检测显示器信息

src/include/utils.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stddef.h>
+
+#define LENGTH(X) (sizeof(X) / sizeof(X)[0])
+
+void die(const char *format, ...);
+void *ecalloc(size_t number_of_member, size_t member_size);

src/include/xcb.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+typedef struct monitor_rect_t monitor_rect_t;
+struct monitor_rect_t {
+  int32_t x;
+  int32_t y;
+  uint32_t width;
+  uint32_t height;
+  monitor_rect_t *next;
+};
+
+bool has_other_wm_running(void);
+monitor_rect_t *detect_monitor_rect(void);