re-organise files, remove cglm prefix from file to make them more clean

include/cglm/util.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+/*
+ Functions:
+   CGLM_INLINE int   glm_sign(int val);
+   CGLM_INLINE float glm_rad(float deg);
+   CGLM_INLINE float glm_deg(float rad);
+   CGLM_INLINE void  glm_make_rad(float *deg);
+   CGLM_INLINE void  glm_make_deg(float *rad);
+   CGLM_INLINE float glm_pow2(float x);
+ */
+
+#ifndef cglm_util_h
+#define cglm_util_h
+
+#include "common.h"
+
+/*!
+ * @brief get sign of 32 bit integer as +1 or -1
+ *
+ * @param val integer value
+ */
+CGLM_INLINE
+int
+glm_sign(int val) {
+  return ((val >> 31) - (-val >> 31));
+}
+
+CGLM_INLINE
+float
+glm_rad(float deg) {
+  return deg * CGLM_PI / 180.0f;
+}
+
+CGLM_INLINE
+float
+glm_deg(float rad) {
+  return rad * 180.0f / CGLM_PI;
+}
+
+CGLM_INLINE
+void
+glm_make_rad(float *deg) {
+  *deg = *deg * CGLM_PI / 180.0f;
+}
+
+CGLM_INLINE
+void
+glm_make_deg(float *rad) {
+  *rad = *rad * 180.0f / CGLM_PI;
+}
+
+CGLM_INLINE
+float
+glm_pow2(float x) {
+  return x * x;
+}
+
+#endif /* cglm_util_h */