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Diffstat (limited to 'include/ruby/internal/intern/range.h')
| -rw-r--r-- | include/ruby/internal/intern/range.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/include/ruby/internal/intern/range.h b/include/ruby/internal/intern/range.h new file mode 100644 index 0000000000..1f7d7c313f --- /dev/null +++ b/include/ruby/internal/intern/range.h @@ -0,0 +1,89 @@ +#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 */ |