Current File : //proc/self/root/opt/alt/ruby32/include/ruby/internal/intern/compar.h
#ifndef RBIMPL_INTERN_COMPAR_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_COMPAR_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 Public APIs related to ::rb_mComparable.
*/
#include "ruby/internal/attr/cold.h"
#include "ruby/internal/attr/noreturn.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/* bignum.c */
/**
* Canonicalises the passed `val`, which is the return value of `a <=> b`, into
* C's `{-1, 0, 1}`. This can be handy when you implement a callback function
* to pass to `qsort(3)` etc.
*
* @param[in] val Return value of a space ship operator.
* @param[in] a Comparison LHS.
* @param[in] b Comparison RHS.
* @exception rb_eArgError `a` and `b` are not comparable each other.
* @retval -1 `val` is less than zero.
* @retval 0 `val` is equal to zero.
* @retval 1 `val` is greater than zero.
*/
int rb_cmpint(VALUE val, VALUE a, VALUE b);
/* compar.c */
RBIMPL_ATTR_COLD()
RBIMPL_ATTR_NORETURN()
/**
* Raises "comparison failed" error.
*
* @param[in] a Comparison LHS.
* @param[in] b Comparison RHS.
* @exception rb_eArgError `a` and `b` are not comparable each other.
*/
void rb_cmperr(VALUE a, VALUE b);
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_INTERN_COMPAR_H */
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