Viewing file:  isl_imath.c (1.71 KB) -rw-r--r--
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#include <isl_int.h>
uint32_t isl_imath_hash(mp_int v, uint32_t hash)
{
unsigned const char *data = (unsigned char *)v->digits;
unsigned const char *end = data + v->used * sizeof(v->digits[0]);
if (v->sign == 1)
isl_hash_byte(hash, 0xFF);
for (; data < end; ++data)
isl_hash_byte(hash, *data);
return hash;
}
/* Try a standard conversion that fits into a long.
*/
int isl_imath_fits_slong_p(mp_int op)
{
long out;
mp_result res = mp_int_to_int(op, &out);
return res == MP_OK;
}
/* Try a standard conversion that fits into an unsigned long.
*/
int isl_imath_fits_ulong_p(mp_int op)
{
unsigned long out;
mp_result res = mp_int_to_uint(op, &out);
return res == MP_OK;
}
void isl_imath_addmul_ui(mp_int rop, mp_int op1, unsigned long op2)
{
mpz_t temp;
mp_int_init(&temp);
mp_int_set_uvalue(&temp, op2);
mp_int_mul(op1, &temp, &temp);
mp_int_add(rop, &temp, rop);
mp_int_clear(&temp);
}
void isl_imath_submul_ui(mp_int rop, mp_int op1, unsigned long op2)
{
mpz_t temp;
mp_int_init(&temp);
mp_int_set_uvalue(&temp, op2);
mp_int_mul(op1, &temp, &temp);
mp_int_sub(rop, &temp, rop);
mp_int_clear(&temp);
}
/* Compute the division of lhs by a rhs of type unsigned long, rounding towards
* positive infinity (Ceil).
*/
void isl_imath_cdiv_q_ui(mp_int rop, mp_int lhs, unsigned long rhs)
{
mpz_t temp;
mp_int_init(&temp);
mp_int_set_uvalue(&temp, rhs);
impz_cdiv_q(rop, lhs, &temp);
mp_int_clear(&temp);
}
/* Compute the division of lhs by a rhs of type unsigned long, rounding towards
* negative infinity (Floor).
*/
void isl_imath_fdiv_q_ui(mp_int rop, mp_int lhs, unsigned long rhs)
{
mpz_t temp;
mp_int_init(&temp);
mp_int_set_uvalue(&temp, rhs);
impz_fdiv_q(rop, lhs, &temp);
mp_int_clear(&temp);
}
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