#include "zqfield.h"
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ZqField::ZqField(PBigInt ap) {
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mpz_init_set(p, *ap);
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mpz_init_set_ui(zero, 0);
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mpz_init_set_ui(one, 1);
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nBits = mpz_sizeinbase (p, 2);
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mpz_init(mask);
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mpz_mul_2exp(mask, one, nBits-1);
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mpz_sub(mask, mask, one);
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}
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ZqField::~ZqField() {
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mpz_clear(p);
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mpz_clear(zero);
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mpz_clear(one);
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}
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void ZqField::add(PBigInt r, PBigInt a, PBigInt b) {
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mpz_add(*r,*a,*b);
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if (mpz_cmp(*r, p) >= 0) {
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mpz_sub(*r, *r, p);
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}
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}
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void ZqField::sub(PBigInt r, PBigInt a, PBigInt b) {
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if (mpz_cmp(*a, *b) >= 0) {
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mpz_sub(*r, *a, *b);
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} else {
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mpz_sub(*r, *b, *a);
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mpz_sub(*r, p, *r);
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}
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}
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void ZqField::neg(PBigInt r, PBigInt a) {
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if (mpz_sgn(*a) > 0) {
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mpz_sub(*r, p, *a);
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} else {
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mpz_set(*r, *a);
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}
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}
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void ZqField::mul(PBigInt r, PBigInt a, PBigInt b) {
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mpz_t tmp;
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mpz_init(tmp);
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mpz_mul(tmp,*a,*b);
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mpz_fdiv_r(*r, tmp, p);
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mpz_clear(tmp);
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}
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void ZqField::div(PBigInt r, PBigInt a, PBigInt b) {
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mpz_t tmp;
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mpz_init(tmp);
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mpz_invert(tmp, *b, p);
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mpz_mul(tmp,*a,tmp);
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mpz_fdiv_r(*r, tmp, p);
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mpz_clear(tmp);
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}
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void ZqField::idiv(PBigInt r, PBigInt a, PBigInt b) {
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mpz_fdiv_q(*r, *a, *b);
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}
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void ZqField::mod(PBigInt r, PBigInt a, PBigInt b) {
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mpz_fdiv_r(*r, *a, *b);
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}
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void ZqField::pow(PBigInt r, PBigInt a, PBigInt b) {
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mpz_powm(*r, *a, *b, p);
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}
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void ZqField::lt(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c<0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::eq(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c==0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::gt(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c>0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::leq(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c<=0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::geq(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c>=0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::neq(PBigInt r, PBigInt a, PBigInt b) {
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int c = mpz_cmp(*a, *b);
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if (c!=0) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::land(PBigInt r, PBigInt a, PBigInt b) {
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if (mpz_sgn(*a) && mpz_sgn(*b)) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::lor(PBigInt r, PBigInt a, PBigInt b) {
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if (mpz_sgn(*a) || mpz_sgn(*b)) {
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mpz_set(*r, one);
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} else {
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mpz_set(*r, zero);
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}
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}
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void ZqField::lnot(PBigInt r, PBigInt a) {
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if (mpz_sgn(*a)) {
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mpz_set(*r, zero);
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} else {
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mpz_set(*r, one);
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}
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}
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int ZqField::isTrue(PBigInt a) {
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return mpz_sgn(*a);
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}
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void ZqField::copyn(PBigInt a, PBigInt b, int n) {
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for (int i=0;i<n; i++) mpz_set(a[i], b[i]);
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}
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void ZqField::band(PBigInt r, PBigInt a, PBigInt b) {
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mpz_and(*r, *a, *b);
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mpz_and(*r, *r, mask);
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}
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void ZqField::bor(PBigInt r, PBigInt a, PBigInt b) {
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mpz_ior(*r, *a, *b);
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mpz_and(*r, *r, mask);
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}
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void ZqField::bxor(PBigInt r, PBigInt a, PBigInt b) {
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mpz_xor(*r, *a, *b);
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mpz_and(*r, *r, mask);
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}
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void ZqField::bnot(PBigInt r, PBigInt a) {
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mpz_xor(*r, *a, mask);
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mpz_and(*r, *r, mask);
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}
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void ZqField::shl(PBigInt r, PBigInt a, PBigInt b) {
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if (mpz_cmp_ui(*b, nBits) >= 0) {
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mpz_set(*r, zero);
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} else {
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mpz_mul_2exp(*r, *a, mpz_get_ui(*b));
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mpz_and(*r, *r, mask);
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}
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}
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void ZqField::shr(PBigInt r, PBigInt a, PBigInt b) {
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if (mpz_cmp_ui(*b, nBits) >= 0) {
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mpz_set(*r, zero);
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} else {
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mpz_tdiv_q_2exp(*r, *a, mpz_get_ui(*b));
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mpz_and(*r, *r, mask);
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}
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}
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int ZqField::toInt(PBigInt a) {
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return mpz_get_si (*a);
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}
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