Current File : //opt/alt/ruby32/include/ruby/internal/encoding/coderange.h
#ifndef RUBY_INTERNAL_ENCODING_CODERANGE_H /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY_INTERNAL_ENCODING_CODERANGE_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 Routines for code ranges.
*/
#include "ruby/internal/attr/const.h"
#include "ruby/internal/attr/pure.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/fl_type.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/** What rb_enc_str_coderange() returns. */
enum ruby_coderange_type {
/** The object's coderange is unclear yet. */
RUBY_ENC_CODERANGE_UNKNOWN = 0,
/** The object holds 0 to 127 inclusive and nothing else. */
RUBY_ENC_CODERANGE_7BIT = ((int)RUBY_FL_USER8),
/** The object's encoding and contents are consistent each other */
RUBY_ENC_CODERANGE_VALID = ((int)RUBY_FL_USER9),
/** The object holds invalid/malformed/broken character(s). */
RUBY_ENC_CODERANGE_BROKEN = ((int)(RUBY_FL_USER8|RUBY_FL_USER9)),
/** Where the coderange resides. */
RUBY_ENC_CODERANGE_MASK = (RUBY_ENC_CODERANGE_7BIT|
RUBY_ENC_CODERANGE_VALID|
RUBY_ENC_CODERANGE_BROKEN)
};
RBIMPL_ATTR_CONST()
/**
* @private
*
* This is an implementation detail of #RB_ENC_CODERANGE_CLEAN_P. People don't
* use it directly.
*
* @param[in] cr An enum ::ruby_coderange_type.
* @retval 1 It is.
* @retval 0 It isn't.
*/
static inline int
rb_enc_coderange_clean_p(int cr)
{
return (cr ^ (cr >> 1)) & RUBY_ENC_CODERANGE_7BIT;
}
RBIMPL_ATTR_CONST()
/**
* Queries if a code range is "clean". "Clean" in this context means it is
* known and valid.
*
* @param[in] cr An enum ::ruby_coderange_type.
* @retval 1 It is.
* @retval 0 It isn't.
*/
static inline bool
RB_ENC_CODERANGE_CLEAN_P(enum ruby_coderange_type cr)
{
return rb_enc_coderange_clean_p(cr);
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
/**
* Queries the (inline) code range of the passed object. The object must be
* capable of having inline encoding. Using this macro needs deep
* understanding of bit level object binary layout.
*
* @param[in] obj Target object.
* @return An enum ::ruby_coderange_type.
*/
static inline enum ruby_coderange_type
RB_ENC_CODERANGE(VALUE obj)
{
VALUE ret = RB_FL_TEST_RAW(obj, RUBY_ENC_CODERANGE_MASK);
return RBIMPL_CAST((enum ruby_coderange_type)ret);
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
/**
* Queries the (inline) code range of the passed object is
* ::RUBY_ENC_CODERANGE_7BIT. The object must be capable of having inline
* encoding. Using this macro needs deep understanding of bit level object
* binary layout.
*
* @param[in] obj Target object.
* @retval 1 It is ascii only.
* @retval 0 Otherwise (including cases when the range is not known).
*/
static inline bool
RB_ENC_CODERANGE_ASCIIONLY(VALUE obj)
{
return RB_ENC_CODERANGE(obj) == RUBY_ENC_CODERANGE_7BIT;
}
/**
* Destructively modifies the passed object so that its (inline) code range is
* the passed one. The object must be capable of having inline encoding.
* Using this macro needs deep understanding of bit level object binary layout.
*
* @param[out] obj Target object.
* @param[out] cr An enum ::ruby_coderange_type.
* @post `obj`'s code range is `cr`.
*/
static inline void
RB_ENC_CODERANGE_SET(VALUE obj, enum ruby_coderange_type cr)
{
RB_FL_UNSET_RAW(obj, RUBY_ENC_CODERANGE_MASK);
RB_FL_SET_RAW(obj, cr);
}
/**
* Destructively clears the passed object's (inline) code range. The object
* must be capable of having inline encoding. Using this macro needs deep
* understanding of bit level object binary layout.
*
* @param[out] obj Target object.
* @post `obj`'s code range is ::RUBY_ENC_CODERANGE_UNKNOWN.
*/
static inline void
RB_ENC_CODERANGE_CLEAR(VALUE obj)
{
RB_FL_UNSET_RAW(obj, RUBY_ENC_CODERANGE_MASK);
}
RBIMPL_ATTR_CONST()
/* assumed ASCII compatibility */
/**
* "Mix" two code ranges into one. This is handy for instance when you
* concatenate two strings into one. Consider one of then is valid but the
* other isn't. The result must be invalid. This macro computes that kind of
* mixture.
*
* @param[in] a An enum ::ruby_coderange_type.
* @param[in] b Another enum ::ruby_coderange_type.
* @return The `a` "and" `b`.
*/
static inline enum ruby_coderange_type
RB_ENC_CODERANGE_AND(enum ruby_coderange_type a, enum ruby_coderange_type b)
{
if (a == RUBY_ENC_CODERANGE_7BIT) {
return b;
}
else if (a != RUBY_ENC_CODERANGE_VALID) {
return RUBY_ENC_CODERANGE_UNKNOWN;
}
else if (b == RUBY_ENC_CODERANGE_7BIT) {
return RUBY_ENC_CODERANGE_VALID;
}
else {
return b;
}
}
#define ENC_CODERANGE_MASK RUBY_ENC_CODERANGE_MASK /**< @old{RUBY_ENC_CODERANGE_MASK} */
#define ENC_CODERANGE_UNKNOWN RUBY_ENC_CODERANGE_UNKNOWN /**< @old{RUBY_ENC_CODERANGE_UNKNOWN} */
#define ENC_CODERANGE_7BIT RUBY_ENC_CODERANGE_7BIT /**< @old{RUBY_ENC_CODERANGE_7BIT} */
#define ENC_CODERANGE_VALID RUBY_ENC_CODERANGE_VALID /**< @old{RUBY_ENC_CODERANGE_VALID} */
#define ENC_CODERANGE_BROKEN RUBY_ENC_CODERANGE_BROKEN /**< @old{RUBY_ENC_CODERANGE_BROKEN} */
#define ENC_CODERANGE_CLEAN_P(cr) RB_ENC_CODERANGE_CLEAN_P(cr) /**< @old{RB_ENC_CODERANGE_CLEAN_P} */
#define ENC_CODERANGE(obj) RB_ENC_CODERANGE(obj) /**< @old{RB_ENC_CODERANGE} */
#define ENC_CODERANGE_ASCIIONLY(obj) RB_ENC_CODERANGE_ASCIIONLY(obj) /**< @old{RB_ENC_CODERANGE_ASCIIONLY} */
#define ENC_CODERANGE_SET(obj,cr) RB_ENC_CODERANGE_SET(obj,cr) /**< @old{RB_ENC_CODERANGE_SET} */
#define ENC_CODERANGE_CLEAR(obj) RB_ENC_CODERANGE_CLEAR(obj) /**< @old{RB_ENC_CODERANGE_CLEAR} */
#define ENC_CODERANGE_AND(a, b) RB_ENC_CODERANGE_AND(a, b) /**< @old{RB_ENC_CODERANGE_AND} */
#define ENCODING_CODERANGE_SET(obj, encindex, cr) RB_ENCODING_CODERANGE_SET(obj, encindex, cr) /**< @old{RB_ENCODING_CODERANGE_SET} */
/** @cond INTERNAL_MACRO */
#define RB_ENC_CODERANGE RB_ENC_CODERANGE
#define RB_ENC_CODERANGE_AND RB_ENC_CODERANGE_AND
#define RB_ENC_CODERANGE_ASCIIONLY RB_ENC_CODERANGE_ASCIIONLY
#define RB_ENC_CODERANGE_CLEAN_P RB_ENC_CODERANGE_CLEAN_P
#define RB_ENC_CODERANGE_CLEAR RB_ENC_CODERANGE_CLEAR
#define RB_ENC_CODERANGE_SET RB_ENC_CODERANGE_SET
/** @endcond */
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RUBY_INTERNAL_ENCODING_CODERANGE_H */
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