protected object?GetValue(string s, int n, ref int i)
{
if (i < n)
{
var c = s[i - 1];
if (c == '"' || c == '\'')
{
return(GetString(s, n, ref i));
}
if (c == '{')
{
var d = new Document();
i = d.Fields(s, i, n);
return(d);
}
if (c == '[')
{
var d = new DocArray();
i = d.Items(s, i, n);
return(d);
}
if (i + 4 < n && s.Substring(i, 4) == "true")
{
i += 4;
return(true);
}
if (i + 5 < n && s.Substring(i, 5) == "false")
{
i += 5;
return(false);
}
if (i + 4 < n && s.Substring(i, 4) == "null")
{
i += 4;
return(null);
}
var sg = c == '-';
if (sg && i < n)
{
c = s[i++];
}
var whole = Shareable.Integer.Zero;
var Ten = new Shareable.Integer(10);
if (Char.IsDigit(c))
{
i--;
whole = new Shareable.Integer(GetHex(s, n, ref i));
while (i < n && Char.IsDigit(s[i]))
{
whole = whole * Ten + new Shareable.Integer(GetHex(s, n, ref i));
}
}
else
{
goto bad;
}
if (i >= n || (s[i] != '.' && s[i] != 'e' && s[i] != 'E'))
{
if (whole.CompareTo(Shareable.Integer.intMax) < 0)
{
return(sg ? (int)-whole : (int)whole);
}
if (whole.CompareTo(Shareable.Integer.longMax) < 0)
{
return(sg ? (long)-whole : (long)whole);
}
return(sg ? -whole : whole);
}
int scale = 0;
if (s[i] == '.')
{
if (++i >= n || !Char.IsDigit(s[i]))
{
throw new DocumentException("decimal part expected");
}
while (i < n && Char.IsDigit(s[i]))
{
whole = whole * Ten + new Shareable.Integer(GetHex(s, n, ref i));
scale++;
}
}
if (i >= n || (s[i] != 'e' && s[i] != 'E'))
{
var m = (decimal)whole;
while (scale-- > 0)
{
m /= 10M;
}
return(sg ? -m : m);
}
if (++i >= n)
{
throw new DocumentException("exponent part expected");
}
var esg = s[i] == '-';
if ((s[i] == '-' || s[i] == '+') && (++i >= n || !Char.IsDigit(s[i])))
{
throw new DocumentException("exponent part expected");
}
var exp = 0;
while (i < n && Char.IsDigit(s[i]))
{
exp = exp * 10 + GetHex(s, n, ref i);
}
if (esg)
{
exp = -exp;
}
var dr = (double)whole * Math.Pow(10.0, exp - scale);
return(sg ? -dr : dr);
}
bad:
throw new DocumentException("Value expected at " + (i - 1));
}
internal static object?GetValue(byte t, byte[] b, ref int i)
{
object?tv = null;
switch (t)
{
case 1:
{
tv = BitConverter.ToDouble(b, i);
i += 8;
break;
}
case 2:
{
var n = GetLength(b, i);
i += 4;
tv = Encoding.UTF8.GetString(b, i, n - 1);
i += n;
break;
}
case 3:
{
tv = new Document(b, i);
i += GetLength(b, i);
break;
}
case 4:
{
tv = new DocArray(b, i);
i += GetLength(b, i);
break;
}
case 5:
{
var n = GetLength(b, i);
var r = new byte[n];
for (int j = 0; j < n; j++)
{
r[j] = b[i + j + 4];
}
tv = r;
i += n;
break;
}
case 7:
{
var r = new byte[12];
for (int j = 0; j < 12; j++)
{
r[j] = b[i + j];
}
tv = new ObjectId(r);
i += 12;
break;
}
case 8:
{
tv = b[i] != 0;
i++;
break;
}
case 9:
{
tv = BitConverter.ToInt64(b, i);
i += 8;
break;
}
case 16:
{
tv = (long)BitConverter.ToInt32(b, i);
i += 4;
break;
}
case 18:
{
tv = BitConverter.ToInt64(b, i);
i += 8;
break;
}
case 19: // decimal type added for Pyrrho
{
var n = GetLength(b, i);
i += 4;
tv = decimal.Parse(Encoding.UTF8.GetString(b, i, n - 1));
i += n;
break;
}
}
return(tv);
}
