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Annotation of OpenXM_contrib/gmp/demos/expr/exprza.c, Revision 1.1

1.1     ! ohara       1: /* mpz expression evaluation */
        !             2:
        !             3: /*
        !             4: Copyright 2000, 2001 Free Software Foundation, Inc.
        !             5:
        !             6: This file is part of the GNU MP Library.
        !             7:
        !             8: The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU Lesser General Public License as published by
        !            10: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            11: option) any later version.
        !            12:
        !            13: The GNU MP Library is distributed in the hope that it will be useful, but
        !            14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Lesser General Public License
        !            19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: MA 02111-1307, USA.
        !            22: */
        !            23:
        !            24: #include <ctype.h>
        !            25: #include <stdio.h>
        !            26: #include "gmp.h"
        !            27: #include "expr-impl.h"
        !            28:
        !            29:
        !            30: /* No need to parse '-' since that's handled as an operator.
        !            31:    This function also by mpq_expr_a, so it's not static.  */
        !            32: size_t
        !            33: mpexpr_mpz_number (mpz_ptr res, __gmp_const char *e, size_t elen, int base)
        !            34: {
        !            35:   char    *edup;
        !            36:   size_t  i, ret;
        !            37:   int     base_effective = (base == 0 ? 10 : base);
        !            38:
        !            39:   i = 0;
        !            40:   if (e[i] == '0')
        !            41:     {
        !            42:       i++;
        !            43:       if (e[i] == 'x' || e[i] == 'b')
        !            44:         i++;
        !            45:     }
        !            46:
        !            47:   for ( ; i < elen; i++)
        !            48:     if (! isasciidigit_in_base (e[i], base_effective))
        !            49:       break;
        !            50:
        !            51:   edup = (*__gmp_allocate_func) (i+1);
        !            52:   memcpy (edup, e, i);
        !            53:   edup[i] = '\0';
        !            54:
        !            55:   if (mpz_set_str (res, edup, base) == 0)
        !            56:     ret = i;
        !            57:   else
        !            58:     ret = 0;
        !            59:
        !            60:   (*__gmp_free_func) (edup, i+1);
        !            61:   return ret;
        !            62: }
        !            63:
        !            64:
        !            65: int
        !            66: mpz_expr_a (__gmp_const struct mpexpr_operator_t *table,
        !            67:             mpz_ptr res, int base,
        !            68:             __gmp_const char *e, size_t elen,
        !            69:             mpz_srcptr var[26])
        !            70: {
        !            71:   struct mpexpr_parse_t  p;
        !            72:
        !            73:   p.table = table;
        !            74:   p.res = (mpX_ptr) res;
        !            75:   p.base = base;
        !            76:   p.e = e;
        !            77:   p.elen = elen;
        !            78:   p.var = (mpX_srcptr *) var;
        !            79:
        !            80:   p.mpX_clear       = (mpexpr_fun_one_t)      mpz_clear;
        !            81:   p.mpX_ulong_p     = (mpexpr_fun_i_unary_t)  mpz_fits_ulong_p;
        !            82:   p.mpX_get_ui      = (mpexpr_fun_get_ui_t)   mpz_get_ui;
        !            83:   p.mpX_init        = (mpexpr_fun_unary_ui_t) mpz_init;
        !            84:   p.mpX_number      = (mpexpr_fun_number_t)   mpexpr_mpz_number;
        !            85:   p.mpX_set         = (mpexpr_fun_unary_t)    mpz_set;
        !            86:   p.mpX_set_or_swap = (mpexpr_fun_unary_t)    mpz_swap;
        !            87:   p.mpX_set_si      = (mpexpr_fun_set_si_t)   mpz_set_si;
        !            88:   p.mpX_swap        = (mpexpr_fun_swap_t)     mpz_swap;
        !            89:
        !            90:   return mpexpr_evaluate (&p);
        !            91: }