Function BsonValueAsDoubleCore

pg_documentdb_core/src/query/bson_compare.c:1503–1550

* Core implementation of converting bson value to double * In quiet mode no error is thrown if conversion results in overflow or underflow */

 * In quiet mode no error is thrown if conversion results in overflow or underflow
 */
static double
BsonValueAsDoubleCore(const bson_value_t *value, bool quiet)
{
	switch (value->value_type)
	{
		case BSON_TYPE_BOOL:
		{
			return (double) value->value.v_bool;
		}

		case BSON_TYPE_DOUBLE:
		{
			return value->value.v_double;
		}

		case BSON_TYPE_INT32:
		{
			return (double) value->value.v_int32;
		}

		case BSON_TYPE_INT64:
		{
			return (double) value->value.v_int64;
		}

		case BSON_TYPE_DECIMAL128:
		{
			if (quiet)
			{
				return GetBsonDecimal128AsDoubleQuiet(value);
			}
			else
			{
				return GetBsonDecimal128AsDouble(value);
			}
		}

		case BSON_TYPE_DATE_TIME:
		{
			return (double) value->value.v_datetime;
		}

		default:
		{
			return 0;
		}
	}
}


/* Indicates whether the value can be represented as an int64 value without overflow or truncating decimal digits.