Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Text / BinHexEncoding.cs / 1305376 / BinHexEncoding.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.Text { using System.Globalization; using System.Runtime; using System.Runtime.Serialization; //For SR using System.Security; class BinHexEncoding : Encoding { static byte[] char2val = new byte[128] { /* 0-15 */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 16-31 */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 32-47 */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 48-63 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 64-79 */ 0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 80-95 */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 96-111 */ 0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 112-127 */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, }; static string val2char = "0123456789ABCDEF"; #if DEBUG static BinHexEncoding() { for (char ch = '0'; ch <= '9'; ch++) { Fx.Assert(char2val[ch] == ch - '0', ""); } for (char ch = 'A'; ch <= 'F'; ch++) { Fx.Assert(char2val[ch] == ch - 'A' + 10, ""); } for (char ch = 'a'; ch <= 'f'; ch++) { Fx.Assert(char2val[ch] == ch - 'a' + 10, ""); } } #endif public override int GetMaxByteCount(int charCount) { if (charCount < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charCount", SR.GetString(SR.ValueMustBeNonNegative))); if ((charCount % 2) != 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SR.GetString(SR.XmlInvalidBinHexLength, charCount.ToString(NumberFormatInfo.CurrentInfo)))); return charCount / 2; } public override int GetByteCount(char[] chars, int index, int count) { return GetMaxByteCount(count); } [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.", Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")] [SecuritySafeCritical] unsafe public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex) { if (chars == null) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("chars")); if (charIndex < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charIndex", SR.GetString(SR.ValueMustBeNonNegative))); if (charIndex > chars.Length) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charIndex", SR.GetString(SR.OffsetExceedsBufferSize, chars.Length))); if (charCount < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charCount", SR.GetString(SR.ValueMustBeNonNegative))); if (charCount > chars.Length - charIndex) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charCount", SR.GetString(SR.SizeExceedsRemainingBufferSpace, chars.Length - charIndex))); if (bytes == null) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("bytes")); if (byteIndex < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteIndex", SR.GetString(SR.ValueMustBeNonNegative))); if (byteIndex > bytes.Length) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteIndex", SR.GetString(SR.OffsetExceedsBufferSize, bytes.Length))); int byteCount = GetByteCount(chars, charIndex, charCount); if (byteCount < 0 || byteCount > bytes.Length - byteIndex) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.XmlArrayTooSmall), "bytes")); if (charCount > 0) { fixed (byte* _char2val = char2val) { fixed (byte* _bytes = &bytes[byteIndex]) { fixed (char* _chars = &chars[charIndex]) { char* pch = _chars; char* pchMax = _chars + charCount; byte* pb = _bytes; while (pch < pchMax) { Fx.Assert(pch + 2 <= pchMax, ""); char pch0 = pch[0]; char pch1 = pch[1]; if ((pch0 | pch1) >= 128) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SR.GetString(SR.XmlInvalidBinHexSequence, new string(pch, 0, 2), charIndex + (int)(pch - _chars)))); byte d1 = _char2val[pch0]; byte d2 = _char2val[pch1]; if ((d1 | d2) == 0xFF) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SR.GetString(SR.XmlInvalidBinHexSequence, new string(pch, 0, 2), charIndex + (int)(pch - _chars)))); pb[0] = (byte)((d1 << 4) + d2); pch += 2; pb++; } } } } } return byteCount; } #if NO public override Encoder GetEncoder() { return new BufferedEncoder(this, 2); } #endif public override int GetMaxCharCount(int byteCount) { if (byteCount < 0 || byteCount > int.MaxValue / 2) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteCount", SR.GetString(SR.ValueMustBeInRange, 0, int.MaxValue / 2))); return byteCount * 2; } public override int GetCharCount(byte[] bytes, int index, int count) { return GetMaxCharCount(count); } [Fx.Tag.SecurityNote(Critical = "Contains unsafe code.", Safe = "Unsafe code is effectively encapsulated, all inputs are validated.")] [SecuritySafeCritical] unsafe public override int GetChars(byte[] bytes, int byteIndex, int byteCount, char[] chars, int charIndex) { if (bytes == null) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("bytes")); if (byteIndex < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteIndex", SR.GetString(SR.ValueMustBeNonNegative))); if (byteIndex > bytes.Length) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteIndex", SR.GetString(SR.OffsetExceedsBufferSize, bytes.Length))); if (byteCount < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteCount", SR.GetString(SR.ValueMustBeNonNegative))); if (byteCount > bytes.Length - byteIndex) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("byteCount", SR.GetString(SR.SizeExceedsRemainingBufferSpace, bytes.Length - byteIndex))); int charCount = GetCharCount(bytes, byteIndex, byteCount); if (chars == null) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("chars")); if (charIndex < 0) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charIndex", SR.GetString(SR.ValueMustBeNonNegative))); if (charIndex > chars.Length) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("charIndex", SR.GetString(SR.OffsetExceedsBufferSize, chars.Length))); if (charCount < 0 || charCount > chars.Length - charIndex) throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.XmlArrayTooSmall), "chars")); if (byteCount > 0) { fixed (char *_val2char = val2char) { fixed (byte *_bytes = &bytes[byteIndex]) { fixed (char *_chars = &chars[charIndex]) { char *pch = _chars; byte *pb = _bytes; byte *pbMax = _bytes + byteCount; while (pb < pbMax) { pch[0] = _val2char[pb[0] >> 4]; pch[1] = _val2char[pb[0] & 0x0F]; pb++; pch += 2; } } } } } return charCount; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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