private string GetSubstitute(char ch)
{
return(AsciiEncoderFallback.GetCharacterFallback(ch));
}
/// <summary>
/// Encodes the character.
/// </summary>
/// <param name="ch">The character to encode.</param>
/// <param name="outputBuffer">The output buffer.</param>
/// <param name="outputBufferCount">The output buffer count.</param>
/// <param name="outputEnd">The output end.</param>
/// <returns>
/// <c>true</c> if encoding is successful; otherwise, <c>false</c>.
/// </returns>
bool IFallback.FallBackChar(char ch, char[] outputBuffer, ref int outputBufferCount, int outputEnd)
{
if (this.htmlEscape)
{
HtmlEntityIndex namedEntityId = 0;
if (ch <= '>')
{
if (ch == '>')
{
namedEntityId = HtmlEntityIndex.gt;
}
else if (ch == '<')
{
namedEntityId = HtmlEntityIndex.lt;
}
else if (ch == '&')
{
namedEntityId = HtmlEntityIndex.amp;
}
else if (ch == '\"')
{
namedEntityId = HtmlEntityIndex.quot;
}
}
else if ((char)0xA0 <= ch && ch <= (char)0xFF)
{
namedEntityId = HtmlSupport.EntityMap[(int)ch - 0xA0];
}
if ((int)namedEntityId != 0)
{
string strQuote = HtmlNameData.entities[(int)namedEntityId].name;
if (outputEnd - outputBufferCount < strQuote.Length + 2)
{
return(false);
}
outputBuffer[outputBufferCount++] = '&';
strQuote.CopyTo(0, outputBuffer, outputBufferCount, strQuote.Length);
outputBufferCount += strQuote.Length;
outputBuffer[outputBufferCount++] = ';';
}
else
{
uint value = (uint)ch;
int len = (value < 0x10) ? 1 : (value < 0x100) ? 2 : (value < 0x1000) ? 3 : 4;
if (outputEnd - outputBufferCount < len + 4)
{
return(false);
}
outputBuffer[outputBufferCount++] = '&';
outputBuffer[outputBufferCount++] = '#';
outputBuffer[outputBufferCount++] = 'x';
int offset = outputBufferCount + len;
while (value != 0)
{
uint digit = value & 0xF;
outputBuffer[--offset] = (char)(digit + (digit < 10 ? '0' : 'A' - 10));
value >>= 4;
}
outputBufferCount += len;
outputBuffer[outputBufferCount++] = ';';
}
}
else
{
string substitute = AsciiEncoderFallback.GetCharacterFallback(ch);
if (substitute != null)
{
if (outputEnd - outputBufferCount < substitute.Length)
{
return(false);
}
substitute.CopyTo(0, outputBuffer, outputBufferCount, substitute.Length);
outputBufferCount += substitute.Length;
}
else
{
InternalDebug.Assert(outputEnd - outputBufferCount > 0);
outputBuffer[outputBufferCount++] = ch;
}
}
return(true);
}
/// <summary>
/// Encodes the character.
/// </summary>
/// <param name="ch">The character to encode.</param>
/// <param name="outputBuffer">The output buffer.</param>
/// <param name="outputBufferCount">The output buffer count.</param>
/// <param name="outputEnd">The output end.</param>
/// <returns>
/// <c>true</c> if encoding is successful; otherwise, <c>false</c>.
/// </returns>
bool IFallback.FallBackChar(char ch, char[] outputBuffer, ref int outputBufferCount, int outputEnd)
{
if (htmlEscape)
{
HtmlEntityIndex htmlEntityIndex = (HtmlEntityIndex)0;
if (ch <= '>')
{
if (ch == '>')
{
htmlEntityIndex = HtmlEntityIndex.gt;
}
else if (ch == '<')
{
htmlEntityIndex = HtmlEntityIndex.lt;
}
else if (ch == '&')
{
htmlEntityIndex = HtmlEntityIndex.amp;
}
else if (ch == '"')
{
htmlEntityIndex = HtmlEntityIndex.quot;
}
}
else if ('\u00a0' <= ch && ch <= 'ÿ')
{
htmlEntityIndex = HtmlSupport.EntityMap[(int)(ch - '\u00a0')];
}
if (htmlEntityIndex != (HtmlEntityIndex)0)
{
string name = HtmlNameData.entities[(int)htmlEntityIndex].name;
if (outputEnd - outputBufferCount < name.Length + 2)
{
return(false);
}
outputBuffer[outputBufferCount++] = '&';
name.CopyTo(0, outputBuffer, outputBufferCount, name.Length);
outputBufferCount += name.Length;
outputBuffer[outputBufferCount++] = ';';
}
else
{
uint num = (uint)ch;
int num2 = (num < 16u) ? 1 : ((num < 256u) ? 2 : ((num < 4096u) ? 3 : 4));
if (outputEnd - outputBufferCount < num2 + 4)
{
return(false);
}
outputBuffer[outputBufferCount++] = '&';
outputBuffer[outputBufferCount++] = '#';
outputBuffer[outputBufferCount++] = 'x';
int num3 = outputBufferCount + num2;
while (num != 0u)
{
uint num4 = num & 15u;
outputBuffer[--num3] = (char)((ulong)num4 + (ulong)((num4 < 10u) ? 48L : 55L));
num >>= 4;
}
outputBufferCount += num2;
outputBuffer[outputBufferCount++] = ';';
}
}
else
{
string characterFallback = AsciiEncoderFallback.GetCharacterFallback(ch);
if (characterFallback != null)
{
if (outputEnd - outputBufferCount < characterFallback.Length)
{
return(false);
}
characterFallback.CopyTo(0, outputBuffer, outputBufferCount, characterFallback.Length);
outputBufferCount += characterFallback.Length;
}
else
{
outputBuffer[outputBufferCount++] = ch;
}
}
return(true);
}