github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/demos/expr/exprf.c (about)

     1  /* mpf expression evaluation
     2  
     3  Copyright 2000-2002 Free Software Foundation, Inc.
     4  
     5  This file is part of the GNU MP Library.
     6  
     7  The GNU MP Library is free software; you can redistribute it and/or modify
     8  it under the terms of either:
     9  
    10    * the GNU Lesser General Public License as published by the Free
    11      Software Foundation; either version 3 of the License, or (at your
    12      option) any later version.
    13  
    14  or
    15  
    16    * the GNU General Public License as published by the Free Software
    17      Foundation; either version 2 of the License, or (at your option) any
    18      later version.
    19  
    20  or both in parallel, as here.
    21  
    22  The GNU MP Library is distributed in the hope that it will be useful, but
    23  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    24  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    25  for more details.
    26  
    27  You should have received copies of the GNU General Public License and the
    28  GNU Lesser General Public License along with the GNU MP Library.  If not,
    29  see https://www.gnu.org/licenses/.  */
    30  
    31  #include <stdio.h>
    32  #include <string.h>
    33  #include "gmp.h"
    34  #include "expr-impl.h"
    35  
    36  
    37  /* Change this to "#define TRACE(x) x" to get some traces. */
    38  #define TRACE(x)
    39  
    40  
    41  static int
    42  e_mpf_sgn (mpf_srcptr x)
    43  {
    44    return mpf_sgn (x);
    45  }
    46  
    47  
    48  static const struct mpexpr_operator_t  _mpf_expr_standard_table[] = {
    49  
    50    { "**",  (mpexpr_fun_t) mpf_pow_ui,
    51      MPEXPR_TYPE_BINARY_UI | MPEXPR_TYPE_RIGHTASSOC,                   220 },
    52  
    53    { "!",   (mpexpr_fun_t) e_mpf_sgn,
    54      MPEXPR_TYPE_LOGICAL_NOT | MPEXPR_TYPE_PREFIX,                     210 },
    55    { "-",   (mpexpr_fun_t) mpf_neg,
    56      MPEXPR_TYPE_UNARY | MPEXPR_TYPE_PREFIX,                           210 },
    57  
    58    { "*",   (mpexpr_fun_t) mpf_mul,           MPEXPR_TYPE_BINARY,      200 },
    59    { "/",   (mpexpr_fun_t) mpf_div,           MPEXPR_TYPE_BINARY,      200 },
    60  
    61    { "+",   (mpexpr_fun_t) mpf_add,           MPEXPR_TYPE_BINARY,      190 },
    62    { "-",   (mpexpr_fun_t) mpf_sub,           MPEXPR_TYPE_BINARY,      190 },
    63  
    64    { "<<",  (mpexpr_fun_t) mpf_mul_2exp,      MPEXPR_TYPE_BINARY_UI,   180 },
    65    { ">>",  (mpexpr_fun_t) mpf_div_2exp,      MPEXPR_TYPE_BINARY_UI,   180 },
    66  
    67    { "<=",  (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_LE,      170 },
    68    { "<",   (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_LT,      170 },
    69    { ">=",  (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_GE,      170 },
    70    { ">",   (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_GT,      170 },
    71  
    72    { "==",  (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_EQ,      160 },
    73    { "!=",  (mpexpr_fun_t) mpf_cmp,           MPEXPR_TYPE_CMP_NE,      160 },
    74  
    75    { "&&",  (mpexpr_fun_t) e_mpf_sgn,         MPEXPR_TYPE_LOGICAL_AND, 120 },
    76    { "||",  (mpexpr_fun_t) e_mpf_sgn,         MPEXPR_TYPE_LOGICAL_OR,  110 },
    77  
    78    { ":",   NULL,                             MPEXPR_TYPE_COLON,       101 },
    79    { "?",   (mpexpr_fun_t) e_mpf_sgn,         MPEXPR_TYPE_QUESTION,    100 },
    80  
    81    { ")",   NULL,                             MPEXPR_TYPE_CLOSEPAREN,    4 },
    82    { "(",   NULL,                             MPEXPR_TYPE_OPENPAREN,     3 },
    83    { ",",   NULL,                             MPEXPR_TYPE_ARGSEP,        2 },
    84    { "$",   NULL,                             MPEXPR_TYPE_VARIABLE,      1 },
    85  
    86    { "abs",      (mpexpr_fun_t) mpf_abs,          MPEXPR_TYPE_UNARY        },
    87    { "ceil",     (mpexpr_fun_t) mpf_ceil,         MPEXPR_TYPE_UNARY        },
    88    { "cmp",      (mpexpr_fun_t) mpf_cmp,          MPEXPR_TYPE_I_BINARY     },
    89    { "eq",       (mpexpr_fun_t) mpf_eq,           MPEXPR_TYPE_I_TERNARY_UI },
    90    { "floor",    (mpexpr_fun_t) mpf_floor,        MPEXPR_TYPE_UNARY        },
    91    { "integer_p",(mpexpr_fun_t) mpf_integer_p,    MPEXPR_TYPE_I_UNARY      },
    92    { "max",   (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MAX | MPEXPR_TYPE_PAIRWISE },
    93    { "min",   (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MIN | MPEXPR_TYPE_PAIRWISE },
    94    { "reldiff",  (mpexpr_fun_t) mpf_reldiff,      MPEXPR_TYPE_BINARY       },
    95    { "sgn",      (mpexpr_fun_t) e_mpf_sgn,        MPEXPR_TYPE_I_UNARY      },
    96    { "sqrt",     (mpexpr_fun_t) mpf_sqrt,         MPEXPR_TYPE_UNARY        },
    97    { "trunc",    (mpexpr_fun_t) mpf_trunc,        MPEXPR_TYPE_UNARY        },
    98  
    99    { NULL }
   100  };
   101  
   102  const struct mpexpr_operator_t * const mpf_expr_standard_table
   103  = _mpf_expr_standard_table;
   104  
   105  
   106  int
   107  mpf_expr (mpf_ptr res, int base, const char *e, ...)
   108  {
   109    mpf_srcptr  var[MPEXPR_VARIABLES];
   110    va_list     ap;
   111    int         ret;
   112    va_start (ap, e);
   113  
   114    TRACE (printf ("mpf_expr(): base %d, %s\n", base, e));
   115    ret = mpexpr_va_to_var ((void **) var, ap);
   116    va_end (ap);
   117  
   118    if (ret != MPEXPR_RESULT_OK)
   119      return ret;
   120  
   121    return mpf_expr_a (mpf_expr_standard_table, res, base,
   122  		     mpf_get_prec (res), e, strlen(e), var);
   123  }