Move math.h to firmware/libc/include/ and fix slight incompatibilities between our and the host's math.h

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26020 a1c6a512-1295-4272-9138-f99709370657

firmware/libc/include/math.h

@@ -0,0 +1,53 @@
+/* math.h -- Definitions for the math floating point package.  */
+
+#ifndef  _MATH_H_
+#ifdef __cplusplus
+extern "C" {
+#endif
+#define  _MATH_H_
+
+#include "_ansi.h"
+
+#ifndef __STRICT_ANSI__
+
+#define __signgam_r(ptr) ((ptr)->_new._reent._gamma_signgam)
+
+/* Values for the type field of struct exception.  */
+
+#define DOMAIN 1
+#define SING 2
+#define OVERFLOW 3
+#define UNDERFLOW 4
+#define TLOSS 5
+#define PLOSS 6
+
+/* Useful constants.  */
+
+#define M_E             2.7182818284590452354
+#define M_LOG2E         1.4426950408889634074
+#define M_LOG10E        0.43429448190325182765
+#define M_LN2           0.69314718055994530942
+#define M_LN10          2.30258509299404568402
+#define M_PI            3.14159265358979323846
+#define M_PI_2          1.57079632679489661923
+#define M_PI_4          0.78539816339744830962
+#define M_3PI_4         2.3561944901923448370E0
+#define M_SQRTPI        1.77245385090551602792981
+#define M_1_PI          0.31830988618379067154
+#define M_2_PI          0.63661977236758134308
+#define M_2_SQRTPI      1.12837916709551257390
+#define M_SQRT2         1.41421356237309504880
+#define M_SQRT1_2       0.70710678118654752440
+#define M_LN2LO         1.9082149292705877000E-10
+#define M_LN2HI         6.9314718036912381649E-1
+#define M_SQRT3         1.73205080756887719000
+#define M_IVLN10        0.43429448190325182765 /* 1 / log(10) */
+#define M_LOG2_E        0.693147180559945309417
+#define M_INVLN2        1.4426950408889633870E0  /* 1 / log(2) */
+
+#endif /* ! defined (__STRICT_ANSI__) */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _MATH_H_ */