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//-----------------------------------------------------------------------------
// 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;
}
}
}
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