74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis
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*
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* LibTomMath is library that provides for multiple-precision
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* integer arithmetic as well as number theoretic functionality.
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*
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* This file "poly.h" provides GF(p^k) functionality on top of the
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* libtommath library.
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*
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* The library is designed directly after the MPI library by
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* Michael Fromberger but has been written from scratch with
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* additional optimizations in place.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@iahu.ca, http://libtommath.iahu.ca
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*/
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#ifndef POLY_H_
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#define POLY_H_
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#include "bn.h"
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/* a mp_poly is basically a derived "class" of a mp_int
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* it uses the same technique of growing arrays via
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* used/alloc parameters except the base unit or "digit"
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* is in fact a mp_int. These hold the coefficients
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* of the polynomial
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*/
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typedef struct {
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int used, /* coefficients used */
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alloc; /* coefficients allocated (and initialized) */
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mp_int *co, /* coefficients */
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cha; /* characteristic */
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} mp_poly;
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#define MP_POLY_PREC 16 /* default coefficients allocated */
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/* init a poly */
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int mp_poly_init(mp_poly *a, mp_int *cha);
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/* init a poly of a given (size) degree */
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int mp_poly_init_size(mp_poly *a, mp_int *cha, int size);
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/* copy, b = a */
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int mp_poly_copy(mp_poly *a, mp_poly *b);
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/* init from a copy, a = b */
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int mp_poly_init_copy(mp_poly *a, mp_poly *b);
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/* free a poly from ram */
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void mp_poly_clear(mp_poly *a);
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/* exchange two polys */
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void mp_poly_exch(mp_poly *a, mp_poly *b);
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/* ---> Basic Arithmetic <--- */
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/* add two polynomials, c(x) = a(x) + b(x) */
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int mp_poly_add(mp_poly *a, mp_poly *b, mp_poly *c);
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/* subtracts two polynomials, c(x) = a(x) - b(x) */
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int mp_poly_sub(mp_poly *a, mp_poly *b, mp_poly *c);
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/* multiplies two polynomials, c(x) = a(x) * b(x) */
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int mp_poly_mul(mp_poly *a, mp_poly *b, mp_poly *c);
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#endif
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