lv_misc files added from misc repo

lv_misc/lv_math.h

@@ -0,0 +1,46 @@
+/**
+ * @file math_base.h
+ * 
+ */
+
+#ifndef MATH_BASE_H
+#define MATH_BASE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "misc_conf.h"
+#if USE_MATH_BASE != 0
+
+/*********************
+ *      DEFINES
+ *********************/
+
+#define MATH_MIN(a,b) (a<b?a:b)
+#define MATH_MAX(a,b) (a>b?a:b)
+#define MATH_ABS(x) ((x)>0?(x):(-(x)))
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif /*USE_MATH_BASE*/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif