/*
* Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3.0 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3.0 along with this program. If not, see
* <https://www.gnu.org/licenses/>.
*/
#import "OFObject.h"
#import "OFString.h"
OF_ASSUME_NONNULL_BEGIN
/**
* @class OFCharacterSet OFCharacterSet.h ObjFW/ObjFW.h
*
* @brief A class cluster representing a character set.
*
* @note Subclasses must implement @ref characterIsMember:.
*/
@interface OFCharacterSet: OFObject
{
OF_RESERVE_IVARS(OFCharacterSet, 4)
}
#ifdef OF_HAVE_CLASS_PROPERTIES
@property (class, readonly, nonatomic) OFCharacterSet *whitespaceCharacterSet;
#endif
/**
* @brief The inverted set, containing only the characters that do not exist in
* the receiver.
*/
@property (readonly, nonatomic) OFCharacterSet *invertedSet;
/**
* @brief Creates a new character set containing the characters of the
* specified string.
*
* @param characters The characters for the character set
* @return A new OFCharacterSet
*/
+ (instancetype)characterSetWithCharactersInString: (OFString *)characters;
/**
* @brief Creates a new character set containing the characters in the specified
* range.
*
* @param range The range of characters for the character set
* @return A new OFCharacterSet
*/
+ (instancetype)characterSetWithRange: (OFRange)range;
/**
* @brief A character set containing all Unicode characters in the category
* `Zs` plus CHARACTER TABULATION (U+0009).
*/
+ (OFCharacterSet *)whitespaceCharacterSet;
/**
* @brief Initializes an already allocated character set with the characters of
* the specified string.
*
* @param characters The characters for the character set
* @return An initialized OFCharacterSet
*/
- (instancetype)initWithCharactersInString: (OFString *)characters;
/**
* @brief Initializes an already allocated character set with the characters in
* the specified range.
*
* @param range The range of characters for the character set
* @return An initialized OFCharacterSet
*/
- (instancetype)initWithRange: (OFRange)range;
/**
* @brief Returns whether the specified character is a member of the character
* set.
*
* @param character The character that is checked for being a member of the
* character set
* @return Whether the specified character is a member of the character set.
*/
- (bool)characterIsMember: (OFUnichar)character;
@end
OF_ASSUME_NONNULL_END