Fixed glm::detail::nextafter implementation

glm/gtx/ulp.inl

@@ -20,8 +20,8 @@
  * is preserved.
  * ====================================================
  */
-/*
+
-#define EXTRACT_WORDS(ix0,ix1,d)                                \
+#define GLM_EXTRACT_WORDS(ix0,ix1,d)                                \
 do {                                                            \
   ieee_double_shape_type ew_u;                                  \
   ew_u.value = (d);                                             \
@@ -29,21 +29,21 @@ do {                                                            \
   (ix1) = ew_u.parts.lsw;                                       \
 } while (0)
 
-#define GET_FLOAT_WORD(i,d)                                     \
+#define GLM_GET_FLOAT_WORD(i,d)                                     \
 do {                                                            \
   ieee_float_shape_type gf_u;                                   \
   gf_u.value = (d);                                             \
   (i) = gf_u.word;                                              \
 } while (0)
 
-#define SET_FLOAT_WORD(d,i)                                     \
+#define GLM_SET_FLOAT_WORD(d,i)                                     \
 do {                                                            \
   ieee_float_shape_type sf_u;                                   \
   sf_u.word = (i);                                              \
   (d) = sf_u.value;                                             \
 } while (0)
 
-#define INSERT_WORDS(d,ix0,ix1)                                 \
+#define GLM_INSERT_WORDS(d,ix0,ix1)                                 \
 do {                                                            \
   ieee_double_shape_type iw_u;                                  \
   iw_u.parts.msw = (ix0);                                       \
@@ -51,13 +51,16 @@ do {                                                            \
   (d) = iw_u.value;                                             \
 } while (0)
 
-float nextafterf(float x, float y)
+namespace glm{
+namespace detail
+{
+	GLM_FUNC_QUALIFIER float nextafterf(float x, float y)
 	{
 		volatile float t;
-        int32_t hx,hy,ix,iy;
+		glm::int32 hx, hy, ix, iy;
 
-        GET_FLOAT_WORD(hx,x);
+		GLM_GET_FLOAT_WORD(hx,x);
-        GET_FLOAT_WORD(hy,y);
+		GLM_GET_FLOAT_WORD(hy,y);
 		ix = hx&0x7fffffff;             // |x|
 		iy = hy&0x7fffffff;             // |y|
 
@@ -66,7 +69,7 @@ float nextafterf(float x, float y)
 			return x+y;
 		if(x==y) return y;              // x=y, return y
 		if(ix==0) {                             // x == 0
-            SET_FLOAT_WORD(x,(hy&0x80000000)|1);// return +-minsubnormal
+			GLM_SET_FLOAT_WORD(x,(hy&0x80000000)|1);// return +-minsubnormal
 			t = x*x;
 			if(t==x) return t; else return x;   // raise underflow flag
 		}
@@ -88,23 +91,22 @@ float nextafterf(float x, float y)
 		if(hy<0x00800000) {             // underflow
 			t = x*x;
 			if(t!=x) {          // raise underflow flag
-                SET_FLOAT_WORD(y,hx);
+				GLM_SET_FLOAT_WORD(y,hx);
 				return y;
 			}
 		}
-        SET_FLOAT_WORD(x,hx);
+		GLM_SET_FLOAT_WORD(x,hx);
 		return x;
 	}
-*/
+
-/*
+	GLM_FUNC_QUALIFIER double nextafter(double x, double y)
-double nextafter(double x, double y)
 	{
 		volatile double t;
-        int32_t hx,hy,ix,iy;
+		glm::int32 hx, hy, ix, iy;
-        u_int32_t lx,ly;
+		glm::uint32 lx, ly;
 
-        EXTRACT_WORDS(hx,lx,x);
+		GLM_EXTRACT_WORDS(hx, lx, x);
-        EXTRACT_WORDS(hy,ly,y);
+		GLM_EXTRACT_WORDS(hy, ly, y);
 		ix = hx & 0x7fffffff;             // |x| 
 		iy = hy & 0x7fffffff;             // |y| 
 
@@ -113,7 +115,7 @@ double nextafter(double x, double y)
 			return x+y;
 		if(x==y) return y;              // x=y, return y
 		if((ix|lx)==0) {                        // x == 0 
-            INSERT_WORDS(x,hy&0x80000000,1);    // return +-minsubnormal
+			GLM_INSERT_WORDS(x, hy & 0x80000000, 1);    // return +-minsubnormal
 			t = x*x;
 			if(t==x) return t; else return x;   // raise underflow flag 
 		}
@@ -139,25 +141,26 @@ double nextafter(double x, double y)
 		if(hy<0x00100000) {             // underflow
 			t = x*x;
 			if(t!=x) {          // raise underflow flag
-                INSERT_WORDS(y,hx,lx);
+				GLM_INSERT_WORDS(y,hx,lx);
 				return y;
 			}
 		}
-        INSERT_WORDS(x,hx,lx);
+		GLM_INSERT_WORDS(x,hx,lx);
 		return x;
 	}
-*/
+}//namespace detail
+}//namespace glm
 
 #if(GLM_COMPILER & GLM_COMPILER_VC)
 #	if(GLM_MODEL == GLM_MODEL_32)
-#		define GLM_NEXT_AFTER_FLT(x, toward) (float)_nextafter(x, float(toward))
+#		define GLM_NEXT_AFTER_FLT(x, toward) glm::detail::nextafter((x), (toward))
 #	else
-#		define GLM_NEXT_AFTER_FLT(x, toward) _nextafterf(x, toward)
+#		define GLM_NEXT_AFTER_FLT(x, toward) _nextafterf((x), (toward))
 #	endif
-#   define GLM_NEXT_AFTER_DBL(x, toward) _nextafter(x, toward)
+#   define GLM_NEXT_AFTER_DBL(x, toward) _nextafter((x), (toward))
 #else
-#   define GLM_NEXT_AFTER_FLT(x, toward) nextafterf(x, toward)
+#   define GLM_NEXT_AFTER_FLT(x, toward) nextafterf((x), (toward))
-#   define GLM_NEXT_AFTER_DBL(x, toward) nextafter(x, toward)
+#   define GLM_NEXT_AFTER_DBL(x, toward) nextafter((x), (toward))
 #endif
 
 namespace glm{