639 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			C#
		
	
	
			
		
		
	
	
			639 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			C#
		
	
	
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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#if COREFX
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using System.Linq;
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#endif
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#if PROFILE259
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using System.Reflection;
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using System.Linq;
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#else
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using System.Reflection;
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#endif
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namespace ProtoBuf
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{
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    /// <summary>
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    /// Not all frameworks are created equal (fx1.1 vs fx2.0,
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    /// micro-framework, compact-framework,
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    /// silverlight, etc). This class simply wraps up a few things that would
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    /// otherwise make the real code unnecessarily messy, providing fallback
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    /// implementations if necessary.
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    /// </summary>
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    internal sealed class Helpers
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    {
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        private Helpers() { }
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        public static StringBuilder AppendLine(StringBuilder builder)
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        {
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            return builder.AppendLine();
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        }
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        [System.Diagnostics.Conditional("DEBUG")]
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        public static void DebugWriteLine(string message, object obj)
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        {
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#if DEBUG
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            string suffix;
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            try
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            {
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                suffix = obj == null ? "(null)" : obj.ToString();
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            }
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            catch
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            {
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                suffix = "(exception)";
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            }
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            DebugWriteLine(message + ": " + suffix);
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#endif
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        }
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        [System.Diagnostics.Conditional("DEBUG")]
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        public static void DebugWriteLine(string message)
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        {
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#if DEBUG
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            System.Diagnostics.Debug.WriteLine(message);
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#endif
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        }
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        [System.Diagnostics.Conditional("TRACE")]
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        public static void TraceWriteLine(string message)
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        {
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#if TRACE
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#if CF2 || PORTABLE || COREFX || PROFILE259
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			System.Diagnostics.Debug.WriteLine(message);
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#else
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            System.Diagnostics.Trace.WriteLine(message);
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#endif
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#endif
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        }
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        [System.Diagnostics.Conditional("DEBUG")]
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        public static void DebugAssert(bool condition, string message)
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        {
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#if DEBUG
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            if (!condition)
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            {
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                System.Diagnostics.Debug.Assert(false, message);
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            }
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#endif
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        }
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        [System.Diagnostics.Conditional("DEBUG")]
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        public static void DebugAssert(bool condition, string message, params object[] args)
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        {
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#if DEBUG
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            if (!condition) DebugAssert(false, string.Format(message, args));
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#endif
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        }
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        [System.Diagnostics.Conditional("DEBUG")]
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        public static void DebugAssert(bool condition)
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        {
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#if DEBUG   
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            if (!condition && System.Diagnostics.Debugger.IsAttached) System.Diagnostics.Debugger.Break();
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            System.Diagnostics.Debug.Assert(condition);
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#endif
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        }
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#if !NO_RUNTIME
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        public static void Sort(int[] keys, object[] values)
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        {
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            // bubble-sort; it'll work on MF, has small code,
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            // and works well-enough for our sizes. This approach
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            // also allows us to do `int` compares without having
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            // to go via IComparable etc, so win:win
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            bool swapped;
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            do
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            {
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                swapped = false;
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                for (int i = 1; i < keys.Length; i++)
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                {
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                    if (keys[i - 1] > keys[i])
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                    {
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                        int tmpKey = keys[i];
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                        keys[i] = keys[i - 1];
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                        keys[i - 1] = tmpKey;
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                        object tmpValue = values[i];
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                        values[i] = values[i - 1];
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                        values[i - 1] = tmpValue;
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                        swapped = true;
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                    }
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                }
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            } while (swapped);
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        }
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#endif
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#if COREFX
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		internal static MemberInfo GetInstanceMember(TypeInfo declaringType, string name)
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        {
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            var members = declaringType.AsType().GetMember(name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
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            switch(members.Length)
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            {
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                case 0: return null;
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                case 1: return members[0];
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                default: throw new AmbiguousMatchException(name);
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            }
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        }
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name)
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        {
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            foreach (MethodInfo method in declaringType.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
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            {
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                if (method.Name == name) return method;
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(TypeInfo declaringType, string name)
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        {
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            return GetInstanceMethod(declaringType.AsType(), name); ;
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name)
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        {
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            foreach (MethodInfo method in declaringType.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic))
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            {
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                if (method.Name == name) return method;
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            }
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            return null;
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        }
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        internal static MethodInfo GetStaticMethod(TypeInfo declaringType, string name)
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        {
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            return GetStaticMethod(declaringType.AsType(), name);
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name, Type[] parameterTypes)
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        {
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            foreach(MethodInfo method in declaringType.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic))
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            {
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                if (method.Name == name && IsMatch(method.GetParameters(), parameterTypes)) return method;
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name, Type[] parameterTypes)
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        {
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            foreach (MethodInfo method in declaringType.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
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            {
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                if (method.Name == name && IsMatch(method.GetParameters(), parameterTypes)) return method;
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(TypeInfo declaringType, string name, Type[] types)
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        {
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            return GetInstanceMethod(declaringType.AsType(), name, types);
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        }
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#elif PROFILE259
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        internal static MemberInfo GetInstanceMember(TypeInfo declaringType, string name)
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        {
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            IEnumerable<MemberInfo> members = declaringType.DeclaredMembers;
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            IList<MemberInfo> found = new List<MemberInfo>();
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            foreach (MemberInfo member in members)
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            {
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                if (member.Name.Equals(name))
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                {
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                    found.Add(member);
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                }
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            }
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            switch (found.Count)
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            {
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                case 0: return null;
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                case 1: return found.First();
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                default: throw new AmbiguousMatchException(name);
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            }
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        }
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name)
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        {
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            var methods = declaringType.GetRuntimeMethods();
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            foreach (MethodInfo method in methods)
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            {
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                if (method.Name == name)
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                {
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                    return method;
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                }
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(TypeInfo declaringType, string name)
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        {
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            return GetInstanceMethod(declaringType.AsType(), name); ;
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name)
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        {
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            var methods = declaringType.GetRuntimeMethods();
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            foreach (MethodInfo method in methods)
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            {
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                if (method.Name == name)
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                {
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                    return method;
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                }
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            }
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            return null;
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        }
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        internal static MethodInfo GetStaticMethod(TypeInfo declaringType, string name)
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        {
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            return GetStaticMethod(declaringType.AsType(), name);
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name, Type[] parameterTypes)
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        {
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            var methods = declaringType.GetRuntimeMethods();
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            foreach (MethodInfo method in methods)
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            {
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                if (method.Name == name &&
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                    IsMatch(method.GetParameters(), parameterTypes))
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                {
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                    return method;
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                }
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name, Type[] parameterTypes)
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        {
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            var methods = declaringType.GetRuntimeMethods();
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            foreach (MethodInfo method in methods)
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            {
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                if (method.Name == name &&
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                    IsMatch(method.GetParameters(), parameterTypes))
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                {
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                    return method;
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                }
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            }
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            return null;
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        }
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        internal static MethodInfo GetInstanceMethod(TypeInfo declaringType, string name, Type[] types)
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        {
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            return GetInstanceMethod(declaringType.AsType(), name, types);
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        }
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#else
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name)
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        {
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            return declaringType.GetMethod(name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name)
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        {
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            return declaringType.GetMethod(name, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
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        }
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        internal static MethodInfo GetStaticMethod(Type declaringType, string name, Type[] parameterTypes)
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        {
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#if PORTABLE
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            foreach (MethodInfo method in declaringType.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic))
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            {
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                if (method.Name == name && IsMatch(method.GetParameters(), parameterTypes)) return method;
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            }
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            return null;
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#else
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            return declaringType.GetMethod(name, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic, null, parameterTypes, null);
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#endif
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        }
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        internal static MethodInfo GetInstanceMethod(Type declaringType, string name, Type[] types)
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        {
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            if (types == null) types = EmptyTypes;
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#if PORTABLE || COREFX
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            MethodInfo method = declaringType.GetMethod(name, types);
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            if (method != null && method.IsStatic) method = null;
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            return method;
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#else
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            return declaringType.GetMethod(name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
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                null, types, null);
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#endif
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        }
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#endif
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        internal static bool IsSubclassOf(Type type, Type baseClass)
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        {
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#if COREFX || PROFILE259
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            return type.GetTypeInfo().IsSubclassOf(baseClass);
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#else
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            return type.IsSubclassOf(baseClass);
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#endif
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        }
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        public readonly static Type[] EmptyTypes =
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#if PORTABLE || CF2 || CF35 || PROFILE259
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            new Type[0];
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#else
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            Type.EmptyTypes;
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#endif
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#if COREFX || PROFILE259
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        private static readonly Type[] knownTypes = new Type[] {
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                typeof(bool), typeof(char), typeof(sbyte), typeof(byte),
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                typeof(short), typeof(ushort), typeof(int), typeof(uint),
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                typeof(long), typeof(ulong), typeof(float), typeof(double),
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                typeof(decimal), typeof(string),
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                typeof(DateTime), typeof(TimeSpan), typeof(Guid), typeof(Uri),
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                typeof(byte[]), typeof(Type)};
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        private static readonly ProtoTypeCode[] knownCodes = new ProtoTypeCode[] {
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            ProtoTypeCode.Boolean, ProtoTypeCode.Char, ProtoTypeCode.SByte, ProtoTypeCode.Byte,
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            ProtoTypeCode.Int16, ProtoTypeCode.UInt16, ProtoTypeCode.Int32, ProtoTypeCode.UInt32,
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            ProtoTypeCode.Int64, ProtoTypeCode.UInt64, ProtoTypeCode.Single, ProtoTypeCode.Double,
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            ProtoTypeCode.Decimal, ProtoTypeCode.String,
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            ProtoTypeCode.DateTime, ProtoTypeCode.TimeSpan, ProtoTypeCode.Guid, ProtoTypeCode.Uri,
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            ProtoTypeCode.ByteArray, ProtoTypeCode.Type
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        };
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#endif
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        public static ProtoTypeCode GetTypeCode(Type type)
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        {
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#if COREFX || PROFILE259
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            if (IsEnum(type))
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            {
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                type = Enum.GetUnderlyingType(type);
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            }
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            int idx = Array.IndexOf<Type>(knownTypes, type);
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            if (idx >= 0) return knownCodes[idx];
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            return type == null ? ProtoTypeCode.Empty : ProtoTypeCode.Unknown;
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#else
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            TypeCode code = Type.GetTypeCode(type);
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            switch (code)
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            {
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                case TypeCode.Empty:
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                case TypeCode.Boolean:
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                case TypeCode.Char:
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                case TypeCode.SByte:
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                case TypeCode.Byte:
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                case TypeCode.Int16:
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                case TypeCode.UInt16:
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                case TypeCode.Int32:
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                case TypeCode.UInt32:
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                case TypeCode.Int64:
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                case TypeCode.UInt64:
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                case TypeCode.Single:
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                case TypeCode.Double:
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                case TypeCode.Decimal:
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                case TypeCode.DateTime:
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                case TypeCode.String:
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                    return (ProtoTypeCode)code;
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            }
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            if (type == typeof(TimeSpan)) return ProtoTypeCode.TimeSpan;
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            if (type == typeof(Guid)) return ProtoTypeCode.Guid;
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            if (type == typeof(Uri)) return ProtoTypeCode.Uri;
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#if PORTABLE
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            // In PCLs, the Uri type may not match (WinRT uses Internal/Uri, .Net uses System/Uri), so match on the full name instead
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            if (type.FullName == typeof(Uri).FullName) return ProtoTypeCode.Uri;
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#endif
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            if (type == typeof(byte[])) return ProtoTypeCode.ByteArray;
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            if (type == typeof(Type)) return ProtoTypeCode.Type;
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            return ProtoTypeCode.Unknown;
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#endif
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        }
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        internal static Type GetUnderlyingType(Type type)
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        {
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            return Nullable.GetUnderlyingType(type);
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        }
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        internal static bool IsValueType(Type type)
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        {
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#if COREFX || PROFILE259
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            return type.GetTypeInfo().IsValueType;
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#else
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            return type.IsValueType;
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#endif
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        }
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        internal static bool IsSealed(Type type)
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        {
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#if COREFX || PROFILE259
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            return type.GetTypeInfo().IsSealed;
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#else
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            return type.IsSealed;
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#endif
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        }
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        internal static bool IsClass(Type type)
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        {
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#if COREFX || PROFILE259
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            return type.GetTypeInfo().IsClass;
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#else
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            return type.IsClass;
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#endif
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        }
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        internal static bool IsEnum(Type type)
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        {
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#if COREFX || PROFILE259
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            return type.GetTypeInfo().IsEnum;
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#else
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            return type.IsEnum;
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#endif
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        }
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        internal static MethodInfo GetGetMethod(PropertyInfo property, bool nonPublic, bool allowInternal)
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        {
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            if (property == null) return null;
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#if COREFX || PROFILE259
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            MethodInfo method = property.GetMethod;
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            if (!nonPublic && method != null && !method.IsPublic) method = null;
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            return method;
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#else
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            MethodInfo method = property.GetGetMethod(nonPublic);
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            if (method == null && !nonPublic && allowInternal)
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            { // could be "internal" or "protected internal"; look for a non-public, then back-check
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                method = property.GetGetMethod(true);
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                if (method == null && !(method.IsAssembly || method.IsFamilyOrAssembly))
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                {
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                    method = null;
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                }
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            }
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            return method;
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#endif
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        }
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        internal static MethodInfo GetSetMethod(PropertyInfo property, bool nonPublic, bool allowInternal)
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        {
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            if (property == null) return null;
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#if COREFX || PROFILE259
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            MethodInfo method = property.SetMethod;
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            if (!nonPublic && method != null && !method.IsPublic) method = null;
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            return method;
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#else
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            MethodInfo method = property.GetSetMethod(nonPublic);
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            if (method == null && !nonPublic && allowInternal)
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            { // could be "internal" or "protected internal"; look for a non-public, then back-check
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                method = property.GetGetMethod(true);
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                if (method == null && !(method.IsAssembly || method.IsFamilyOrAssembly))
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                {
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                    method = null;
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                }
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            }
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            return method;
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#endif
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        }
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#if COREFX || PORTABLE || PROFILE259
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        private static bool IsMatch(ParameterInfo[] parameters, Type[] parameterTypes)
 | 
						|
        {
 | 
						|
            if (parameterTypes == null) parameterTypes = EmptyTypes;
 | 
						|
            if (parameters.Length != parameterTypes.Length) return false;
 | 
						|
            for (int i = 0; i < parameters.Length; i++)
 | 
						|
            {
 | 
						|
                if (parameters[i].ParameterType != parameterTypes[i]) return false;
 | 
						|
            }
 | 
						|
            return true;
 | 
						|
        }
 | 
						|
#endif
 | 
						|
#if COREFX || PROFILE259
 | 
						|
        internal static ConstructorInfo GetConstructor(Type type, Type[] parameterTypes, bool nonPublic)
 | 
						|
        {
 | 
						|
            return GetConstructor(type.GetTypeInfo(), parameterTypes, nonPublic);
 | 
						|
        }
 | 
						|
        internal static ConstructorInfo GetConstructor(TypeInfo type, Type[] parameterTypes, bool nonPublic)
 | 
						|
        {
 | 
						|
            return GetConstructors(type, nonPublic).SingleOrDefault(ctor => IsMatch(ctor.GetParameters(), parameterTypes));
 | 
						|
        }
 | 
						|
        internal static ConstructorInfo[] GetConstructors(TypeInfo typeInfo, bool nonPublic)
 | 
						|
        {
 | 
						|
            return typeInfo.DeclaredConstructors.Where(c => !c.IsStatic && ((!nonPublic && c.IsPublic) || nonPublic)).ToArray();
 | 
						|
        }
 | 
						|
        internal static PropertyInfo GetProperty(Type type, string name, bool nonPublic)
 | 
						|
        {
 | 
						|
            return GetProperty(type.GetTypeInfo(), name, nonPublic);
 | 
						|
        }
 | 
						|
        internal static PropertyInfo GetProperty(TypeInfo type, string name, bool nonPublic)
 | 
						|
        {
 | 
						|
            return type.GetDeclaredProperty(name);
 | 
						|
        }
 | 
						|
#else
 | 
						|
 | 
						|
        internal static ConstructorInfo GetConstructor(Type type, Type[] parameterTypes, bool nonPublic)
 | 
						|
        {
 | 
						|
#if PORTABLE || COREFX
 | 
						|
            // pretty sure this will only ever return public, but...
 | 
						|
            ConstructorInfo ctor = type.GetConstructor(parameterTypes);
 | 
						|
            return (ctor != null && (nonPublic || ctor.IsPublic)) ? ctor : null;
 | 
						|
#else
 | 
						|
            return type.GetConstructor(
 | 
						|
                nonPublic ? BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic
 | 
						|
                          : BindingFlags.Instance | BindingFlags.Public,
 | 
						|
                    null, parameterTypes, null);
 | 
						|
#endif
 | 
						|
 | 
						|
        }
 | 
						|
        internal static ConstructorInfo[] GetConstructors(Type type, bool nonPublic)
 | 
						|
        {
 | 
						|
            return type.GetConstructors(
 | 
						|
                nonPublic ? BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic
 | 
						|
                          : BindingFlags.Instance | BindingFlags.Public);
 | 
						|
        }
 | 
						|
        internal static PropertyInfo GetProperty(Type type, string name, bool nonPublic)
 | 
						|
        {
 | 
						|
            return type.GetProperty(name,
 | 
						|
                nonPublic ? BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic
 | 
						|
                          : BindingFlags.Instance | BindingFlags.Public);
 | 
						|
        }
 | 
						|
#endif
 | 
						|
 | 
						|
 | 
						|
        internal static object ParseEnum(Type type, string value)
 | 
						|
        {
 | 
						|
            return Enum.Parse(type, value, true);
 | 
						|
        }
 | 
						|
 | 
						|
 | 
						|
        internal static MemberInfo[] GetInstanceFieldsAndProperties(Type type, bool publicOnly)
 | 
						|
        {
 | 
						|
#if PROFILE259
 | 
						|
            var members = new List<MemberInfo>();
 | 
						|
            foreach (FieldInfo field in type.GetRuntimeFields())
 | 
						|
            {
 | 
						|
                if (field.IsStatic) continue;
 | 
						|
                if (field.IsPublic || !publicOnly) members.Add(field);
 | 
						|
            }
 | 
						|
            foreach (PropertyInfo prop in type.GetRuntimeProperties())
 | 
						|
            {
 | 
						|
                MethodInfo getter = Helpers.GetGetMethod(prop, true, true);
 | 
						|
                if (getter == null || getter.IsStatic) continue;
 | 
						|
                if (getter.IsPublic || !publicOnly) members.Add(prop);
 | 
						|
            }
 | 
						|
            return members.ToArray();
 | 
						|
#else
 | 
						|
            BindingFlags flags = publicOnly ? BindingFlags.Public | BindingFlags.Instance : BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic;
 | 
						|
            PropertyInfo[] props = type.GetProperties(flags);
 | 
						|
            FieldInfo[] fields = type.GetFields(flags);
 | 
						|
            MemberInfo[] members = new MemberInfo[fields.Length + props.Length];
 | 
						|
            props.CopyTo(members, 0);
 | 
						|
            fields.CopyTo(members, props.Length);
 | 
						|
            return members;
 | 
						|
#endif
 | 
						|
        }
 | 
						|
 | 
						|
        internal static Type GetMemberType(MemberInfo member)
 | 
						|
        {
 | 
						|
#if PORTABLE || COREFX || PROFILE259
 | 
						|
            if (member is PropertyInfo prop) return prop.PropertyType;
 | 
						|
            FieldInfo fld = member as FieldInfo;
 | 
						|
            return fld?.FieldType;
 | 
						|
#else
 | 
						|
            switch (member.MemberType)
 | 
						|
            {
 | 
						|
                case MemberTypes.Field: return ((FieldInfo)member).FieldType;
 | 
						|
                case MemberTypes.Property: return ((PropertyInfo)member).PropertyType;
 | 
						|
                default: return null;
 | 
						|
            }
 | 
						|
#endif
 | 
						|
        }
 | 
						|
 | 
						|
        internal static bool IsAssignableFrom(Type target, Type type)
 | 
						|
        {
 | 
						|
#if PROFILE259
 | 
						|
            return target.GetTypeInfo().IsAssignableFrom(type.GetTypeInfo());
 | 
						|
#else
 | 
						|
            return target.IsAssignableFrom(type);
 | 
						|
#endif
 | 
						|
        }
 | 
						|
        internal static Assembly GetAssembly(Type type)
 | 
						|
        {
 | 
						|
#if COREFX || PROFILE259
 | 
						|
            return type.GetTypeInfo().Assembly;
 | 
						|
#else
 | 
						|
            return type.Assembly;
 | 
						|
#endif
 | 
						|
        }
 | 
						|
        internal static byte[] GetBuffer(MemoryStream ms)
 | 
						|
        {
 | 
						|
#if COREFX
 | 
						|
            if(!ms.TryGetBuffer(out var segment))
 | 
						|
            {
 | 
						|
                throw new InvalidOperationException("Unable to obtain underlying MemoryStream buffer");
 | 
						|
            } else if(segment.Offset != 0)
 | 
						|
            {
 | 
						|
                throw new InvalidOperationException("Underlying MemoryStream buffer was not zero-offset");
 | 
						|
            } else
 | 
						|
            {
 | 
						|
                return segment.Array;
 | 
						|
            }
 | 
						|
#elif PORTABLE || PROFILE259
 | 
						|
            return ms.ToArray();
 | 
						|
#else
 | 
						|
            return ms.GetBuffer();
 | 
						|
#endif
 | 
						|
        }
 | 
						|
    }
 | 
						|
    /// <summary>
 | 
						|
    /// Intended to be a direct map to regular TypeCode, but:
 | 
						|
    /// - with missing types
 | 
						|
    /// - existing on WinRT
 | 
						|
    /// </summary>
 | 
						|
    internal enum ProtoTypeCode
 | 
						|
    {
 | 
						|
        Empty = 0,
 | 
						|
        Unknown = 1, // maps to TypeCode.Object
 | 
						|
        Boolean = 3,
 | 
						|
        Char = 4,
 | 
						|
        SByte = 5,
 | 
						|
        Byte = 6,
 | 
						|
        Int16 = 7,
 | 
						|
        UInt16 = 8,
 | 
						|
        Int32 = 9,
 | 
						|
        UInt32 = 10,
 | 
						|
        Int64 = 11,
 | 
						|
        UInt64 = 12,
 | 
						|
        Single = 13,
 | 
						|
        Double = 14,
 | 
						|
        Decimal = 15,
 | 
						|
        DateTime = 16,
 | 
						|
        String = 18,
 | 
						|
 | 
						|
        // additions
 | 
						|
        TimeSpan = 100,
 | 
						|
        ByteArray = 101,
 | 
						|
        Guid = 102,
 | 
						|
        Uri = 103,
 | 
						|
        Type = 104
 | 
						|
    }
 | 
						|
}
 |