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/* Demo program to run 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/. */
/* Usage: ./run-expr [-z] [-q] [-f] [-p prec] [-b base] expression...
Evaluate each argument as a simple expression. By default this is in mpz
integers, but -q selects mpq or -f selects mpf. For mpf the float
precision can be set with -p. In all cases the input base can be set
with -b, or the default is "0" meaning decimal with "0x" allowed.
This is a pretty trivial program, it's just an easy way to experiment
with the evaluation functions. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "expr.h"
void
run_expr (int type, int base, unsigned long prec, char *str)
{
int outbase = (base == 0 ? 10 : base);
int ret;
switch (type) {
case 'z':
default:
{
mpz_t res, var_a, var_b;
mpz_init (res);
mpz_init_set_ui (var_a, 55L);
mpz_init_set_ui (var_b, 99L);
ret = mpz_expr (res, base, str, var_a, var_b, NULL);
printf ("\"%s\" base %d: ", str, base);
if (ret == MPEXPR_RESULT_OK)
{
printf ("result ");
mpz_out_str (stdout, outbase, res);
printf ("\n");
}
else
printf ("invalid (return code %d)\n", ret);
mpz_clear (res);
mpz_clear (var_a);
mpz_clear (var_b);
}
break;
case 'q':
{
mpq_t res, var_a, var_b;
mpq_init (res);
mpq_init (var_a);
mpq_init (var_b);
mpq_set_ui (var_a, 55L, 1);
mpq_set_ui (var_b, 99L, 1);
ret = mpq_expr (res, base, str, var_a, var_b, NULL);
printf ("\"%s\" base %d: ", str, base);
if (ret == MPEXPR_RESULT_OK)
{
printf ("result ");
mpq_out_str (stdout, outbase, res);
printf ("\n");
}
else
printf ("invalid (return code %d)\n", ret);
mpq_clear (res);
mpq_clear (var_a);
mpq_clear (var_b);
}
break;
case 'f':
{
mpf_t res, var_a, var_b;
mpf_init2 (res, prec);
mpf_init_set_ui (var_a, 55L);
mpf_init_set_ui (var_b, 99L);
ret = mpf_expr (res, base, str, var_a, var_b, NULL);
printf ("\"%s\" base %d: ", str, base);
if (ret == MPEXPR_RESULT_OK)
{
printf ("result ");
mpf_out_str (stdout, outbase, (size_t) 0, res);
printf ("\n");
}
else
printf ("invalid (return code %d)\n", ret);
mpf_clear (res);
mpf_clear (var_a);
mpf_clear (var_b);
}
break;
}
}
int
main (int argc, char *argv[])
{
int type = 'z';
int base = 0;
unsigned long prec = 64;
int seen_expr = 0;
int opt;
char *arg;
for (;;)
{
argv++;
arg = argv[0];
if (arg == NULL)
break;
if (arg[0] == '-')
{
for (;;)
{
arg++;
opt = arg[0];
switch (opt) {
case '\0':
goto end_opt;
case 'f':
case 'q':
case 'z':
type = opt;
break;
case 'b':
arg++;
if (arg[0] == '\0')
{
argv++;
arg = argv[0];
if (arg == NULL)
{
need_arg:
fprintf (stderr, "Need argument for -%c\n", opt);
exit (1);
}
}
base = atoi (arg);
goto end_opt;
case 'p':
arg++;
if (arg[0] == '\0')
{
argv++;
arg = argv[0];
if (arg == NULL)
goto need_arg;
}
prec = atoi (arg);
goto end_opt;
case '-':
arg++;
if (arg[0] != '\0')
{
/* no "--foo" options */
fprintf (stderr, "Unrecognised option --%s\n", arg);
exit (1);
}
/* stop option interpretation at "--" */
for (;;)
{
argv++;
arg = argv[0];
if (arg == NULL)
goto done;
run_expr (type, base, prec, arg);
seen_expr = 1;
}
default:
fprintf (stderr, "Unrecognised option -%c\n", opt);
exit (1);
}
}
end_opt:
;
}
else
{
run_expr (type, base, prec, arg);
seen_expr = 1;
}
}
done:
if (! seen_expr)
{
printf ("Usage: %s [-z] [-q] [-f] [-p prec] [-b base] expression...\n", argv[0]);
exit (1);
}
return 0;
}
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