datum_as_hexwkb datum_as_wkb OUT_DEFAULT_DECIMAL_DIGITS OUT_DOUBLE_BUFFER_SIZE OUT_MAX_BYTES_DOUBLE OUT_MAX_DIGITS OUT_MAX_DOUBLE OUT_MIN_DOUBLE

OUT_DOUBLE_BUFFER_SIZE #define OUT_DOUBLE_BUFFER_SIZE   OUT_MAX_BYTES_DOUBLE + 1 /* +1 including NULL */