tommath_private.h

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Author : Daniel Mendler
Date : 2019-04-04 11:01:08
Hash : db9a47d5
Message : allocation functions: pass size to XREALLOC and XFREE This is similar to the signatures of the custom allocation functions provided by GMP. The allocation sizes are useful if the allocator has no easy way to access the allocation size.
tommath_private.h
/* LibTomMath, multiple-precision integer library -- Tom St Denis
 *
 * LibTomMath is a library that provides multiple-precision
 * integer arithmetic as well as number theoretic functionality.
 *
 * The library was designed directly after the MPI library by
 * Michael Fromberger but has been written from scratch with
 * additional optimizations in place.
 *
 * SPDX-License-Identifier: Unlicense
 */
#ifndef TOMMATH_PRIV_H_
#define TOMMATH_PRIV_H_

#include "tommath.h"

#ifndef MIN
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
#endif

#ifndef MAX
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* define heap macros */
#ifndef XMALLOC
/* default to libc stuff */
#   define XMALLOC(size)                   malloc(size)
#   define XFREE(mem, size)                free(mem)
#   define XREALLOC(mem, oldsize, newsize) realloc(mem, newsize)
#else
/* prototypes for our heap functions */
extern void *XMALLOC(size_t size);
extern void *XREALLOC(void *mem, size_t oldsize, size_t newsize);
extern void XFREE(void *mem, size_t size);
#endif

/* ---> Basic Manipulations <--- */
#define IS_ZERO(a) ((a)->used == 0)
#define IS_EVEN(a) (((a)->used == 0) || (((a)->dp[0] & 1u) == 0u))
#define IS_ODD(a)  (((a)->used > 0) && (((a)->dp[0] & 1u) == 1u))

/* lowlevel functions, do not call! */
int s_mp_add(const mp_int *a, const mp_int *b, mp_int *c);
int s_mp_sub(const mp_int *a, const mp_int *b, mp_int *c);
#define s_mp_mul(a, b, c) s_mp_mul_digs(a, b, c, (a)->used + (b)->used + 1)
int fast_s_mp_mul_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
int s_mp_mul_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
int fast_s_mp_mul_high_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
int s_mp_mul_high_digs(const mp_int *a, const mp_int *b, mp_int *c, int digs);
int fast_s_mp_sqr(const mp_int *a, mp_int *b);
int s_mp_sqr(const mp_int *a, mp_int *b);
int mp_karatsuba_mul(const mp_int *a, const mp_int *b, mp_int *c);
int mp_toom_mul(const mp_int *a, const mp_int *b, mp_int *c);
int mp_karatsuba_sqr(const mp_int *a, mp_int *b);
int mp_toom_sqr(const mp_int *a, mp_int *b);
int fast_mp_invmod(const mp_int *a, const mp_int *b, mp_int *c);
int mp_invmod_slow(const mp_int *a, const mp_int *b, mp_int *c);
int fast_mp_montgomery_reduce(mp_int *x, const mp_int *n, mp_digit rho);
int mp_exptmod_fast(const mp_int *G, const mp_int *X, const mp_int *P, mp_int *Y, int redmode);
int s_mp_exptmod(const mp_int *G, const mp_int *X, const mp_int *P, mp_int *Y, int redmode);
void bn_reverse(unsigned char *s, int len);

extern const char *const mp_s_rmap;
extern const uint8_t mp_s_rmap_reverse[];
extern const size_t mp_s_rmap_reverse_sz;

/* Fancy macro to set an MPI from another type.
 * There are several things assumed:
 *  x is the counter
 *  a is the pointer to the MPI
 *  b is the original value that should be set in the MPI.
 */
#define MP_SET_XLONG(func_name, type)                    \
int func_name (mp_int * a, type b)                       \
{                                                        \
   int x = 0;                                            \
   int new_size = (((CHAR_BIT * sizeof(type)) + DIGIT_BIT) - 1) / DIGIT_BIT; \
   int res = mp_grow(a, new_size);                       \
   if (res == MP_OKAY) {                                 \
     mp_zero(a);                                         \
     while (b != 0u) {                                   \
        a->dp[x++] = ((mp_digit)b & MP_MASK);            \
        if ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT) { break; } \
        b >>= ((CHAR_BIT * sizeof (b)) <= DIGIT_BIT ? 0 : DIGIT_BIT); \
     }                                                   \
     a->used = x;                                        \
   }                                                     \
   return res;                                           \
}

#ifdef __cplusplus
}
#endif

#endif


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/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */
kc3-lang/libtommath/tommath_private.h

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