make math.h more c++-friendly

[musl] / include / math.h

diff --git a/include/math.h b/include/math.h
index f320b8e..8791bba 100644 (file)
--- a/include/math.h
+++ b/include/math.h
@@ -41,8 +41,11 @@ int __fpclassify(double);
 int __fpclassifyf(float);
 int __fpclassifyl(long double);
 
-#define __FLOAT_BITS(f) (((union { float __f; __uint32_t __i; }){ (f) }).__i)
-#define __DOUBLE_BITS(f) (((union { double __f; __uint64_t __i; }){ (f) }).__i)
+union __float_repr { float __f; __uint32_t __i; };
+union __double_repr { double __f; __uint64_t __i; };
+
+#define __FLOAT_BITS(f) (((union __float_repr){ (float)(f) }).__i)
+#define __DOUBLE_BITS(f) (((union __double_repr){ (double)(f) }).__i)
 
 #define fpclassify(x) ( \
        sizeof(x) == sizeof(float) ? __fpclassifyf(x) : \
@@ -345,6 +348,24 @@ long double truncl(long double);
 
 extern int signgam;
 
+double      j0(double);
+double      j1(double);
+double      jn(int, double);
+
+double      y0(double);
+double      y1(double);
+double      yn(int, double);
+#endif
+
+#ifdef _GNU_SOURCE
+double      scalb(double, double);
+float       scalbf(float, float);
+long double scalbl(long double, long double);
+
+void        sincos(double, double*, double*);
+void        sincosf(float, float*, float*);
+void        sincosl(long double, long double*, long double*);
+
 double      gamma(double);
 float       gammaf(float);
 long double gammal(long double);
@@ -353,37 +374,21 @@ double      lgamma_r(double, int*);
 float       lgammaf_r(float, int*);
 long double lgammal_r(long double, int*);
 
-double      j0(double);
 float       j0f(float);
 long double j0l(long double);
-
-double      j1(double);
 float       j1f(float);
 long double j1l(long double);
-
-double      jn(int, double);
 float       jnf(int, float);
 long double jnl(int, long double);
 
-double      y0(double);
 float       y0f(float);
 long double y0l(long double);
-
-double      y1(double);
 float       y1f(float);
 long double y1l(long double);
-
-double      yn(int, double);
 float       ynf(int, float);
 long double ynl(int, long double);
 #endif
 
-#ifdef _GNU_SOURCE
-double      scalb(double, double);
-float       scalbf(float, float);
-long double scalbl(long double, long double);
-#endif
-
 #ifdef __cplusplus
 }
 #endif