Native.cs source code in C# .NET

Source code for the .NET framework in C#



/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Shared / MS / Internal / Ink / Native.cs / 1 / Native.cs

                            using System; 
using System.Security;
using System.Runtime.InteropServices;

namespace MS.Internal.Ink 
    internal static class Native 
        /// Initialize the constants 
        ///     Critical: Critical as this code invokes Marshal.SizeOf which uses LinkDemand for UnmanagedCode permission.
        ///     TreatAsSafe: The method doesn't take any user inputs. It only pre-computes the size of our internal types. 
        [SecurityCritical, SecurityTreatAsSafe] 
        static Native() 
            // NOTICE-2005/10/14-[....], 
            // Make sure those lengths are indepentent from the 32bit or 64bit platform. Otherwise it could
            // break the ISF format.
            SizeOfInt = (uint)Marshal.SizeOf(typeof(int));
            SizeOfUInt = (uint)Marshal.SizeOf(typeof(uint)); 
            SizeOfUShort = (uint)Marshal.SizeOf(typeof(ushort));
            SizeOfByte = (uint)Marshal.SizeOf(typeof(byte)); 
            SizeOfFloat = (uint)Marshal.SizeOf(typeof(float)); 
            SizeOfDouble = (uint)Marshal.SizeOf(typeof(double));
            SizeOfGuid = (uint)Marshal.SizeOf(typeof(Guid)); 
            SizeOfDecimal = (uint)Marshal.SizeOf(typeof(decimal));

        internal static readonly uint SizeOfInt;      // Size of an int 
        internal static readonly uint SizeOfUInt;     // Size of an unsigned int
        internal static readonly uint SizeOfUShort;   // Size of an unsigned short 
        internal static readonly uint SizeOfByte;     // Size of a byte 
        internal static readonly uint SizeOfFloat;    // Size of a float
        internal static readonly uint SizeOfDouble;   // Size of a double 
        internal static readonly uint SizeOfGuid;    // Size of a GUID
        internal static readonly uint SizeOfDecimal; // Size of a VB-style Decimal

        internal const int BitsPerByte = 8;    // number of bits in a byte 
        internal const int BitsPerShort = 16;    // number of bits in one short - 2 bytes
        internal const int BitsPerInt = 32;    // number of bits in one integer - 4 bytes 
        internal const int BitsPerLong = 64;    // number of bits in one long - 8 bytes 

        // since casting from floats have mantisaa components,
        //      casts from float to int are not constrained by
        //      Int32.MaxValue, but by the maximum float value
        //      whose mantissa component is still within range 
        //      of an integer. Anything larger will cause an overflow.
        internal const int MaxFloatToIntValue = 2147483584 - 1; // 2.14748e+009 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.


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