diff options
Diffstat (limited to 'gmp-6.3.0/demos/expr/exprf.c')
| -rw-r--r-- | gmp-6.3.0/demos/expr/exprf.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/gmp-6.3.0/demos/expr/exprf.c b/gmp-6.3.0/demos/expr/exprf.c new file mode 100644 index 0000000..1f7e21f --- /dev/null +++ b/gmp-6.3.0/demos/expr/exprf.c @@ -0,0 +1,123 @@ +/* mpf expression evaluation + +Copyright 2000-2002 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 <stdio.h> +#include <string.h> +#include "gmp.h" +#include "expr-impl.h" + + +/* Change this to "#define TRACE(x) x" to get some traces. */ +#define TRACE(x) + + +static int +e_mpf_sgn (mpf_srcptr x) +{ + return mpf_sgn (x); +} + + +static const struct mpexpr_operator_t _mpf_expr_standard_table[] = { + + { "**", (mpexpr_fun_t) mpf_pow_ui, + MPEXPR_TYPE_BINARY_UI | MPEXPR_TYPE_RIGHTASSOC, 220 }, + + { "!", (mpexpr_fun_t) e_mpf_sgn, + MPEXPR_TYPE_LOGICAL_NOT | MPEXPR_TYPE_PREFIX, 210 }, + { "-", (mpexpr_fun_t) mpf_neg, + MPEXPR_TYPE_UNARY | MPEXPR_TYPE_PREFIX, 210 }, + + { "*", (mpexpr_fun_t) mpf_mul, MPEXPR_TYPE_BINARY, 200 }, + { "/", (mpexpr_fun_t) mpf_div, MPEXPR_TYPE_BINARY, 200 }, + + { "+", (mpexpr_fun_t) mpf_add, MPEXPR_TYPE_BINARY, 190 }, + { "-", (mpexpr_fun_t) mpf_sub, MPEXPR_TYPE_BINARY, 190 }, + + { "<<", (mpexpr_fun_t) mpf_mul_2exp, MPEXPR_TYPE_BINARY_UI, 180 }, + { ">>", (mpexpr_fun_t) mpf_div_2exp, MPEXPR_TYPE_BINARY_UI, 180 }, + + { "<=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_LE, 170 }, + { "<", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_LT, 170 }, + { ">=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_GE, 170 }, + { ">", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_GT, 170 }, + + { "==", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_EQ, 160 }, + { "!=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_NE, 160 }, + + { "&&", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_LOGICAL_AND, 120 }, + { "||", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_LOGICAL_OR, 110 }, + + { ":", NULL, MPEXPR_TYPE_COLON, 101 }, + { "?", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_QUESTION, 100 }, + + { ")", NULL, MPEXPR_TYPE_CLOSEPAREN, 4 }, + { "(", NULL, MPEXPR_TYPE_OPENPAREN, 3 }, + { ",", NULL, MPEXPR_TYPE_ARGSEP, 2 }, + { "$", NULL, MPEXPR_TYPE_VARIABLE, 1 }, + + { "abs", (mpexpr_fun_t) mpf_abs, MPEXPR_TYPE_UNARY }, + { "ceil", (mpexpr_fun_t) mpf_ceil, MPEXPR_TYPE_UNARY }, + { "cmp", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_I_BINARY }, + { "eq", (mpexpr_fun_t) mpf_eq, MPEXPR_TYPE_I_TERNARY_UI }, + { "floor", (mpexpr_fun_t) mpf_floor, MPEXPR_TYPE_UNARY }, + { "integer_p",(mpexpr_fun_t) mpf_integer_p, MPEXPR_TYPE_I_UNARY }, + { "max", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MAX | MPEXPR_TYPE_PAIRWISE }, + { "min", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MIN | MPEXPR_TYPE_PAIRWISE }, + { "reldiff", (mpexpr_fun_t) mpf_reldiff, MPEXPR_TYPE_BINARY }, + { "sgn", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_I_UNARY }, + { "sqrt", (mpexpr_fun_t) mpf_sqrt, MPEXPR_TYPE_UNARY }, + { "trunc", (mpexpr_fun_t) mpf_trunc, MPEXPR_TYPE_UNARY }, + + { NULL } +}; + +const struct mpexpr_operator_t * const mpf_expr_standard_table += _mpf_expr_standard_table; + + +int +mpf_expr (mpf_ptr res, int base, const char *e, ...) +{ + mpf_srcptr var[MPEXPR_VARIABLES]; + va_list ap; + int ret; + va_start (ap, e); + + TRACE (printf ("mpf_expr(): base %d, %s\n", base, e)); + ret = mpexpr_va_to_var ((void **) var, ap); + va_end (ap); + + if (ret != MPEXPR_RESULT_OK) + return ret; + + return mpf_expr_a (mpf_expr_standard_table, res, base, + mpf_get_prec (res), e, strlen(e), var); +} |