static AotConfig()
{
jsonSerializer = new Text.Json.JsonTypeSerializer();
jsvSerializer = new Text.Jsv.JsvTypeSerializer();
jsonReader = new JsReader <Text.Json.JsonTypeSerializer>();
jsonWriter = new JsWriter <Text.Json.JsonTypeSerializer>();
jsvReader = new JsReader <Text.Jsv.JsvTypeSerializer>();
jsvWriter = new JsWriter <Text.Jsv.JsvTypeSerializer>();
}
public static string Unescape(string input)
{
var length = input.Length;
int start = 0;
int count = 0;
StringBuilder output = new StringBuilder(length);
for ( ; count < length; )
{
if (input[count] == JsonUtils.QuoteChar)
{
if (start != count)
{
output.Append(input, start, count - start);
}
count++;
start = count;
continue;
}
if (input[count] == JsonUtils.EscapeChar)
{
if (start != count)
{
output.Append(input, start, count - start);
}
start = count;
count++;
if (count >= length) continue;
//we will always be parsing an escaped char here
var c = input[count];
switch (c)
{
case 'a':
output.Append('\a');
count++;
break;
case 'b':
output.Append('\b');
count++;
break;
case 'f':
output.Append('\f');
count++;
break;
case 'n':
output.Append('\n');
count++;
break;
case 'r':
output.Append('\r');
count++;
break;
case 'v':
output.Append('\v');
count++;
break;
case 't':
output.Append('\t');
count++;
break;
case 'u':
if (count + 4 < length)
{
var unicodeString = input.Substring(count+1, 4);
var unicodeIntVal = UInt32.Parse(unicodeString, NumberStyles.HexNumber);
output.Append(JsonTypeSerializer.ConvertFromUtf32((int) unicodeIntVal));
count += 5;
}
else
{
output.Append(c);
}
break;
case 'x':
if (count + 4 < length)
{
var unicodeString = input.Substring(count+1, 4);
var unicodeIntVal = UInt32.Parse(unicodeString, NumberStyles.HexNumber);
output.Append(JsonTypeSerializer.ConvertFromUtf32((int) unicodeIntVal));
count += 5;
}
else
if (count + 2 < length)
{
var unicodeString = input.Substring(count+1, 2);
var unicodeIntVal = UInt32.Parse(unicodeString, NumberStyles.HexNumber);
output.Append(JsonTypeSerializer.ConvertFromUtf32((int) unicodeIntVal));
count += 3;
}
else
{
output.Append(input, start, count - start);
}
break;
default:
output.Append(c);
count++;
break;
}
start = count;
}
else
{
count++;
}
}
output.Append(input, start, length - start);
return output.ToString();
}
