#define VARS_NEEDED uint C_len = len/BLOCK_SIZE_LIGHT + (len%BLOCK_SIZE_LIGHT!=0);\
uint C_field_bits = bits(BLOCK_SIZE_LIGHT);\
uint O_len = uint_len(1,O_bits_len);\
#define VARS_NEEDED uint C_len = len/BLOCK_SIZE_LIGHT + (len%BLOCK_SIZE_LIGHT!=0);\
uint C_field_bits = bits(BLOCK_SIZE_LIGHT);\
uint O_len = uint_len(1,O_bits_len);\