X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=include%2Fmath.h;h=9c5f06e7b6e7830c0c21dc5d5a9e2a6d7e0c72b7;hp=fffdf4f7dcb8adf9e26ff34eea9a2b80053810c0;hb=5e9314ff03076a94316d4e66efd082548c065f3d;hpb=74eea628cf43355ba2b227f0bb3c31697d637761

diff --git a/include/math.h b/include/math.h
index fffdf4f7..9c5f06e7 100644
--- a/include/math.h
+++ b/include/math.h
@@ -1,6 +1,10 @@
 #ifndef _MATH_H
 #define _MATH_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __NEED___uint16_t
 #define __NEED___uint32_t
 #define __NEED___uint64_t
@@ -44,6 +48,24 @@ int __fpclassifyl(long double);
 #define isnormal(x) (fpclassify(x) == FP_NORMAL)
 #define isfinite(x) (fpclassify(x) > FP_INFINITE)
 
+#define isunordered(x,y) (isnan((x)) ? ((y),1) : isnan((y)))
+
+static inline int __isrel(long double __x, long double __y, int __rel)
+{
+	if (isunordered(__x, __y)) return 0;
+	if (__rel==-2) return __x < __y;
+	if (__rel==2) return __x > __y;
+	if (__rel==-1) return __x <= __y;
+	if (__rel==1) return __x >= __y;
+	return __x != __y;
+}
+
+#define isless(x,y) __isrel((x), (y), -2)
+#define islessequal(x,y) __isrel((x), (y), -1)
+#define islessgreater(x,y) __isrel((x), (y), 0)
+#define isgreaterequal(x,y) __isrel((x), (y), 1)
+#define isgreater(x,y) __isrel((x), (y), 2)
+
 double      acos(double);
 float       acosf(float);
 long double acosl(long double);
@@ -299,4 +321,8 @@ extern int signgam;
 double      scalb(double, double);
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif