Add detour library for hooking

https://github.com/8dcc/detour-lib

src/include/detour.h

@@ -0,0 +1,48 @@
+/**
+ * @file      detour.h
+ * @brief     Detour hooking library header
+ * @author    8dcc
+ *
+ * https://github.com/8dcc/detour-lib
+ */
+
+#ifndef DETOUR_H_
+#define DETOUR_H_
+
+#ifdef __i386__
+typedef uint32_t detour_ptr_t;
+#define JMP_SZ_ 7 /* Size of jmp instructions in 32bit */
+#else
+typedef uint64_t detour_ptr_t;
+#define JMP_SZ_ 12 /* Size of jmp instructions in 64bit */
+#endif
+
+typedef struct {
+    bool detoured;
+    void* orig;
+    void* hook;
+    uint8_t jmp_bytes[JMP_SZ_];
+    uint8_t saved_bytes[JMP_SZ_];
+} detour_data_t;
+
+/*----------------------------------------------------------------------------*/
+
+void detour_init(detour_data_t* data, void* orig, void* hook);
+bool detour_add(detour_data_t* d);
+bool detour_del(detour_data_t* d);
+
+/*----------------------------------------------------------------------------*/
+
+/* Declare the type for the original function */
+#define DECL_DETOUR_TYPE(funcRet, funcName, ...) \
+    typedef funcRet (*funcName##_t)(__VA_ARGS__);
+
+/* Reset original bytes, call original, detour again. detourData is NOT a ptr */
+#define CALL_ORIGINAL(detourData, funcName, ...)      \
+    {                                                 \
+        detour_del(&detourData);                      \
+        ((funcName##_t)detourData.orig)(__VA_ARGS__); \
+        detour_add(&detourData);                      \
+    }
+
+#endif /* DETOUR_H_ */