100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/* mpz expression evaluation
|
|
|
|
Copyright 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "gmp.h"
|
|
#include "expr-impl.h"
|
|
|
|
|
|
/* No need to parse '-' since that's handled as an operator.
|
|
This function also by mpq_expr_a, so it's not static. */
|
|
size_t
|
|
mpexpr_mpz_number (mpz_ptr res, __gmp_const char *e, size_t elen, int base)
|
|
{
|
|
char *edup;
|
|
size_t i, ret;
|
|
int base_effective = (base == 0 ? 10 : base);
|
|
void *(*allocate_func) (size_t);
|
|
void (*free_func) (void *, size_t);
|
|
|
|
i = 0;
|
|
if (e[i] == '0')
|
|
{
|
|
i++;
|
|
if (e[i] == 'x' || e[i] == 'b')
|
|
i++;
|
|
}
|
|
|
|
for ( ; i < elen; i++)
|
|
if (! isasciidigit_in_base (e[i], base_effective))
|
|
break;
|
|
|
|
mp_get_memory_functions (&allocate_func, NULL, &free_func);
|
|
edup = (*allocate_func) (i+1);
|
|
memcpy (edup, e, i);
|
|
edup[i] = '\0';
|
|
|
|
if (mpz_set_str (res, edup, base) == 0)
|
|
ret = i;
|
|
else
|
|
ret = 0;
|
|
|
|
(*free_func) (edup, i+1);
|
|
return ret;
|
|
}
|
|
|
|
/* ignoring prec */
|
|
static void
|
|
e_mpz_init (mpz_ptr z, unsigned long prec)
|
|
{
|
|
mpz_init (z);
|
|
}
|
|
|
|
int
|
|
mpz_expr_a (__gmp_const struct mpexpr_operator_t *table,
|
|
mpz_ptr res, int base,
|
|
__gmp_const char *e, size_t elen,
|
|
mpz_srcptr var[26])
|
|
{
|
|
struct mpexpr_parse_t p;
|
|
|
|
p.table = table;
|
|
p.res = (mpX_ptr) res;
|
|
p.base = base;
|
|
p.e = e;
|
|
p.elen = elen;
|
|
p.var = (mpX_srcptr *) var;
|
|
|
|
p.mpX_clear = (mpexpr_fun_one_t) mpz_clear;
|
|
p.mpX_ulong_p = (mpexpr_fun_i_unary_t) mpz_fits_ulong_p;
|
|
p.mpX_get_ui = (mpexpr_fun_get_ui_t) mpz_get_ui;
|
|
p.mpX_init = (mpexpr_fun_unary_ui_t) e_mpz_init;
|
|
p.mpX_number = (mpexpr_fun_number_t) mpexpr_mpz_number;
|
|
p.mpX_set = (mpexpr_fun_unary_t) mpz_set;
|
|
p.mpX_set_or_swap = (mpexpr_fun_unary_t) mpz_swap;
|
|
p.mpX_set_si = (mpexpr_fun_set_si_t) mpz_set_si;
|
|
p.mpX_swap = (mpexpr_fun_swap_t) mpz_swap;
|
|
|
|
return mpexpr_evaluate (&p);
|
|
}
|