(892c46283a5ea4179500d951c9d4866c0051f27b)

Arithmetic conversion between C's char and Ruby's. More...

#include "ruby/internal/arithmetic/int.h"
#include "ruby/internal/arithmetic/long.h"
#include "ruby/internal/attr/artificial.h"
#include "ruby/internal/attr/const.h"
#include "ruby/internal/attr/constexpr.h"
#include "ruby/internal/cast.h"
#include "ruby/internal/core/rstring.h"
#include "ruby/internal/value_type.h"

Include dependency graph for char.h:

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Macros
#define	RB_NUM2CHR rb_num2char_inline
	Just another name of rb_num2char_inline. More...

#define	NUM2CHR RB_NUM2CHR
	Old name of RB_NUM2CHR. More...

#define	CHR2FIX RB_CHR2FIX
	Old name of RB_CHR2FIX. More...

Functions
static VALUE	RB_CHR2FIX (unsigned char c)
	Converts a C's `unsigned char` into an instance of rb_cInteger. More...

static char	rb_num2char_inline (VALUE x)
	Converts an instance of rb_cNumeric into C's `char`. More...

Detailed Description

Arithmetic conversion between C's char and Ruby's.

Author: Ruby developers ruby-.nosp@m.core.nosp@m.@ruby.nosp@m.-lan.nosp@m.g.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.

Definition in file char.h.

Macro Definition Documentation

◆ RB_NUM2CHR

#define RB_NUM2CHR rb_num2char_inline

Just another name of rb_num2char_inline.

Definition at line 32 of file char.h.

Function Documentation

◆ RB_CHR2FIX()

static VALUE RB_CHR2FIX ( unsigned char c )

inlinestatic

Converts a C's unsigned char into an instance of rb_cInteger.

Parameters

[in] c Arbitrary unsigned char value.

Returns: An instance of rb_cInteger.

Definition at line 56 of file char.h.

◆ rb_num2char_inline()

static char rb_num2char_inline ( VALUE x )

inlinestatic

Converts an instance of rb_cNumeric into C's char.

At the same time it accepts a String of more than one character, and returns its first byte. In the early days there was a Ruby level "character" literal ?c, which roughly worked this way.

Parameters

[in] x Either a string or a numeric.

Exceptions

rb_eTypeError	`x` is not a numeric.
rb_eRangeError	`x` is out of range of `unsigned int`.

Returns: The passed value converted into C's char.

Definition at line 73 of file char.h.