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DataPRO/IService/.svn/pristine/77/77ecd04f82e2948e6d85a6476599db7ada882734.svn-base

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+using System;
+
+// ReSharper disable once CheckNamespace
+namespace DTS.DASLib.Service
+{
+    /// <inheritdoc />
+    /// <summary>
+    /// this attribute controls the minimum input range for a gain
+    /// note that we could calculate this, but this allows us some flexibility
+    /// in real life there are calibration and other factors that can affect what actually
+    /// is achievable at a given gain step, so this minimum input could be a theoretical one
+    /// http://fogbugz/fogbugz/default.asp?10080
+    /// </summary>
+    public class MinInputRangeAttribute : Attribute
+    {
+        /// <summary>
+        /// returns the minimum input range for a gain
+        /// http://fogbugz/fogbugz/default.asp?10080
+        /// </summary>
+        /// <param name="o"></param>
+        /// <returns></returns>
+        public static double GetMinInputRangemV(object o)
+        {
+            if (o == null) return 0D;
+            var mi = o.GetType().GetMember(o.ToString());
+            if (mi.Length <= 0) return 0D;
+            return GetCustomAttribute(mi[0], typeof(MinInputRangeAttribute)) is MinInputRangeAttribute attr ? attr._minimumInputRangemV : 0D;
+        }
+
+        private readonly double _minimumInputRangemV;
+        public MinInputRangeAttribute(double minInputRangemV)
+        {
+            _minimumInputRangemV = minInputRangemV;
+        }
+    }
+}