Merge pull request #937 from kbevers/c99-math-module

Collect custom C99 math functions in proj_math.h

1 files changed, 55 insertions, 0 deletions

diff --git a/src/proj_math.h b/src/proj_math.h
new file mode 100644
index 00000000..0108a439
--- /dev/null
+++ b/src/proj_math.h
@@ -0,0 +1,55 @@
+/******************************************************************************
+ * Project:  PROJ
+ * Purpose:  Make C99 math functions available on C89 systems
+ * Author:   Kristian Evers
+ *
+ ******************************************************************************
+ * Copyright (c) 2018, Kristian Evers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+#include <math.h>
+
+#ifndef PROJ_MATH_H
+#define PROJ_MATH_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !(defined(HAVE_C99_MATH) && HAVE_C99_MATH)
+
+
+double  pj_hypot(double x, double y);
+double  pj_log1p(double x);
+double  pj_asinh(double x);
+int     pj_isnan(double x);
+
+#define hypot   pj_hypot
+#define log1p   pj_log1p
+#define asinh   pj_asinh
+#define isnan   pj_isnan
+
+
+#endif /* !(defined(HAVE_C99_MATH) && HAVE_C99_MATH) */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*PROJ_MATH_H */