Add support for keyboard and mouse

5 files changed, 148 insertions, 0 deletions

diff --git a/src/mouse/CMakeLists.txt b/src/mouse/CMakeLists.txt
new file mode 100644
index 0000000..b4814f9
--- /dev/null
+++ b/src/mouse/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(src "src/mouse.c")
+set(inc "inc")
+
+if(PS1_BUILD)
+    set(src ${src} "ps1/src/mouse.c")
+elseif(SDL1_2_BUILD)
+    set(src ${src} "sdl-1.2/src/mouse.c")
+    set(deps ${deps} SDL)
+endif()
+
+add_library(mouse ${src})
+target_include_directories(mouse PUBLIC ${inc})
+target_link_libraries(mouse PUBLIC ${deps} PRIVATE ${privdeps})
diff --git a/src/mouse/inc/mouse.h b/src/mouse/inc/mouse.h
new file mode 100644
index 0000000..a4b4044
--- /dev/null
+++ b/src/mouse/inc/mouse.h
@@ -0,0 +1,32 @@
+#ifndef MOUSE_H
+#define MOUSE_H
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+enum mouse_button
+{
+    MOUSE_BUTTON_LEFT,
+    MOUSE_BUTTON_RIGHT
+};
+
+struct mouse
+{
+    short x, y;
+    int mask, oldmask;
+};
+
+void mouse_init(struct mouse *m);
+void mouse_update(struct mouse *m);
+bool mouse_justpressed(const struct mouse *m, enum mouse_button b);
+bool mouse_justreleased(const struct mouse *m, enum mouse_button b);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MOUSE_H */
diff --git a/src/mouse/ps1/src/mouse.c b/src/mouse/ps1/src/mouse.c
new file mode 100644
index 0000000..78ea425
--- /dev/null
+++ b/src/mouse/ps1/src/mouse.c
@@ -0,0 +1,9 @@
+#include <mouse.h>
+
+void mouse_update(struct mouse *const m)
+{
+}
+
+void mouse_init(struct mouse *const m)
+{
+}
diff --git a/src/mouse/sdl-1.2/src/mouse.c b/src/mouse/sdl-1.2/src/mouse.c
new file mode 100644
index 0000000..381ac0e
--- /dev/null
+++ b/src/mouse/sdl-1.2/src/mouse.c
@@ -0,0 +1,80 @@
+#include <mouse.h>
+#include <SDL/SDL.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+
+static void mouse_click(const SDL_MouseButtonEvent *const ev,
+    struct mouse *const m)
+{
+    int mask;
+
+    switch (ev->button)
+    {
+        case 1:
+            mask = 1 << MOUSE_BUTTON_LEFT;
+            break;
+
+        case 3:
+            mask = 1 << MOUSE_BUTTON_RIGHT;
+            break;
+
+        default:
+            return;
+    }
+
+    if (ev->state == SDL_PRESSED)
+        m->mask |= mask;
+    else
+        m->mask &= ~mask;
+}
+
+static void mouse_event(const SDL_MouseMotionEvent *const ev,
+    struct mouse *const m)
+{
+    m->x = ev->x;
+    m->y = ev->y;
+}
+
+void mouse_update(struct mouse *const m)
+{
+    SDL_Event ev;
+    int n;
+
+    m->oldmask = m->mask;
+
+    while ((n = SDL_PeepEvents(&ev, 1, SDL_GETEVENT, SDL_MOUSEMOTIONMASK
+        | SDL_MOUSEBUTTONDOWNMASK | SDL_MOUSEBUTTONUPMASK)) > 0)
+    {
+        switch (ev.type)
+        {
+            case SDL_MOUSEBUTTONDOWN:
+                /* Fall through. */
+            case SDL_MOUSEBUTTONUP:
+                mouse_click(&ev.button, m);
+                break;
+
+            case SDL_MOUSEMOTION:
+                mouse_event(&ev.motion, m);
+                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;
+    }
+}
+
+void mouse_init(struct mouse *const m)
+{
+    memset(m, 0, sizeof *m);
+}
diff --git a/src/mouse/src/mouse.c b/src/mouse/src/mouse.c
new file mode 100644
index 0000000..5f5c059
--- /dev/null
+++ b/src/mouse/src/mouse.c
@@ -0,0 +1,14 @@
+#include <mouse.h>
+#include <stdbool.h>
+
+bool mouse_justpressed(const struct mouse *const m,
+    const enum mouse_button b)
+{
+    return m->mask & (1 << b) && !(m->oldmask & (1 << b));
+}
+
+bool mouse_justreleased(const struct mouse *const m,
+    const enum mouse_button b)
+{
+    return !(m->mask & (1 << b)) && m->oldmask & (1 << b);
+}