private void WriteEscapedString(string value)
{
// Escape the string if needed
string escapedString;
if (!value.Any(character => JsonTextWriter.CharacterNeedsEscaping(character)))
{
// No escaping needed;
escapedString = value;
}
else
{
StringBuilder stringBuilder = new StringBuilder();
int readOffset = 0;
while (readOffset != value.Length)
{
if (!this.RequiresEscapeSequence(value[readOffset]))
{
// Just write the character as is
stringBuilder.Append(value[readOffset++]);
}
else
{
char characterToEscape = value[readOffset++];
char escapeSequence = default;
switch (characterToEscape)
{
case '\\':
escapeSequence = '\\';
break;
case '"':
escapeSequence = '"';
break;
case '/':
escapeSequence = '/';
break;
case '\b':
escapeSequence = 'b';
break;
case '\f':
escapeSequence = 'f';
break;
case '\n':
escapeSequence = 'n';
break;
case '\r':
escapeSequence = 'r';
break;
case '\t':
escapeSequence = 't';
break;
}
if (escapeSequence >= ' ')
{
// We got a special character
stringBuilder.Append('\\');
stringBuilder.Append(escapeSequence);
}
else
{
// We got a control character (U+0000 through U+001F).
stringBuilder.AppendFormat(
CultureInfo.InvariantCulture,
"\\u{0:X4}",
(int)characterToEscape);
}
}
}
escapedString = stringBuilder.ToString();
}
// Convert to UTF8
byte[] utf8String = Encoding.UTF8.GetBytes(escapedString);
this.jsonTextMemoryWriter.Write(utf8String);
}
