Current File : //opt/alt/ruby32/include/ruby/internal/intern/range.h
#ifndef RBIMPL_INTERN_RANGE_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_RANGE_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_cRange.
*/
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/* range.c */
/**
* Creates a new Range.
*
* @param[in] beg "Left" or "lowest" endpoint of the range.
* @param[in] end "Right" or "highest" endpoint of the range.
* @param[in] excl Whether the range is open-ended.
* @exception rb_eArgError `beg` and `end` are not comparable.
* @note These days both endpoints can be ::RUBY_Qnil, which means that
* endpoint is unbound.
*/
VALUE rb_range_new(VALUE beg, VALUE end, int excl);
RBIMPL_ATTR_NONNULL(())
/**
* Deconstructs a numerical range. As the arguments are `long` based, it
* expects everything are in the `long` domain.
*
* @param[in] range A range of numerical endpoints.
* @param[out] begp Return value buffer.
* @param[out] lenp Return value buffer.
* @param[in] len Updated length.
* @param[in] err In case `len` is out of range...
* - `0`: returns ::RUBY_Qnil.
* - `1`: raises ::rb_eRangeError.
* - `2`: `beg` and `len` expanded accordingly.
* @exception rb_eTypeError `range` is not a numerical range.
* @exception rb_eRangeError `range` cannot fit into `long`.
* @retval RUBY_Qfalse `range` is not an ::rb_cRange.
* @retval RUBY_Qnil `len` is out of `range` but `err` is zero.
* @retval RUBY_Qtrue Otherwise.
* @post `beg` is the (possibly updated) left endpoint.
* @post `len` is the (possibly updated) length of the range.
*
* @internal
*
* The complex error handling switch reflects the fact that `Array#[]=` and
* `String#[]=` behave differently when they take ranges.
*/
VALUE rb_range_beg_len(VALUE range, long *begp, long *lenp, long len, int err);
RBIMPL_ATTR_NONNULL(())
/**
* Deconstructs a range into its components.
*
* @param[in] range Range or range-ish object.
* @param[out] begp Return value buffer.
* @param[out] endp Return value buffer.
* @param[out] exclp Return value buffer.
* @retval RUBY_Qfalse `range` is not an instance of ::rb_cRange.
* @retval RUBY_Qtrue Argument pointers are updated.
* @post `*begp` is the left endpoint of the range.
* @post `*endp` is the right endpoint of the range.
* @post `*exclp` is whether the range is open-ended or not.
*/
int rb_range_values(VALUE range, VALUE *begp, VALUE *endp, int *exclp);
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_INTERN_RANGE_H */
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