1 /* mpf expression evaluation 2 3 Copyright 2000, 2001, 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 the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <string.h> 22 #include "gmp.h" 23 #include "expr-impl.h" 24 25 26 /* Change this to "#define TRACE(x) x" to get some traces. */ 27 #define TRACE(x) 28 29 30 static int 31 e_mpf_sgn (mpf_srcptr x) 32 { 33 return mpf_sgn (x); 34 } 35 36 37 static const struct mpexpr_operator_t _mpf_expr_standard_table[] = { 38 39 { "**", (mpexpr_fun_t) mpf_pow_ui, 40 MPEXPR_TYPE_BINARY_UI | MPEXPR_TYPE_RIGHTASSOC, 220 }, 41 42 { "!", (mpexpr_fun_t) e_mpf_sgn, 43 MPEXPR_TYPE_LOGICAL_NOT | MPEXPR_TYPE_PREFIX, 210 }, 44 { "-", (mpexpr_fun_t) mpf_neg, 45 MPEXPR_TYPE_UNARY | MPEXPR_TYPE_PREFIX, 210 }, 46 47 { "*", (mpexpr_fun_t) mpf_mul, MPEXPR_TYPE_BINARY, 200 }, 48 { "/", (mpexpr_fun_t) mpf_div, MPEXPR_TYPE_BINARY, 200 }, 49 50 { "+", (mpexpr_fun_t) mpf_add, MPEXPR_TYPE_BINARY, 190 }, 51 { "-", (mpexpr_fun_t) mpf_sub, MPEXPR_TYPE_BINARY, 190 }, 52 53 { "<<", (mpexpr_fun_t) mpf_mul_2exp, MPEXPR_TYPE_BINARY_UI, 180 }, 54 { ">>", (mpexpr_fun_t) mpf_div_2exp, MPEXPR_TYPE_BINARY_UI, 180 }, 55 56 { "<=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_LE, 170 }, 57 { "<", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_LT, 170 }, 58 { ">=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_GE, 170 }, 59 { ">", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_GT, 170 }, 60 61 { "==", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_EQ, 160 }, 62 { "!=", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_CMP_NE, 160 }, 63 64 { "&&", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_LOGICAL_AND, 120 }, 65 { "||", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_LOGICAL_OR, 110 }, 66 67 { ":", NULL, MPEXPR_TYPE_COLON, 101 }, 68 { "?", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_QUESTION, 100 }, 69 70 { ")", NULL, MPEXPR_TYPE_CLOSEPAREN, 4 }, 71 { "(", NULL, MPEXPR_TYPE_OPENPAREN, 3 }, 72 { ",", NULL, MPEXPR_TYPE_ARGSEP, 2 }, 73 { "$", NULL, MPEXPR_TYPE_VARIABLE, 1 }, 74 75 { "abs", (mpexpr_fun_t) mpf_abs, MPEXPR_TYPE_UNARY }, 76 { "ceil", (mpexpr_fun_t) mpf_ceil, MPEXPR_TYPE_UNARY }, 77 { "cmp", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_I_BINARY }, 78 { "eq", (mpexpr_fun_t) mpf_eq, MPEXPR_TYPE_I_TERNARY_UI }, 79 { "floor", (mpexpr_fun_t) mpf_floor, MPEXPR_TYPE_UNARY }, 80 { "integer_p",(mpexpr_fun_t) mpf_integer_p, MPEXPR_TYPE_I_UNARY }, 81 { "max", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MAX | MPEXPR_TYPE_PAIRWISE }, 82 { "min", (mpexpr_fun_t) mpf_cmp, MPEXPR_TYPE_MIN | MPEXPR_TYPE_PAIRWISE }, 83 { "reldiff", (mpexpr_fun_t) mpf_reldiff, MPEXPR_TYPE_BINARY }, 84 { "sgn", (mpexpr_fun_t) e_mpf_sgn, MPEXPR_TYPE_I_UNARY }, 85 { "sqrt", (mpexpr_fun_t) mpf_sqrt, MPEXPR_TYPE_UNARY }, 86 { "trunc", (mpexpr_fun_t) mpf_trunc, MPEXPR_TYPE_UNARY }, 87 88 { NULL } 89 }; 90 91 const struct mpexpr_operator_t * const mpf_expr_standard_table 92 = _mpf_expr_standard_table; 93 94 95 int 96 #if HAVE_STDARG 97 mpf_expr (mpf_ptr res, int base, const char *e, ...) 98 #else 99 mpf_expr (va_alist) 100 va_dcl 101 #endif 102 { 103 mpf_srcptr var[MPEXPR_VARIABLES]; 104 va_list ap; 105 int ret; 106 #if HAVE_STDARG 107 va_start (ap, e); 108 #else 109 mpf_ptr res; 110 int base; 111 const char *e; 112 va_start (ap); 113 res = va_arg (ap, mpf_ptr); 114 base = va_arg (ap, int); 115 e = va_arg (ap, const char *); 116 #endif 117 118 TRACE (printf ("mpf_expr(): base %d, %s\n", base, e)); 119 ret = mpexpr_va_to_var ((void **) var, ap); 120 va_end (ap); 121 122 if (ret != MPEXPR_RESULT_OK) 123 return ret; 124 125 return mpf_expr_a (mpf_expr_standard_table, res, base, 126 mpf_get_prec (res), e, strlen(e), var); 127 } 128