re-added old float rounding native

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40842

core/smn_float.cpp

@@ -230,6 +230,42 @@ static cell_t sm_ArcTangent2(IPluginContext *pCtx, const cell_t *params)
 	return sp_ftoc(val1);
 }
 
+static cell_t sm_FloatRound(IPluginContext *pCtx, const cell_t *params)
+{
+	float val = sp_ctof(params[1]);
+
+	switch (params[2])
+	{
+	case 1:
+		{
+			val = floor(val);
+			break;
+		}
+	case 2:
+		{
+			val = ceil(val);
+			break;
+		}
+	case 3:
+		{
+			if (val >= 0.0f)
+			{
+				val = floor(val);
+			} else {
+				val = ceil(val);
+			}
+			break;
+		}
+	default:
+		{
+			val = (float)floor(val + 0.5f);
+			break;
+		}
+	}
+
+	return static_cast<int>(val);
+}
+
 REGISTER_NATIVES(floatnatives)
 {
 	{"float",			sm_float},
@@ -255,5 +291,6 @@ REGISTER_NATIVES(floatnatives)
 	{"ArcCosine",		sm_ArcCosine},
 	{"ArcSine",			sm_ArcSine},
 	{"ArcTangent2",		sm_ArcTangent2},
+	{"FloatRound",		sm_FloatRound},			/* Backwards compat shim */
 	{NULL,				NULL}
 };

plugins/include/float.inc

@@ -212,6 +212,23 @@ native Float:ArcSine(Float:angle);
  */
 native Float:ArcTangent2(Float:x, Float:y);
 
+/**
+ * Different methods of rounding.
+ */
+enum floatround_method
+{
+	floatround_round = 0,		/**< Standard IEEE rounding */
+	floatround_floor,			/**< Next lowest integer value. */
+	floatround_ceil,			/**< Next highest integer value. */
+	floatround_tozero			/** Closest integer to zero. */
+};
+
+/**
+ * Backwards compatibility - use RoundToNearest or any of the other rounding natives.
+ * @deprecated
+ */
+native FloatRound(Float:value, floatround_method:method=floatround_round);
+
 /**
  * User defined operators.
  *