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files >> //opt/alt/ruby32/include/ruby/internal/core/rbignum.h
#ifndef RBIMPL_RBIGNUM_H /*-*-C++-*-vi:se ft=cpp:*/ #define RBIMPL_RBIGNUM_H /** * @file * @author Ruby developers <ruby-core@ruby-lang.org> * @copyright This file is a part of the programming language Ruby. * Permission is hereby granted, to either redistribute and/or * modify this file, provided that the conditions mentioned in the * file COPYING are met. Consult the file for details. * @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are * implementation details. Don't take them as canon. They could * rapidly appear then vanish. The name (path) of this header file * is also an implementation detail. Do not expect it to persist * at the place it is now. Developers are free to move it anywhere * anytime at will. * @note To ruby-core: remember that this header can be possibly * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of * extension libraries. They could be written in C++98. * @brief Routines to manipulate struct RBignum. * @note The struct RBignum itself is opaque. */ #include "ruby/internal/dllexport.h" #include "ruby/internal/value.h" #include "ruby/internal/value_type.h" #include "ruby/internal/stdbool.h" #define RBIGNUM_SIGN rb_big_sign /**< @alias{rb_big_sign} */ /** @cond INTERNAL_MACRO */ #define RBIGNUM_POSITIVE_P RBIGNUM_POSITIVE_P #define RBIGNUM_NEGATIVE_P RBIGNUM_NEGATIVE_P /** @endcond */ RBIMPL_SYMBOL_EXPORT_BEGIN() /** * The "sign" of a bignum. * * @param[in] num An object of RBignum. * @retval 1 It is greater than or equal to zero. * @retval 0 It is less than zero. * * @internal * * Implementation wise, unlike fixnums (which are 2's complement), bignums are * signed magnitude system. Theoretically it could be possible to have * negative zero instances. But in reality there is no way to create such * thing. Nobody ever needed that kind of insanity. */ int rb_big_sign(VALUE num); RBIMPL_SYMBOL_EXPORT_END() /** * Checks if the bignum is positive. * @param[in] b An object of RBignum. * @retval false `b` is less than zero. * @retval true Otherwise. */ static inline bool RBIGNUM_POSITIVE_P(VALUE b) { RBIMPL_ASSERT_TYPE(b, RUBY_T_BIGNUM); return RBIGNUM_SIGN(b); } /** * Checks if the bignum is negative. * @param[in] b An object of RBignum. * @retval true `b` is less than zero. * @retval false Otherwise. */ static inline bool RBIGNUM_NEGATIVE_P(VALUE b) { RBIMPL_ASSERT_TYPE(b, RUBY_T_BIGNUM); return ! RBIGNUM_POSITIVE_P(b); } #endif /* RBIMPL_RBIGNUM_H */
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