Code cleanup: rename BLI_math_easing to BLI_easing

Many hard coded values and really specific to time & keyframes.

source/blender/blenkernel/intern/fcurve.c

@@ -45,7 +45,7 @@
 
 #include "BLI_blenlib.h"
 #include "BLI_math.h"
-#include "BLI_math_easing.h"
+#include "BLI_easing.h"
 #include "BLI_utildefines.h"
 
 #include "BLF_translation.h"

source/blender/blenlib/BLI_easing.h

@@ -28,10 +28,10 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef __BLI_MATH_EASING_H__
-#define __BLI_MATH_EASING_H__
+#ifndef __BLI_EASING_H__
+#define __BLI_EASING_H__
 
-/** \file BLI_math_easing.h
+/** \file BLI_easing.h
  *  \ingroup bli
  */
 
@@ -75,4 +75,4 @@ float SineEaseInOut(float time, float begin, float change, float duration);
 }
 #endif
 
-#endif // __BLI_MATH_EASING_H__
+#endif  /* __BLI_EASING_H__ */

source/blender/blenlib/CMakeLists.txt

@@ -57,6 +57,7 @@ set(SRC
 	intern/convexhull2d.c
 	intern/cpu.c
 	intern/dynlib.c
+	intern/easing.c
 	intern/edgehash.c
 	intern/endian_switch.c
 	intern/fileops.c
@@ -72,7 +73,6 @@ set(SRC
 	intern/math_color.c
 	intern/math_color_blend_inline.c
 	intern/math_color_inline.c
-	intern/math_easing.c
 	intern/math_geom.c
 	intern/math_geom_inline.c
 	intern/math_interp.c
@@ -121,6 +121,7 @@ set(SRC
 	BLI_dlrbTree.h
 	BLI_dynlib.h
 	BLI_dynstr.h
+	BLI_easing.h
 	BLI_edgehash.h
 	BLI_endian_switch.h
 	BLI_endian_switch_inline.h
@@ -142,7 +143,6 @@ set(SRC
 	BLI_math_base.h
 	BLI_math_color.h
 	BLI_math_color_blend.h
-	BLI_math_easing.h
 	BLI_math_geom.h
 	BLI_math_inline.h
 	BLI_math_interp.h

source/blender/blenlib/intern/easing.c

@@ -28,15 +28,17 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/** \file blender/blenlib/intern/math_easing.c
+/** \file blender/blenlib/intern/easing.c
  *  \ingroup bli
  */
  
 #include <math.h>
-#include <stdlib.h>
 
-#include "BLI_math.h"
-#include "BLI_math_easing.h"
+#include "BLI_math_base.h"
+
+#include "BLI_easing.h"  /* own include */
+
+#include "BLI_strict_flags.h"
 
 
 float BackEaseIn(float time, float begin, float change, float duration, float overshoot)