Add support for keyboard and mouse

1 files changed, 109 insertions, 0 deletions

diff --git a/src/keyboard/sdl-1.2/src/keyboard.c b/src/keyboard/sdl-1.2/src/keyboard.c
new file mode 100644
index 0000000..fafa754
--- /dev/null
+++ b/src/keyboard/sdl-1.2/src/keyboard.c
@@ -0,0 +1,109 @@
+#include <keyboard.h>
+#include <keyboard_key.h>
+#include <SDL/SDL.h>
+#include <stdio.h>
+
+static void append_key(const enum keyboard_key key, struct keyboard *const k)
+{
+    struct keyboard_combo *const c = &k->combo;
+
+    for (size_t i = 0; i < sizeof c->keys / sizeof *c->keys; i++)
+    {
+        enum keyboard_key *const sel = &c->keys[i];
+
+        if (*sel == KEYBOARD_KEY_NONE)
+        {
+            *sel = key;
+            break;
+        }
+    }
+}
+
+static void remove_key(const enum keyboard_key key, struct keyboard *const k)
+{
+    struct keyboard_combo *const c = &k->combo;
+
+    for (size_t i = 0; i < sizeof c->keys / sizeof *c->keys; i++)
+    {
+        enum keyboard_key *const sel = &c->keys[i];
+
+        if (*sel == key)
+            *sel = KEYBOARD_KEY_NONE;
+    }
+}
+
+static void key_event(const SDL_KeyboardEvent *const ev,
+    struct keyboard *const k)
+{
+    static const struct keymap
+    {
+        enum keyboard_key key;
+        SDLKey sdl_key;
+    } keymap[] =
+    {
+        {.key = KEYBOARD_KEY_LEFT, .sdl_key = SDLK_LEFT},
+        {.key = KEYBOARD_KEY_RIGHT, .sdl_key = SDLK_RIGHT},
+        {.key = KEYBOARD_KEY_UP, .sdl_key = SDLK_UP},
+        {.key = KEYBOARD_KEY_DOWN, .sdl_key = SDLK_DOWN},
+        {.key = KEYBOARD_KEY_LCTRL, .sdl_key = SDLK_LCTRL},
+        {.key = KEYBOARD_KEY_RCTRL, .sdl_key = SDLK_RCTRL},
+        {.key = KEYBOARD_KEY_LSHIFT, .sdl_key = SDLK_LSHIFT},
+        {.key = KEYBOARD_KEY_RSHIFT, .sdl_key = SDLK_RSHIFT},
+        {.key = KEYBOARD_KEY_EXIT, .sdl_key = SDLK_ESCAPE},
+        {.key = KEYBOARD_KEY_F11, .sdl_key = SDLK_F11},
+        {.key = KEYBOARD_KEY_W, .sdl_key = SDLK_w},
+        {.key = KEYBOARD_KEY_A, .sdl_key = SDLK_a},
+        {.key = KEYBOARD_KEY_S, .sdl_key = SDLK_s},
+        {.key = KEYBOARD_KEY_D, .sdl_key = SDLK_d}
+    };
+
+    for (size_t i = 0; i < sizeof keymap / sizeof *keymap; i++)
+    {
+        const struct keymap *const km = &keymap[i];
+
+        if (ev->keysym.sym == km->sdl_key)
+        {
+            if (ev->state == SDL_PRESSED)
+                append_key(km->key, k);
+            else
+                remove_key(km->key, k);
+        }
+    }
+}
+
+void keyboard_update(struct keyboard *const k)
+{
+    SDL_Event ev;
+    int n;
+
+    k->oldcombo = k->combo;
+
+    while ((n = SDL_PeepEvents(&ev, 1, SDL_GETEVENT,
+                SDL_KEYEVENTMASK | SDL_QUITMASK)) > 0)
+    {
+        switch (ev.type)
+        {
+            case SDL_KEYDOWN:
+                /* Fall through. */
+            case SDL_KEYUP:
+                key_event(&ev.key, k);
+                break;
+
+            case SDL_QUIT:
+                append_key(KEYBOARD_KEY_EXIT, k);
+                break;
+
+            default:
+                fprintf(stderr, "%s: unexpected SDL_Event %d\n",
+                    __func__, ev.type);
+                break;
+        }
+    }
+
+    if (n < 0)
+    {
+        fprintf(stderr, "%s: SDL_PeepEvents: %s\n",
+            __func__, SDL_GetError());
+        return;
+    }
+}