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88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/* -*- mode: c; c-basic-offset: 8 -*- */
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/*
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num_pred.c -- Predicates on numbers.
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*/
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/*
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Copyright (c) 1984, Taiichi Yuasa and Masami Hagiya.
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Copyright (c) 1990, Giuseppe Attardi.
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Copyright (c) 2001, Juan Jose Garcia Ripoll.
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ECL is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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See file '../Copyright' for full details.
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*/
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#define ECL_INCLUDE_MATH_H
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#include <ecl/ecl.h>
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#include <ecl/internal.h>
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#include <ecl/impl/math_dispatch.h>
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int
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ecl_oddp(cl_object x)
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{
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if (ECL_FIXNUMP(x))
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return ecl_fixnum(x) & 1;
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unlikely_if (!ECL_BIGNUMP(x))
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FEwrong_type_only_arg(@[oddp], x, @[integer]);
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return _ecl_big_odd_p(x);
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}
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int
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ecl_evenp(cl_object x)
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{
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if (ECL_FIXNUMP(x))
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return ~ecl_fixnum(x) & 1;
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unlikely_if (!ECL_BIGNUMP(x))
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FEwrong_type_only_arg(@[evenp], x, @[integer]);
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return _ecl_big_even_p(x);
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}
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cl_object
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cl_oddp(cl_object x)
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{ /* INV: ecl_oddp() checks type */
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@(return (ecl_oddp(x) ? ECL_T : ECL_NIL))
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}
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cl_object
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cl_evenp(cl_object x)
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{ /* INV: ecl_evenp() checks_type */
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@(return (ecl_evenp(x) ? ECL_T : ECL_NIL))
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}
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cl_object
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si_float_nan_p(cl_object x)
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{
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@(return (ecl_float_nan_p(x)? ECL_T : ECL_NIL))
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}
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cl_object
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si_float_infinity_p(cl_object x)
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{
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@(return (ecl_float_infinity_p(x)? ECL_T : ECL_NIL))
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}
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bool
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ecl_float_nan_p(cl_object x)
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{
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return !ecl_number_equalp(x,x);
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}
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bool
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ecl_float_infinity_p(cl_object x)
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{
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switch (ecl_t_of(x)) {
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case t_singlefloat:
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return !isfinite(ecl_single_float(x));
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case t_doublefloat:
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return !isfinite(ecl_double_float(x));
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#ifdef ECL_LONG_FLOAT
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case t_longfloat:
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return !isfinite(ecl_long_float(x));
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#endif
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default:
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return 0;
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}
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}
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