/*
 * File:   dclxvi-20130329/twistpoint_fp2.h
 * Author: Ruben Niederhagen, Peter Schwabe
 * Public Domain
 */

#ifndef TWISTPOINT_FP2_H
#define TWISTPOINT_FP2_H

#include "fp2e.h"
#include "scalar.h"

typedef struct twistpoint_fp2_struct twistpoint_fp2_struct_t;

struct twistpoint_fp2_struct
{	
	fp2e_t m_x; // X-Coordinate (Jacobian Coordinate system)
	fp2e_t m_y; // Y-Coordinate (Jacobian Coordinate system)
	fp2e_t m_z; // Z-Coordinate (Jacobian Coordinate system)
	fp2e_t m_t; // T = Z^2, only used during pairing computation, set to zero if not set
};

typedef twistpoint_fp2_struct_t twistpoint_fp2_t[1];

void twistpoint_fp2_set(twistpoint_fp2_t rop, const twistpoint_fp2_t op);

void twistpoint_fp2_setneutral(twistpoint_fp2_t rop);

void twistpoint_fp2_neg(twistpoint_fp2_t rop, const twistpoint_fp2_t op);

void twistpoint_fp2_set_fp2e(twistpoint_fp2_t rop, const fp2e_t x, const fp2e_t y, const fp2e_t z);

void twistpoint_fp2_affineset_fp2e(twistpoint_fp2_t rop, const fp2e_t x, const fp2e_t y);

void twistpoint_fp2_add_vartime(twistpoint_fp2_t rop, const twistpoint_fp2_t op1, const twistpoint_fp2_t op2);

void twistpoint_fp2_double(twistpoint_fp2_t rop, const twistpoint_fp2_t op);

void twistpoint_fp2_scalarmult_vartime(twistpoint_fp2_t rop, const twistpoint_fp2_t op, const scalar_t scalar);

void twistpoint_fp2_print(FILE *outfile, const twistpoint_fp2_t op);

// Transform to Affine Coordinates (z=1)
void twistpoint_fp2_makeaffine(twistpoint_fp2_t op);

#endif // ifdef TWISTPOINT_FP2_H