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62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
#ifndef RBIMPL_ARITHMETIC_OFF_T_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_ARITHMETIC_OFF_T_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
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* implementation details. Don't take them as canon. They could
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* rapidly appear then vanish. The name (path) of this header file
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* is also an implementation detail. Do not expect it to persist
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* at the place it is now. Developers are free to move it anywhere
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* anytime at will.
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* @note To ruby-core: remember that this header can be possibly
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* recursively included from extension libraries written in C++.
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* Do not expect for instance `__VA_ARGS__` is always available.
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* We assume C99 for ruby itself but we don't assume languages of
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* extension libraries. They could be written in C++98.
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* @brief Arithmetic conversion between C's `off_t` and Ruby's.
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*/
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#include "ruby/internal/config.h"
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#include "ruby/internal/arithmetic/int.h"
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#include "ruby/internal/arithmetic/long.h"
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#include "ruby/internal/arithmetic/long_long.h"
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#include "ruby/backward/2/long_long.h"
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/** Converts a C's `off_t` into an instance of ::rb_cInteger. */
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#ifdef OFFT2NUM
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# /* take that. */
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#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
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# define OFFT2NUM RB_LL2NUM
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#elif SIZEOF_OFF_T == SIZEOF_LONG
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# define OFFT2NUM RB_LONG2NUM
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#else
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# define OFFT2NUM RB_INT2NUM
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#endif
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/** Converts an instance of ::rb_cNumeric into C's `off_t`. */
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#ifdef NUM2OFFT
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# /* take that. */
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#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
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# define NUM2OFFT RB_NUM2LL
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#elif SIZEOF_OFF_T == SIZEOF_LONG
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# define NUM2OFFT RB_NUM2LONG
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#else
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# define NUM2OFFT RB_NUM2INT
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#endif
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/** A rb_sprintf() format prefix to be used for an `off_t` parameter. */
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#ifdef PRI_OFFT_PREFIX
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# /* take that. */
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#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
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# define PRI_OFFT_PREFIX PRI_LL_PREFIX
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#elif SIZEOF_OFF_T == SIZEOF_LONG
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# define PRI_OFFT_PREFIX PRI_LONG_PREFIX
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#else
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# define PRI_OFFT_PREFIX PRI_INT_PREFIX
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#endif
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#endif /* RBIMPL_ARITHMETIC_OFF_T_H */
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