawable_stack_init(struct drawable_stack *st);
+drawable_stack_init(struct drawable_stack *);
 
-bool
-drawable_stack_add(struct drawable_stack *st, struct drawable *dw);
+int
+drawable_stack_add(struct drawable_stack *, struct drawable *);
 
-bool
-drawable_stack_update(struct drawable_stack *st, unsigned int ticks);
+int
+drawable_stack_update(struct drawable_stack *, unsigned int);
 
 void
-drawable_stack_draw(struct drawable_stack *st);
+drawable_stack_draw(struct drawable_stack *);
 
-bool
-drawable_stack_completed(const struct drawable_stack *st);
+int
+drawable_stack_completed(const struct drawable_stack *);
 
 void
-drawable_stack_finish(struct drawable_stack *st);
+drawable_stack_finish(struct drawable_stack *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/error.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/error.c	Wed Mar 10 18:49:08 2021 +0100
@@ -31,7 +31,7 @@
 	return buffer;
 }
 
-bool
+int
 errorf(const char *fmt, ...)
 {
 	assert(fmt);
@@ -42,15 +42,15 @@
 	errorva(fmt, ap);
 	va_end(ap);
 
-	return false;
+	return -1;
 }
 
-bool
+int
 errorva(const char *fmt, va_list ap)
 {
 	assert(fmt);
 
 	vsnprintf(buffer, sizeof (buffer), fmt, ap);
 
-	return false;
+	return -1;
 }

--- a/libmlk-core/core/error.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/error.h	Wed Mar 10 18:49:08 2021 +0100
@@ -20,7 +20,6 @@
 #define MOLKO_CORE_ERROR_H
 
 #include <stdarg.h>
-#include <stdbool.h>
 
 #include "core.h"
 
@@ -29,11 +28,11 @@
 const char *
 error(void);
 
-bool
-errorf(const char *fmt, ...);
+int
+errorf(const char *, ...);
 
-bool
-errorva(const char *fmt, va_list ap);
+int
+errorva(const char *, va_list);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/event.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/event.c	Wed Mar 10 18:49:08 2021 +0100
@@ -222,7 +222,7 @@
 	}
 }
 
-bool
+int
 event_poll(union event *ev)
 {
 	SDL_Event event;
@@ -235,22 +235,22 @@
 		switch (event.type) {
 		case SDL_QUIT:
 			ev->type = EVENT_QUIT;
-			return true;
+			return 1;
 		case SDL_KEYDOWN:
 		case SDL_KEYUP:
 			convert_key(&event, ev);
-			return true;
+			return 1;
 		case SDL_MOUSEMOTION:
 			convert_mouse(&event, ev);
-			return true;
+			return 1;
 		case SDL_MOUSEBUTTONDOWN:
 		case SDL_MOUSEBUTTONUP:
 			convert_click(&event, ev);
-			return true;
+			return 1;
 		default:
 			continue;
 		}
 	}
 
-	return false;
+	return 0;
 }

--- a/libmlk-core/core/event.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/event.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_EVENT_H
 #define MOLKO_CORE_EVENT_H
 
-#include <stdbool.h>
-
 #include "core.h"
 #include "key.h"
 #include "mouse.h"
@@ -63,8 +61,8 @@
 
 CORE_BEGIN_DECLS
 
-bool
-event_poll(union event *ev);
+int
+event_poll(union event *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/font.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/font.c	Wed Mar 10 18:49:08 2021 +0100
@@ -27,7 +27,7 @@
 #include "texture_p.h"
 #include "util.h"
 
-bool
+int
 font_open(struct font *font, const char *path, unsigned int size)
 {
 	assert(font);
@@ -36,10 +36,10 @@
 	if (!(font->handle = TTF_OpenFont(path, size)))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 font_openmem(struct font *font, const void *buffer, size_t buflen, unsigned int size)
 {
 	assert(font);
@@ -48,28 +48,19 @@
 	SDL_RWops *ops;
 
 	if (!(ops = SDL_RWFromConstMem(buffer, buflen)) ||
-	   (!(font->handle = TTF_OpenFontRW(ops, true, size))))
+	   (!(font->handle = TTF_OpenFontRW(ops, 1, size))))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-void
-font_shallow(struct font *dst, const struct font *src)
-{
-	assert(dst);
-	assert(src);
-
-	memcpy(dst, src, sizeof (*src));
-}
-
-bool
+int
 font_ok(const struct font *font)
 {
 	return font && font->handle;
 }
 
-bool
+int
 font_render(struct font *font, struct texture *tex, const char *text, unsigned int color)
 {
 	assert(font_ok(font));
@@ -107,16 +98,21 @@
 	return TTF_FontHeight(font->handle);
 }
 
-bool
+int
 font_query(const struct font *font, const char *text, unsigned int *w, unsigned int *h)
 {
 	assert(font_ok(font));
 	assert(text);
 
+	if (w)
+		*w = 0;
+	if (h)
+		*h = 0;
+
 	if (TTF_SizeUTF8(font->handle, text, (int *)w, (int *)h) != 0)
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
 void

--- a/libmlk-core/core/font.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/font.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_FONT_H
 #define MOLKO_CORE_FONT_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -38,26 +37,26 @@
 
 CORE_BEGIN_DECLS
 
-bool
-font_open(struct font *font, const char *path, unsigned int size);
+int
+font_open(struct font *, const char *, unsigned int);
 
-bool
-font_openmem(struct font *font, const void *buffer, size_t buflen, unsigned int size);
+int
+font_openmem(struct font *, const void *, size_t, unsigned int);
 
-bool
-font_ok(const struct font *font);
+int
+font_ok(const struct font *);
 
-bool
-font_render(struct font *font, struct texture *tex, const char *text, unsigned int color);
+int
+font_render(struct font *, struct texture *, const char *, unsigned int);
 
 unsigned int
-font_height(const struct font *font);
+font_height(const struct font *);
 
-bool
-font_query(const struct font *font, const char *text, unsigned int *w, unsigned int *h);
+int
+font_query(const struct font *, const char *, unsigned int *, unsigned int *);
 
 void
-font_finish(struct font *font);
+font_finish(struct font *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/game.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/game.c	Wed Mar 10 18:49:08 2021 +0100
@@ -31,7 +31,7 @@
 struct game game;
 
 void
-game_switch(struct state *state, bool quick)
+game_switch(struct state *state, int quick)
 {
 	assert(state);
 

--- a/libmlk-core/core/game.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/game.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_GAME_H
 #define MOLKO_CORE_GAME_H
 
-#include <stdbool.h>
-
 #include "core.h"
 #include "inhibit.h"
 
@@ -42,16 +40,16 @@
 CORE_BEGIN_DECLS
 
 void
-game_switch(struct state *state, bool quick);
+game_switch(struct state *, int);
 
 struct state *
-game_replace(struct state *state);
+game_replace(struct state *);
 
 void
-game_handle(const union event *event);
+game_handle(const union event *);
 
 void
-game_update(unsigned int ticks);
+game_update(unsigned int);
 
 void
 game_draw(void);

--- a/libmlk-core/core/image.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/image.c	Wed Mar 10 18:49:08 2021 +0100
@@ -17,7 +17,6 @@
  */
 
 #include <assert.h>
-#include <stdbool.h>
 
 #include <SDL_image.h>
 
@@ -39,7 +38,7 @@
 	}
 }
 
-bool
+int
 image_open(struct texture *tex, const char *path)
 {
 	assert(tex);
@@ -50,20 +49,20 @@
 
 	dimensions(tex);
 
-	return true;
+	return 0;
 }
 
-bool
+int
 image_openmem(struct texture *tex, const void *buffer, size_t size)
 {
 	assert(buffer);
 
 	SDL_RWops *ops = SDL_RWFromConstMem(buffer, size);
 
-	if (!ops || !(tex->handle = IMG_LoadTexture_RW(RENDERER(), ops, true)))
+	if (!ops || !(tex->handle = IMG_LoadTexture_RW(RENDERER(), ops, 1)))
 		return errorf("%s", SDL_GetError());
 
 	dimensions(tex);
 
-	return true;
+	return 0;
 }

--- a/libmlk-core/core/image.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/image.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_IMAGE_H
 #define MOLKO_CORE_IMAGE_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -28,11 +27,11 @@
 
 CORE_BEGIN_DECLS
 
-bool
-image_open(struct texture *tex, const char *path);
+int
+image_open(struct texture *, const char *);
 
-bool
-image_openmem(struct texture *tex, const void *buffer, size_t size);
+int
+image_openmem(struct texture *, const void *, size_t);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/maths.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/maths.c	Wed Mar 10 18:49:08 2021 +0100
@@ -18,7 +18,7 @@
 
 #include "maths.h"
 
-bool
+int
 maths_is_boxed(int x, int y, unsigned int w, unsigned int h, int px, int py)
 {
 	return px > x &&

--- a/libmlk-core/core/maths.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/maths.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,17 +19,15 @@
 #ifndef MOLKO_CORE_MATHS_H
 #define MOLKO_CORE_MATHS_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 CORE_BEGIN_DECLS
 
-bool
-maths_is_boxed(int x, int y, unsigned int w, unsigned int h, int px, int py);
+int
+maths_is_boxed(int, int, unsigned int, unsigned int, int, int);
 
 float
-maths_scale(float v, float omin, float omax, float nmin, float nmax);
+maths_scale(float, float, float, float, float);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/music.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/music.c	Wed Mar 10 18:49:08 2021 +0100
@@ -24,7 +24,7 @@
 #include "error.h"
 #include "music.h"
 
-bool
+int
 music_open(struct music *mus, const char *path)
 {
 	assert(mus);
@@ -33,10 +33,10 @@
 	if (!(mus->handle = Mix_LoadMUS(path)))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 music_openmem(struct music *mus, const void *buffer, size_t buffersz)
 {
 	assert(mus);
@@ -45,19 +45,19 @@
 	SDL_RWops *ops;
 
 	if (!(ops = SDL_RWFromConstMem(buffer, buffersz)) ||
-	    !(mus->handle = Mix_LoadMUS_RW(ops, true)))
+	    !(mus->handle = Mix_LoadMUS_RW(ops, 1)))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 music_ok(const struct music *mus)
 {
 	return mus && mus->handle;
 }
 
-bool
+int
 music_play(struct music *mus, enum music_flags flags, unsigned int fadein)
 {
 	assert(mus);
@@ -73,10 +73,10 @@
 	if (ret < 0)
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 music_playing(void)
 {
 	return Mix_PlayingMusic();

--- a/libmlk-core/core/music.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/music.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_MUSIC_H
 #define MOLKO_CORE_MUSIC_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -35,19 +34,19 @@
 
 CORE_BEGIN_DECLS
 
-bool
-music_open(struct music *mus, const char *path);
+int
+music_open(struct music *, const char *);
 
-bool
-music_openmem(struct music *mus, const void *buffer, size_t buffersz);
+int
+music_openmem(struct music *, const void *, size_t);
 
-bool
-music_ok(const struct music *mus);
+int
+music_ok(const struct music *);
 
-bool
-music_play(struct music *mus, enum music_flags flags, unsigned int fadein);
+int
+music_play(struct music *, enum music_flags, unsigned int);
 
-bool
+int
 music_playing(void);
 
 void
@@ -57,10 +56,10 @@
 music_resume(void);
 
 void
-music_stop(unsigned int fadeout);
+music_stop(unsigned int);
 
 void
-music_finish(struct music *mus);
+music_finish(struct music *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/painter.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/painter.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_PAINTER_H
 #define MOLKO_CORE_PAINTER_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 struct texture;
@@ -31,25 +29,25 @@
 painter_get_target(void);
 
 void
-painter_set_target(struct texture *tex);
+painter_set_target(struct texture *);
 
 unsigned long
 painter_get_color(void);
 
 void
-painter_set_color(unsigned long color);
+painter_set_color(unsigned long);
 
 void
-painter_draw_line(int x1, int y1, int x2, int y2);
+painter_draw_line(int, int, int, int);
 
 void
-painter_draw_point(int x, int y);
+painter_draw_point(int, int);
 
 void
-painter_draw_rectangle(int x, int y, unsigned int w, unsigned int h);
+painter_draw_rectangle(int, int, unsigned int, unsigned int);
 
 void
-painter_draw_circle(int x, int y, int radius);
+painter_draw_circle(int, int, int);
 
 void
 painter_clear(void);

--- a/libmlk-core/core/panic.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/panic.h	Wed Mar 10 18:49:08 2021 +0100
@@ -29,10 +29,10 @@
 CORE_BEGIN_DECLS
 
 noreturn void
-panicf(const char *fmt, ...);
+panicf(const char *, ...);
 
 noreturn void
-panicva(const char *fmt, va_list ap);
+panicva(const char *, va_list);
 
 noreturn void
 panic(void);

--- a/libmlk-core/core/script.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/script.c	Wed Mar 10 18:49:08 2021 +0100
@@ -39,7 +39,7 @@
 	script_handle(a->data, ev);
 }
 
-static bool
+static int
 update(struct action *a, unsigned int ticks)
 {
 	return script_update(a->data, ticks);
@@ -65,7 +65,7 @@
 	memset(s, 0, sizeof (*s));
 }
 
-bool
+int
 script_append(struct script *s, struct action *a)
 {
 	assert(s);
@@ -76,7 +76,7 @@
 
 	s->actions[s->actionsz++] = a;
 
-	return true;
+	return 0;
 }
 
 void
@@ -91,7 +91,7 @@
 		action_handle(a, ev);
 }
 
-bool
+int
 script_update(struct script *s, unsigned int ticks)
 {
 	assert(s);
@@ -99,7 +99,7 @@
 	struct action *a = current(s);
 
 	if (!a)
-		return true;
+		return 1;
 
 	if (action_update(a, ticks)) {
 		action_end(a);
@@ -120,7 +120,7 @@
 		action_draw(a);
 }
 
-bool
+int
 script_completed(const struct script *s)
 {
 	assert(s);

--- a/libmlk-core/core/script.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/script.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_SCRIPT_H
 #define MOLKO_CORE_SCRIPT_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -39,28 +38,28 @@
 CORE_BEGIN_DECLS
 
 void
-script_init(struct script *s);
+script_init(struct script *);
 
-bool
-script_append(struct script *s, struct action *a);
+int
+script_append(struct script *, struct action *);
 
 void
-script_handle(struct script *s, const union event *ev);
+script_handle(struct script *, const union event *);
 
-bool
-script_update(struct script *s, unsigned int ticks);
+int
+script_update(struct script *, unsigned int);
 
 void
-script_draw(struct script *s);
+script_draw(struct script *);
 
-bool
-script_completed(const struct script *s);
+int
+script_completed(const struct script *);
 
 void
-script_finish(struct script *s);
+script_finish(struct script *);
 
 void
-script_action(struct script *s, struct action *dst);
+script_action(struct script*s, struct action *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/sound.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/sound.c	Wed Mar 10 18:49:08 2021 +0100
@@ -24,7 +24,7 @@
 #include "error.h"
 #include "sound.h"
 
-bool
+int
 sound_open(struct sound *snd, const char *path)
 {
 	assert(snd);
@@ -33,10 +33,10 @@
 	if (!(snd->handle = Mix_LoadWAV(path)))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 sound_openmem(struct sound *snd, const void *buffer, size_t buffersz)
 {
 	assert(snd);
@@ -45,19 +45,19 @@
 	SDL_RWops *ops;
 
 	if (!(ops = SDL_RWFromConstMem(buffer, buffersz)) ||
-	    !(snd->handle = Mix_LoadWAV_RW(ops, true)))
+	    !(snd->handle = Mix_LoadWAV_RW(ops, 1)))
 		return errorf("%s", SDL_GetError());
 
-	return true;
+	return 0;
 }
 
-bool
+int
 sound_ok(const struct sound *snd)
 {
 	return snd && snd->handle;
 }
 
-bool
+int
 sound_play(struct sound *snd, int channel, unsigned int fadein)
 {
 	assert(sound_ok(snd));
@@ -74,7 +74,7 @@
 
 	snd->channel = channel;
 
-	return true;
+	return 0;
 }
 
 void

--- a/libmlk-core/core/sound.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/sound.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,7 +19,6 @@
 #ifndef MOLKO_CORE_SOUND_H
 #define MOLKO_CORE_SOUND_H
 
-#include <stdbool.h>
 #include <stddef.h>
 
 #include "core.h"
@@ -33,29 +32,29 @@
 
 CORE_BEGIN_DECLS
 
-bool
-sound_open(struct sound *snd, const char *path);
+int
+sound_open(struct sound *, const char *);
 
-bool
-sound_openmem(struct sound *snd, const void *buffer, size_t buffersz);
+int
+sound_openmem(struct sound *, const void *, size_t);
 
-bool
-sound_ok(const struct sound *snd);
+int
+sound_ok(const struct sound *);
 
-bool
-sound_play(struct sound *snd, int channel, unsigned int fadein);
+int
+sound_play(struct sound *, int, unsigned int);
 
 void
-sound_pause(struct sound *snd);
+sound_pause(struct sound *);
 
 void
-sound_resume(struct sound *snd);
+sound_resume(struct sound *);
 
 void
-sound_stop(struct sound *snd, unsigned int fadeout);
+sound_stop(struct sound *, unsigned int);
 
 void
-sound_finish(struct sound *snd);
+sound_finish(struct sound *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/sprite.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/sprite.c	Wed Mar 10 18:49:08 2021 +0100
@@ -37,22 +37,19 @@
 	sprite->ncols = tex->w / cellw;
 }
 
-bool
+int
 sprite_ok(const struct sprite *sprite)
 {
-	if (!sprite)
-		return false;
-
-	return texture_ok(sprite->texture) && sprite->cellw != 0 && sprite->cellh != 0;
+	return sprite && texture_ok(sprite->texture) && sprite->cellw != 0 && sprite->cellh != 0;
 }
 
-bool
+int
 sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y)
 {
 	return sprite_scale(sprite, r, c, x, y, sprite->cellw, sprite->cellh);
 }
 
-bool
+int
 sprite_scale(const struct sprite *sprite,
 	     unsigned int r,
 	     unsigned int c,

--- a/libmlk-core/core/sprite.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/sprite.h	Wed Mar 10 18:49:08 2021 +0100
@@ -19,8 +19,6 @@
 #ifndef MOLKO_CORE_SPRITE_H
 #define MOLKO_CORE_SPRITE_H
 
-#include <stdbool.h>
-
 #include "core.h"
 
 struct texture;
@@ -36,25 +34,22 @@
 CORE_BEGIN_DECLS
 
 void
-sprite_init(struct sprite *sprite,
-            struct texture *tex,
-            unsigned int cellw,
-            unsigned int cellh);
+sprite_init(struct sprite *, struct texture *, unsigned int, unsigned int);
 
-bool
-sprite_ok(const struct sprite *sprite);
+int
+sprite_ok(const struct sprite *);
+
+int
+sprite_draw(const struct sprite *, unsigned int, unsigned int, int, int);
 
-bool
-sprite_draw(const struct sprite *sprite, unsigned int r, unsigned int c, int x, int y);
-
-bool
-sprite_scale(const struct sprite *sprite,
-             unsigned int r,
-             unsigned int c,
-             int x,
-             int y,
-             unsigned int w,
-             unsigned int h);
+int
+sprite_scale(const struct sprite *,
+             unsigned int,
+             unsigned int,
+             int,
+             int,
+             unsigned int,
+             unsigned int);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/state.h	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/state.h	Wed Mar 10 18:49:08 2021 +0100
@@ -25,33 +25,33 @@
 
 struct state {
 	void *data;
-	void (*start)(struct state *state);
-	void (*handle)(struct state *state, const union event *ev);
-	void (*update)(struct state *state, unsigned int ticks);
-	void (*draw)(struct state *state);
-	void (*end)(struct state *state);
-	void (*finish)(struct state *state);
+	void (*start)(struct state *);
+	void (*handle)(struct state *, const union event *);
+	void (*update)(struct state *, unsigned int);
+	void (*draw)(struct state *);
+	void (*end)(struct state *);
+	void (*finish)(struct state *);
 };
 
 CORE_BEGIN_DECLS
 
 void
-state_start(struct state *state);
+state_start(struct state *);
 
 void
-state_handle(struct state *state, const union event *ev);
+state_handle(struct state *, const union event *);
 
 void
-state_update(struct state *state, unsigned int ticks);
+state_update(struct state *, unsigned int);
 
 void
-state_draw(struct state *state);
+state_draw(struct state *);
 
 void
-state_end(struct state *state);
+state_end(struct state *);
 
 void
-state_finish(struct state *state);
+state_finish(struct state *);
 
 CORE_END_DECLS
 

--- a/libmlk-core/core/sys.c	Wed Mar 10 18:49:00 2021 +0100
+++ b/libmlk-core/core/sys.c	Wed Mar 10 18:49:08 2021 +0100
@@ -63,7 +63,7 @@
 
 #if defined(_WIN32)
 
-static bool
+static inline int
 is_absolute(const char *path)
 {
 	return !PathIsRelativeA(path);
@@ -71,7 +71,7 @@
 
 #else
 
-static bool
+static inline int
 is_absolute(const char *path)
 {
 	return path[0] == '/';
@@ -79,7 +79,7 @@
 
 #endif
 
-static char *
+static inline char *
 normalize(char *str)
 {
 	for (char *p = str; *p; ++p)
@@ -89,35 +89,7 @@
 	return str;
 }
 
-bool
-sys_init(const char *organization, const char *name)
-{
-#if defined(__MINGW64__)
-	/* On MinGW buffering leads to painful debugging. */
-	setbuf(stderr, NULL);
-	setbuf(stdout, NULL);
-#endif
-
-	strlcpy(info.organization, organization, sizeof (info.organization));
-	strlcpy(info.name, name, sizeof (info.name));
-
-	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
-		return errorf("%s", SDL_GetError());
-	if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
-		return errorf("%s", SDL_GetError());
-	if (TTF_Init() < 0)
-		return errorf("%s", SDL_GetError());
-	if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
-		return errorf("%s", SDL_GetError());
-	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
-		return errorf("%s", SDL_GetError());
-
-	Mix_AllocateChannels(SOUND_CHANNELS_MAX);
-
-	return true;
-}
-
-static const char *
+static inline const char *
 absolute(const char *which)
 {
 	static char path[PATH_MAX];
@@ -193,7 +165,7 @@
 	return path;
 }
 
-static bool
+static inline int
 mkpath(const char *path)
 {
 #ifdef _WIN32
@@ -205,7 +177,35 @@
 		return errorf("%s", strerror(errno));
 #endif
 
-	return true;
+	return 0;
+}
+
+int
+sys_init(const char *organization, const char *name)
+{
+#if defined(__MINGW64__)
+	/* On MinGW buffering leads to painful debugging. */
+	setbuf(stderr, NULL);
+	setbuf(stdout, NULL);
+#endif
+
+	strlcpy(info.organization, organization, sizeof (info.organization));
+	strlcpy(info.name, name, sizeof (info.name));
+
+	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0)
+		return errorf("%s", SDL_GetError());
+	if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
+		return errorf("%s", SDL_GetError());
+	if (TTF_Init() < 0)
+		return errorf("%s", SDL_GetError());
+	if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG)
+		return errorf("%s", SDL_GetError());
+	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0)
+		return errorf("%s", SDL_GetError());
+
+	Mix_AllocateChannels(SOUND_CHANNELS_MAX);
+
+	return 0;
 }
 
 const char *
@@ -221,7 +221,7 @@
 	}
 }
 
-bool
+int
 sys_mkdir(const char *directory)
 {
 	char path[PATH_MAX], *p;
@@ -244,8 +244,8 @@
 		if (*p == '/') {
 			*p = 0;
 
-			if (!mkpath(path))
-				return false;
+			if (mkpath(path) < 0)
+				return -1;
 
 			*p = '/';
 		}