public static int Hash(string str)
{
return(StringHasher.HashSubstring(str, 0, str.Length));
}
public static Key DecodeToken(string text, Token token)
{
if (token.Type != TokenType.EncodedString)
{
return(new Key(text.Substring(token.Start, token.Length), token.Hash));
}
int cur = token.Start;
StringBuilder value = new StringBuilder(token.Length);
StringHasher hasher = StringHasher.Create();
for (int end = cur + token.Length; cur != -1 && cur < end;)
{
char ch = text[cur];
if (ch == '\\')
{
ch = (cur + 1 < end) ? text[cur + 1] : '\0';
switch (ch)
{
case '\"':
case '\\':
case '/':
hasher.AddChar(ch);
value.Append(ch);
cur += 2;
break;
case 'b':
hasher.AddChar('\b');
value.Append('\b');
cur += 2;
break;
case 'f':
hasher.AddChar('\f');
value.Append('\f');
cur += 2;
break;
case 'n':
hasher.AddChar('\n');
value.Append('\n');
cur += 2;
break;
case 'r':
hasher.AddChar('\r');
value.Append('\r');
cur += 2;
break;
case 't':
hasher.AddChar('\t');
value.Append('\t');
cur += 2;
break;
case 'u':
if (cur + 5 < end)
{
string buffer = text.Substring(cur + 2, 4);
if (uint.TryParse(buffer, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out uint decoded))
{
ch = (char)decoded;
hasher.AddChar(ch);
value.Append(ch);
cur += 6;
}
else
{
cur = -1;
}
}
else
{
cur = -1;
}
break;
default:
cur = -1;
break;
}
}
else
{
hasher.AddChar(ch);
value.Append(ch);
cur++;
}
}
if (cur == -1)
{
throw JsonException.New(Resources.Parser_InvalidStringToken);
}
return(new Key(value.ToString(), hasher.HashValue));
}
