X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=include%2Fmath.h;h=4c46a055fbdd218d4747a025502b515643fce01b;hp=fffdf4f7dcb8adf9e26ff34eea9a2b80053810c0;hb=9fcecd7b34c66e9d0a2b000809e022a4f3e5e951;hpb=74eea628cf43355ba2b227f0bb3c31697d637761

diff --git a/include/math.h b/include/math.h
index fffdf4f7..4c46a055 100644
--- a/include/math.h
+++ b/include/math.h
@@ -1,6 +1,12 @@
 #ifndef _MATH_H
 #define _MATH_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __NEED_float_t
+#define __NEED_double_t
 #define __NEED___uint16_t
 #define __NEED___uint32_t
 #define __NEED___uint64_t
@@ -44,6 +50,28 @@ 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
+#if __STDC_VERSION__ >= 199901L
+inline
+#endif
+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 +327,8 @@ extern int signgam;
 double      scalb(double, double);
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif