LoadManagedCodePage()

unsafe override void System.Text.SBCSCodePageEncoding.LoadManagedCodePage ( )

inlineprotected

Definition at line 54 of file SBCSCodePageEncoding.cs.

    {
        fixed (byte* ptr = &m_codePageHeader[0])
        {
            CodePageHeader* ptr2 = (CodePageHeader*)ptr;
            if (ptr2->ByteCount != 1)
            {
                throw new NotSupportedException(System.SR.Format(System.SR.NotSupported_NoCodepageData, CodePage));
            }
            _byteUnknown = (byte)ptr2->ByteReplace;
            _charUnknown = ptr2->UnicodeReplace;
            int num = 66052 + iExtraBytes;
            byte* nativeMemory = GetNativeMemory(num);
            Unsafe.InitBlockUnaligned(nativeMemory, 0, (uint)num);
            char* ptr3 = (char*)nativeMemory;
            byte* ptr4 = nativeMemory + 512;
            byte[] array = new byte[512];
            lock (BaseCodePageEncoding.s_streamLock)
            {
                BaseCodePageEncoding.s_codePagesEncodingDataStream.Seek(m_firstDataWordOffset, SeekOrigin.Begin);
                BaseCodePageEncoding.s_codePagesEncodingDataStream.Read(array, 0, array.Length);
            }
            fixed (byte* ptr5 = &array[0])
            {
                for (int i = 0; i < 256; i++)
                {
                    char c = (char)ReadUInt16(ptr5 + 2 * i);
                    if (c != 0 || i == 0)
                    {
                        ptr3[i] = c;
                        if (c != '\ufffd')
                        {
                            ptr4[(int)c] = (byte)i;
                        }
                    }
                    else
                    {
                        ptr3[i] = '\ufffd';
                    }
                }
            }
            _mapBytesToUnicode = ptr3;
            _mapUnicodeToBytes = ptr4;
        }
    }

References System.Text.SBCSCodePageEncoding._byteUnknown, System.Text.SBCSCodePageEncoding._charUnknown, System.Text.SBCSCodePageEncoding._mapBytesToUnicode, System.Text.SBCSCodePageEncoding._mapUnicodeToBytes, System.array, System.Text.BaseCodePageEncoding.CodePageHeader.ByteCount, System.Text.BaseCodePageEncoding.CodePageHeader.ByteReplace, System.Text.Encoding.CodePage, System.SR.Format(), System.Text.BaseCodePageEncoding.GetNativeMemory(), System.Text.BaseCodePageEncoding.iExtraBytes, System.Runtime.CompilerServices.Unsafe.InitBlockUnaligned(), System.Text.BaseCodePageEncoding.m_codePageHeader, System.Text.BaseCodePageEncoding.m_firstDataWordOffset, System.SR.NotSupported_NoCodepageData, System.Text.SBCSCodePageEncoding.ReadUInt16(), System.Text.BaseCodePageEncoding.s_codePagesEncodingDataStream, System.Text.BaseCodePageEncoding.s_streamLock, and System.Text.BaseCodePageEncoding.CodePageHeader.UnicodeReplace.