BLI: move safe math functions to separate header

source/blender/blenlib/BLI_math_base_safe.h

@@ -0,0 +1,50 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __BLI_MATH_BASE_SAFE_H__
+#define __BLI_MATH_BASE_SAFE_H__
+
+/** \file
+ * \ingroup bli
+ *
+ * This file provides safe alternatives to common math functions like sqrt, powf.
+ * In this context "safe" means that the output is not NaN if the input is not NaN.
+ */
+
+#include "BLI_math_base.h"
+
+#if BLI_MATH_DO_INLINE
+#  include "intern/math_base_safe_inline.c"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+MINLINE float safe_divide(float a, float b);
+MINLINE float safe_modf(float a, float b);
+MINLINE float safe_logf(float a, float base);
+MINLINE float safe_sqrtf(float a);
+MINLINE float safe_inverse_sqrtf(float a);
+MINLINE float safe_asinf(float a);
+MINLINE float safe_acosf(float a);
+MINLINE float safe_powf(float base, float exponent);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BLI_MATH_BASE_SAFE_H__ */