private int CalculateSize(BsonToken t)
{
switch (t.Type)
{
case BsonType.Object:
{
BsonObject value = (BsonObject)t;
int bases = 4;
foreach (BsonProperty p in value)
{
int size = 1;
size += CalculateSize(p.Name);
size += CalculateSize(p.Value);
bases += size;
}
bases += 1;
value.CalculatedSize = bases;
return(bases);
}
case BsonType.Array:
{
BsonArray value = (BsonArray)t;
int size = 4;
ulong index = 0;
foreach (BsonToken c in value)
{
size += 1;
size += CalculateSize(MathUtils.IntLength(index));
size += CalculateSize(c);
index++;
}
size += 1;
value.CalculatedSize = size;
return(value.CalculatedSize);
}
case BsonType.Integer:
return(4);
case BsonType.Long:
return(8);
case BsonType.Number:
return(8);
case BsonType.String:
{
BsonString value = (BsonString)t;
string s = (string)value.Value;
value.ByteCount = (s != null) ? Encoding.GetByteCount(s) : 0;
value.CalculatedSize = CalculateSizeWithLength(value.ByteCount, value.IncludeLength);
return(value.CalculatedSize);
}
case BsonType.Boolean:
return(1);
case BsonType.Null:
case BsonType.Undefined:
return(0);
case BsonType.Date:
return(8);
case BsonType.Binary:
{
BsonBinary value = (BsonBinary)t;
byte[] data = (byte[])value.Value;
value.CalculatedSize = 4 + 1 + data.Length;
return(value.CalculatedSize);
}
case BsonType.Oid:
return(12);
case BsonType.Regex:
{
BsonRegex value = (BsonRegex)t;
int size = 0;
size += CalculateSize(value.Pattern);
size += CalculateSize(value.Options);
value.CalculatedSize = size;
return(value.CalculatedSize);
}
default:
throw new ArgumentOutOfRangeException(nameof(t), "Unexpected token when writing BSON: {0}".FormatWith(CultureInfo.InvariantCulture, t.Type));
}
}
