/* mpz expression evaluation

Copyright 2000-2002, 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 either:

  * the GNU Lesser General Public License as published by the Free

    Software Foundation; either version 3 of the License, or (at your

    option) any later version.

or

  * the GNU General Public License as published by the Free Software

    Foundation; either version 2 of the License, or (at your option) any

    later version.

or both in parallel, as here.

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 General Public License

for more details.

You should have received copies of the GNU General Public License and the

GNU Lesser General Public License along with the GNU MP Library.  If not,

see https://www.gnu.org/licenses/.  */

#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, 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 (const struct mpexpr_operator_t *table,

            mpz_ptr res, int base,

            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);

}