/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018
 *   Jonathan Schleifer <js@heap.zone>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#ifndef __STDC_LIMIT_MACROS
# define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
# define __STDC_CONSTANT_MACROS
#endif

#import "objfw-defs.h"

#ifdef OF_HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#include <stdarg.h>
#include <stdint.h>

#import "OFObject.h"
#import "OFSerialization.h"
#import "OFJSONRepresentation.h"
#import "OFMessagePackRepresentation.h"

OF_ASSUME_NONNULL_BEGIN

/*! @file */

@class OFConstantString;

#if defined(__cplusplus) && __cplusplus >= 201103L
typedef char16_t of_char16_t;
typedef char32_t of_char32_t;
#else
typedef uint_least16_t of_char16_t;
typedef uint_least32_t of_char32_t;
#endif
typedef of_char32_t of_unichar_t;

/*!
 * @brief The encoding of a string.
 */
typedef enum of_string_encoding_t {
	/*
	 * UTF-8 *has* to be 0, so that if the @ref OFLocalization singleton is
	 * `nil`, `[OFLocalization encoding]` returns UTF-8.
	 */
	/*! UTF-8 */
	OF_STRING_ENCODING_UTF_8,
	/*! ASCII */
	OF_STRING_ENCODING_ASCII,
	/*! ISO 8859-1 */
	OF_STRING_ENCODING_ISO_8859_1,
	/*! ISO 8859-2 */
	OF_STRING_ENCODING_ISO_8859_2,
	/*! ISO 8859-3 */
	OF_STRING_ENCODING_ISO_8859_3,
	/*! ISO 8859-15 */
	OF_STRING_ENCODING_ISO_8859_15,
	/*! Windows-1251 */
	OF_STRING_ENCODING_WINDOWS_1251,
	/*! Windows-1252 */
	OF_STRING_ENCODING_WINDOWS_1252,
	/*! Codepage 437 */
	OF_STRING_ENCODING_CODEPAGE_437,
	/*! Codepage 850 */
	OF_STRING_ENCODING_CODEPAGE_850,
	/*! Codepage 858 */
	OF_STRING_ENCODING_CODEPAGE_858,
	/*! Mac OS Roman */
	OF_STRING_ENCODING_MAC_ROMAN,
	/*! KOI8-R */
	OF_STRING_ENCODING_KOI8_R,
	/*! KOI8-U */
	OF_STRING_ENCODING_KOI8_U,
	/*! Try to automatically detect the encoding */
	OF_STRING_ENCODING_AUTODETECT = 0xFF
} of_string_encoding_t;

enum {
	OF_STRING_SEARCH_BACKWARDS = 1,
	OF_STRING_SKIP_EMPTY	   = 2
};

#ifdef OF_HAVE_BLOCKS
/*!
 * @brief A block for enumerating the lines of a string.
 *
 * @param line The current line
 * @param stop A pointer to a variable that can be set to true to stop the
 *	       enumeration
 */
typedef void (^of_string_line_enumeration_block_t)(OFString *line, bool *stop);
#endif

@class OFArray OF_GENERIC(ObjectType);
@class OFCharacterSet;
@class OFURL;

/*!
 * @class OFString OFString.h ObjFW/OFString.h
 *
 * @brief A class for handling strings.
 */
@interface OFString: OFObject <OFCopying, OFMutableCopying, OFComparing,
    OFSerialization, OFJSONRepresentation, OFMessagePackRepresentation>

/*!
 * @brief The length of the string in Unicode codepoints.
 */
@property (readonly, nonatomic) size_t length;

/*!
 * @brief The OFString as a UTF-8 encoded C string.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 */
@property (readonly, nonatomic) const char *UTF8String OF_RETURNS_INNER_POINTER;

/*!
 * @brief The number of bytes the string needs in UTF-8 encoding.
 */
@property (readonly, nonatomic) size_t UTF8StringLength;

/*!
 * @brief The components of the string when interpreted as a path.
 */
@property (readonly, nonatomic) OFArray OF_GENERIC(OFString *) *pathComponents;

/*!
 * @brief The last path component of the string when interpreted as a path.
 */
@property (readonly, nonatomic) OFString *lastPathComponent;

/*!
 * @brief The file extension of string when interpreted as a path.
 */
@property (readonly, nonatomic) OFString *pathExtension;

/*!
 * @brief The string in uppercase.
 */
@property (readonly, nonatomic) OFString *uppercaseString;

/*!
 * @brief The string in lowercase.
 */
@property (readonly, nonatomic) OFString *lowercaseString;

/*!
 * @brief The string in capitalized form.
 *
 * @note This only considers spaces, tabs and newlines to be word delimiters!
 *	 Also note that this might change in the future to all word delimiters
 *	 specified by Unicode!
 */
@property (readonly, nonatomic) OFString *capitalizedString;

/*!
 * @brief The decimal value of the string as an `intmax_t`.
 *
 * Leading and trailing whitespaces are ignored.
 *
 * If the string contains any non-number characters, an
 * @ref OFInvalidEncodingException is thrown.
 *
 * If the number is too big to fit into an `intmax_t`, an
 * @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) intmax_t decimalValue;

/*!
 * @brief The hexadecimal value of the string as an `uintmax_t`.
 *
 * Leading and trailing whitespaces are ignored.
 *
 * If the string contains any non-number characters, an
 * @ref OFInvalidEncodingException is thrown.
 *
 * If the number is too big to fit into an `uintmax_t`, an
 * @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) uintmax_t hexadecimalValue;

/*!
 * @brief The octal value of the string as an `uintmax_t`.
 *
 * Leading and trailing whitespaces are ignored.
 *
 * If the string contains any non-number characters, an
 * @ref OFInvalidEncodingException is thrown.
 *
 * If the number is too big to fit into an `uintmax_t`, an
 * @ref OFOutOfRangeException is thrown.
 */
@property (readonly, nonatomic) uintmax_t octalValue;

/*!
 * @brief The float value of the string as a float.
 *
 * If the string contains any non-number characters, an
 * @ref OFInvalidEncodingException is thrown.
 */
@property (readonly, nonatomic) float floatValue;

/*!
 * @brief The double value of the string as a double.
 *
 * If the string contains any non-number characters, an
 * OFInvalidEncodingException is thrown.
 */
@property (readonly, nonatomic) double doubleValue;

/*!
 * @brief The directory name of the string when interpreted as a path.
 */
@property (readonly, nonatomic) OFString *stringByDeletingLastPathComponent;

/*!
 * @brief The string with the file extension of the path removed.
 */
@property (readonly, nonatomic) OFString *stringByDeletingPathExtension;

/*!
 * @brief The string interpreted as a path with relative sub paths resolved.
 */
@property (readonly, nonatomic) OFString *stringByStandardizingPath;

/*!
 * @brief The string interpreted as a URL path with relative sub paths resolved.
 *
 * This works similar to @ref stringByStandardizingPath, but is intended for
 * standardization of paths that are part of a URL.
 */
@property (readonly, nonatomic) OFString *stringByStandardizingURLPath;

/*!
 * @brief The string as an array of Unicode characters.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 */
@property (readonly, nonatomic) const of_unichar_t *characters
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief The string in UTF-16 encoding with native byte order.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 */
@property (readonly, nonatomic) const of_char16_t *UTF16String
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief The length of the string in UTF-16 characters.
 */
@property (readonly, nonatomic) size_t UTF16StringLength;

/*!
 * @brief The string in UTF-32 encoding with native byte order.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 */
@property (readonly, nonatomic) const of_char32_t *UTF32String
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief The string with leading whitespaces deleted.
 */
@property (readonly, nonatomic) OFString *stringByDeletingLeadingWhitespaces;

/*!
 * @brief The string with trailing whitespaces deleted.
 */
@property (readonly, nonatomic) OFString *stringByDeletingTrailingWhitespaces;

/*!
 * @brief The string with leading and trailing whitespaces deleted.
 */
@property (readonly, nonatomic) OFString *stringByDeletingEnclosingWhitespaces;

#ifdef OF_HAVE_UNICODE_TABLES
/*!
 * @brief The string in Unicode Normalization Form D (NFD).
 */
@property (readonly, nonatomic) OFString *decomposedStringWithCanonicalMapping;

/*!
 * @brief The string in Unicode Normalization Form KD (NFKD).
 */
@property (readonly, nonatomic)
    OFString *decomposedStringWithCompatibilityMapping;
#endif

/*!
 * @brief Creates a new OFString.
 *
 * @return A new, autoreleased OFString
 */
+ (instancetype)string;

/*!
 * @brief Creates a new OFString from a UTF-8 encoded C string.
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF8String: (const char *)UTF8String;

/*!
 * @brief Creates a new OFString from a UTF-8 encoded C string with the
 *	  specified length.
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param UTF8StringLength The length of the UTF-8 encoded C string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF8String: (const char *)UTF8String
			      length: (size_t)UTF8StringLength;

/*!
 * @brief Creates a new OFString from a UTF-8 encoded C string without copying
 *	  the string, if possible.
 *
 * If initialization fails for whatever reason, the passed C string is free'd
 * if `freeWhenDone` is true.
 *
 * @note OFMutableString always creates a copy!
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param freeWhenDone Whether to free the C string when the OFString gets
 *		       deallocated
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF8StringNoCopy: (char *)UTF8String
			      freeWhenDone: (bool)freeWhenDone;

/*!
 * @brief Creates a new OFString from a UTF-8 encoded C string with the
 *	  specified length without copying the string, if possible.
 *
 * If initialization fails for whatever reason, the passed C string is free'd
 * if `freeWhenDone` is true.
 *
 * @note OFMutableString always creates a copy!
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param UTF8StringLength The length of the UTF-8 encoded C string
 * @param freeWhenDone Whether to free the C string when the OFString gets
 *		       deallocated
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF8StringNoCopy: (char *)UTF8String
				    length: (size_t)UTF8StringLength
			      freeWhenDone: (bool)freeWhenDone;

/*!
 * @brief Creates a new OFString from a C string with the specified encoding.
 *
 * @param cString A C string to initialize the OFString with
 * @param encoding The encoding of the C string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithCString: (const char *)cString
			 encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Creates a new OFString from a C string with the specified encoding
 *	  and length.
 *
 * @param cString A C string to initialize the OFString with
 * @param encoding The encoding of the C string
 * @param cStringLength The length of the C string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithCString: (const char *)cString
			 encoding: (of_string_encoding_t)encoding
			   length: (size_t)cStringLength;

/*!
 * @brief Creates a new OFString from OFData with the specified encoding.
 *
 * @param data OFData with the contents of the string
 * @param encoding The encoding in which the string is stored in the OFData
 * @return An new autoreleased OFString
 */
+ (instancetype)stringWithData: (OFData *)data
		      encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Creates a new OFString from another string.
 *
 * @param string A string to initialize the OFString with
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithString: (OFString *)string;

/*!
 * @brief Creates a new OFString from a Unicode string with the specified
 *	  length.
 *
 * @param characters An array of Unicode characters
 * @param length The length of the Unicode character array
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithCharacters: (const of_unichar_t *)characters
			      length: (size_t)length;

/*!
 * @brief Creates a new OFString from a UTF-16 encoded string.
 *
 * @param string The UTF-16 string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF16String: (const of_char16_t *)string;

/*!
 * @brief Creates a new OFString from a UTF-16 encoded string with the
 *	  specified length.
 *
 * @param string The UTF-16 string
 * @param length The length of the UTF-16 string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF16String: (const of_char16_t *)string
			       length: (size_t)length;

/*!
 * @brief Creates a new OFString from a UTF-16 encoded string, assuming the
 *	  specified byte order if no byte order mark is found.
 *
 * @param string The UTF-16 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF16String: (const of_char16_t *)string
			    byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Creates a new OFString from a UTF-16 encoded string with the
 *	  specified length, assuming the specified byte order if no byte order
 *	  mark is found.
 *
 * @param string The UTF-16 string
 * @param length The length of the UTF-16 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF16String: (const of_char16_t *)string
			       length: (size_t)length
			    byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Creates a new OFString from a UTF-32 encoded string.
 *
 * @param string The UTF-32 string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF32String: (const of_char32_t *)string;

/*!
 * @brief Creates a new OFString from a UTF-32 encoded string with the
 *	  specified length.
 *
 * @param string The UTF-32 string
 * @param length The length of the UTF-32 string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF32String: (const of_char32_t *)string
			       length: (size_t)length;

/*!
 * @brief Creates a new OFString from a UTF-32 encoded string, assuming the
 *	  specified byte order if no byte order mark is found.
 *
 * @param string The UTF-32 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF32String: (const of_char32_t *)string
			    byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Creates a new OFString from a UTF-32 encoded string with the
 *	  specified length, assuming the specified byte order if no byte order
 *	  mark is found.
 *
 * @param string The UTF-32 string
 * @param length The length of the UTF-32 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithUTF32String: (const of_char32_t *)string
			       length: (size_t)length
			    byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Creates a new OFString from a format string.
 *
 * See printf for the format syntax. As an addition, `%@` is available as
 * format specifier for objects, `%C` for `of_unichar_t` and `%S` for
 * `const of_unichar_t *`.
 *
 * @param format A string used as format to initialize the OFString
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithFormat: (OFConstantString *)format, ...;

#ifdef OF_HAVE_FILES
/*!
 * @brief Creates a new OFString with the contents of the specified UTF-8
 *	  encoded file.
 *
 * @param path The path to the file
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithContentsOfFile: (OFString *)path;

/*!
 * @brief Creates a new OFString with the contents of the specified file in the
 *	  specified encoding.
 *
 * @param path The path to the file
 * @param encoding The encoding of the file
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithContentsOfFile: (OFString *)path
				encoding: (of_string_encoding_t)encoding;
#endif

#if defined(OF_HAVE_FILES) || defined(OF_HAVE_SOCKETS)
/*!
 * @brief Creates a new OFString with the contents of the specified URL.
 *
 * If the URL's scheme is file, it tries UTF-8 encoding.
 *
 * If the URL's scheme is http(s), it tries to detect the encoding from the HTTP
 * headers. If it could not detect the encoding using the HTTP headers, it tries
 * UTF-8.
 *
 * @param URL The URL to the contents for the string
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithContentsOfURL: (OFURL *)URL;

/*!
 * @brief Creates a new OFString with the contents of the specified URL in the
 *	  specified encoding.
 *
 * @param URL The URL to the contents for the string
 * @param encoding The encoding to assume
 * @return A new autoreleased OFString
 */
+ (instancetype)stringWithContentsOfURL: (OFURL *)URL
			       encoding: (of_string_encoding_t)encoding;
#endif

/*!
 * @brief Creates a path from the specified path components.
 *
 * @param components An array of components for the path
 * @return A new autoreleased OFString
 */
+ (OFString *)pathWithComponents: (OFArray OF_GENERIC(OFString *) *)components;

/*!
 * @brief Initializes an already allocated OFString from a UTF-8 encoded C
 *	  string.
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @return An initialized OFString
 */
- (instancetype)initWithUTF8String: (const char *)UTF8String;

/*!
 * @brief Initializes an already allocated OFString from a UTF-8 encoded C
 *	  string with the specified length.
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param UTF8StringLength The length of the UTF-8 encoded C string
 * @return An initialized OFString
 */
- (instancetype)initWithUTF8String: (const char *)UTF8String
			    length: (size_t)UTF8StringLength;

/*!
 * @brief Initializes an already allocated OFString from an UTF-8 encoded C
 *	  string without copying the string, if possible.
 *
 * If initialization fails for whatever reason, the passed C string is free'd
 * if `freeWhenDone` is true.
 *
 * @note OFMutableString always creates a copy!
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param freeWhenDone Whether to free the C string when it is not needed
 *		       anymore
 * @return An initialized OFString
 */
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
			    freeWhenDone: (bool)freeWhenDone;

/*!
 * @brief Initializes an already allocated OFString from an UTF-8 encoded C
 *	  string with the specified length without copying the string, if
 *	  possible.
 *
 * If initialization fails for whatever reason, the passed C string is free'd
 * if `freeWhenDone` is true.
 *
 * @note OFMutableString always creates a copy!
 *
 * @param UTF8String A UTF-8 encoded C string to initialize the OFString with
 * @param UTF8StringLength The length of the UTF-8 encoded C string
 * @param freeWhenDone Whether to free the C string when it is not needed
 *		       anymore
 * @return An initialized OFString
 */
- (instancetype)initWithUTF8StringNoCopy: (char *)UTF8String
				  length: (size_t)UTF8StringLength
			    freeWhenDone: (bool)freeWhenDone;

/*!
 * @brief Initializes an already allocated OFString from a C string with the
 *	  specified encoding.
 *
 * @param cString A C string to initialize the OFString with
 * @param encoding The encoding of the C string
 * @return An initialized OFString
 */
- (instancetype)initWithCString: (const char *)cString
		       encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Initializes an already allocated OFString from a C string with the
 *	  specified encoding and length.
 *
 * @param cString A C string to initialize the OFString with
 * @param encoding The encoding of the C string
 * @param cStringLength The length of the C string
 * @return An initialized OFString
 */
- (instancetype)initWithCString: (const char *)cString
		       encoding: (of_string_encoding_t)encoding
			 length: (size_t)cStringLength;

/*!
 * @brief Initializes an already allocated OFString from OFData with the
 *	  specified encoding.
 *
 * @param data OFData with the contents of the string
 * @param encoding The encoding in which the string is stored in the OFData
 * @return An initialized OFString
 */
- (instancetype)initWithData: (OFData *)data
		    encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Initializes an already allocated OFString with another string.
 *
 * @param string A string to initialize the OFString with
 * @return An initialized OFString
 */
- (instancetype)initWithString: (OFString *)string;

/*!
 * @brief Initializes an already allocated OFString with a Unicode string with
 *	  the specified length.
 *
 * @param characters An array of Unicode characters
 * @param length The length of the Unicode character array
 * @return An initialized OFString
 */
- (instancetype)initWithCharacters: (const of_unichar_t *)characters
			    length: (size_t)length;

/*!
 * @brief Initializes an already allocated OFString with a UTF-16 string.
 *
 * @param string The UTF-16 string
 * @return An initialized OFString
 */
- (instancetype)initWithUTF16String: (const of_char16_t *)string;

/*!
 * @brief Initializes an already allocated OFString with a UTF-16 string with
 *	  the specified length.
 *
 * @param string The UTF-16 string
 * @param length The length of the UTF-16 string
 * @return An initialized OFString
 */
- (instancetype)initWithUTF16String: (const of_char16_t *)string
			     length: (size_t)length;

/*!
 * @brief Initializes an already allocated OFString with a UTF-16 string,
 *	  assuming the specified byte order if no byte order mark is found.
 *
 * @param string The UTF-16 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return An initialized OFString
 */
- (instancetype)initWithUTF16String: (const of_char16_t *)string
			  byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Initializes an already allocated OFString with a UTF-16 string with
 *	  the specified length, assuming the specified byte order if no byte
 *	  order mark is found.
 *
 * @param string The UTF-16 string
 * @param length The length of the UTF-16 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return An initialized OFString
 */
- (instancetype)initWithUTF16String: (const of_char16_t *)string
			     length: (size_t)length
			  byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Initializes an already allocated OFString with a UTF-32 string.
 *
 * @param string The UTF-32 string
 * @return An initialized OFString
 */
- (instancetype)initWithUTF32String: (const of_char32_t *)string;

/*!
 * @brief Initializes an already allocated OFString with a UTF-32 string with
 *	  the specified length
 *
 * @param string The UTF-32 string
 * @param length The length of the UTF-32 string
 * @return An initialized OFString
 */
- (instancetype)initWithUTF32String: (const of_char32_t *)string
			     length: (size_t)length;

/*!
 * @brief Initializes an already allocated OFString with a UTF-32 string,
 *	  assuming the specified byte order if no byte order mark is found.
 *
 * @param string The UTF-32 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return An initialized OFString
 */
- (instancetype)initWithUTF32String: (const of_char32_t *)string
			  byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Initializes an already allocated OFString with a UTF-32 string with
 *	  the specified length, assuming the specified byte order if no byte
 *	  order mark is found.
 *
 * @param string The UTF-32 string
 * @param length The length of the UTF-32 string
 * @param byteOrder The byte order to assume if there is no byte order mark
 * @return An initialized OFString
 */
- (instancetype)initWithUTF32String: (const of_char32_t *)string
			     length: (size_t)length
			  byteOrder: (of_byte_order_t)byteOrder;

/*!
 * @brief Initializes an already allocated OFString with a format string.
 *
 * See printf for the format syntax. As an addition, `%@` is available as
 * format specifier for objects, `%C` for `of_unichar_t` and `%S` for
 * `const of_unichar_t *`.
 *
 * @param format A string used as format to initialize the OFString
 * @return An initialized OFString
 */
- (instancetype)initWithFormat: (OFConstantString *)format, ...;

/*!
 * @brief Initializes an already allocated OFString with a format string.
 *
 * See printf for the format syntax. As an addition, `%@` is available as
 * format specifier for objects, `%C` for `of_unichar_t` and `%S` for
 * `const of_unichar_t *`.
 *
 * @param format A string used as format to initialize the OFString
 * @param arguments The arguments used in the format string
 * @return An initialized OFString
 */
- (instancetype)initWithFormat: (OFConstantString *)format
		     arguments: (va_list)arguments;

#ifdef OF_HAVE_FILES
/*!
 * @brief Initializes an already allocated OFString with the contents of the
 *	  specified file in the specified encoding.
 *
 * @param path The path to the file
 * @return An initialized OFString
 */
- (instancetype)initWithContentsOfFile: (OFString *)path;

/*!
 * @brief Initializes an already allocated OFString with the contents of the
 *	  specified file in the specified encoding.
 *
 * @param path The path to the file
 * @param encoding The encoding of the file
 * @return An initialized OFString
 */
- (instancetype)initWithContentsOfFile: (OFString *)path
			      encoding: (of_string_encoding_t)encoding;
#endif

/*!
 * @brief Initializes an already allocated OFString with the contents of the
 *	  specified URL.
 *
 * If the URL's scheme is file, it tries UTF-8 encoding.
 *
 * If the URL's scheme is http(s), it tries to detect the encoding from the HTTP
 * headers. If it could not detect the encoding using the HTTP headers, it tries
 * UTF-8.
 *
 * @param URL The URL to the contents for the string
 * @return An initialized OFString
 */
- (instancetype)initWithContentsOfURL: (OFURL *)URL;

/*!
 * @brief Initializes an already allocated OFString with the contents of the
 *	  specified URL in the specified encoding.
 *
 * @param URL The URL to the contents for the string
 * @param encoding The encoding to assume
 * @return An initialized OFString
 */
- (instancetype)initWithContentsOfURL: (OFURL *)URL
			     encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Writes the OFString into the specified C string with the specified
 *	  encoding.
 *
 * @param cString The C string to write into
 * @param maxLength The maximum number of bytes to write into the C string,
 *		    including the terminating zero
 * @param encoding The encoding to use for writing into the C string
 * @return The number of bytes written into the C string, without the
 *	   terminating zero
 */
- (size_t)getCString: (char *)cString
	   maxLength: (size_t)maxLength
	    encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Writes the OFString into the specified C string with the specified
 *	  encoding, replacing characters that cannot be represented in the
 *	  specified encoding with a question mark.
 *
 * @param cString The C string to write into
 * @param maxLength The maximum number of bytes to write into the C string,
 *		    including the terminating zero
 * @param encoding The encoding to use for writing into the C string
 * @return The number of bytes written into the C string, without the
 *	   terminating zero
 */
- (size_t)getLossyCString: (char *)cString
		maxLength: (size_t)maxLength
		 encoding: (of_string_encoding_t)encoding;

/*!
 * @brief Returns the OFString as a C string in the specified encoding.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 *
 * @param encoding The encoding for the C string
 * @return The OFString as a C string in the specified encoding
 */
- (const char *)cStringWithEncoding: (of_string_encoding_t)encoding
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief Returns the OFString as a C string in the specified encoding,
 *	  replacing characters that cannot be represented in the specified
 *	  encoding with a question mark.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 *
 * @param encoding The encoding for the C string
 * @return The OFString as a C string in the specified encoding
 */
- (const char *)lossyCStringWithEncoding: (of_string_encoding_t)encoding
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief Returns the number of bytes the string needs in the specified
 *	  encoding.
 *
 * @param encoding The encoding for the string
 * @return The number of bytes the string needs in the specified encoding.
 */
- (size_t)cStringLengthWithEncoding: (of_string_encoding_t)encoding;

/*!
 * @brief Compares the OFString to another OFString without caring about the
 *	  case.
 *
 * @param otherString A string to compare with
 * @return An of_comparison_result_t
 */
- (of_comparison_result_t)caseInsensitiveCompare: (OFString *)otherString;

/*!
 * @brief Returns the Unicode character at the specified index.
 *
 * @param index The index of the Unicode character to return
 * @return The Unicode character at the specified index
 */
- (of_unichar_t)characterAtIndex: (size_t)index;

/*!
 * @brief Copies the Unicode characters in the specified range to the specified
 *	  buffer.
 *
 * @param buffer The buffer to store the Unicode characters
 * @param range The range of the Unicode characters to copy
 */
- (void)getCharacters: (of_unichar_t *)buffer
	      inRange: (of_range_t)range;

/*!
 * @brief Returns the range of the first occurrence of the string.
 *
 * @param string The string to search
 * @return The range of the first occurrence of the string or a range with
 *	   `OF_NOT_FOUND` as start position if it was not found
 */
- (of_range_t)rangeOfString: (OFString *)string;

/*!
 * @brief Returns the range of the string.
 *
 * @param string The string to search
 * @param options Options modifying search behavior.@n
 *		  Possible values are:
 *		  Value                        | Description
 *		  -----------------------------|-------------------------------
 *		  `OF_STRING_SEARCH_BACKWARDS` | Search backwards in the string
 * @return The range of the first occurrence of the string or a range with
 *	   `OF_NOT_FOUND` as start position if it was not found
 */
- (of_range_t)rangeOfString: (OFString *)string
		    options: (int)options;

/*!
 * @brief Returns the range of the string in the specified range.
 *
 * @param string The string to search
 * @param options Options modifying search behaviour.@n
 *		  Possible values are:
 *		  Value                        | Description
 *		  -----------------------------|-------------------------------
 *		  `OF_STRING_SEARCH_BACKWARDS` | Search backwards in the string
 * @param range The range in which to search
 * @return The range of the first occurrence of the string or a range with
 *	   `OF_NOT_FOUND` as start position if it was not found
 */
- (of_range_t)rangeOfString: (OFString *)string
		    options: (int)options
		      range: (of_range_t)range;

/*!
 * @brief Returns the index of the first character from the set.
 *
 * @param characterSet The set of characters to search for
 * @return The index of the first occurrence of a character from the set or
 *	   `OF_NOT_FOUND` if it was not found
 */
- (size_t)indexOfCharacterFromSet: (OFCharacterSet *)characterSet;

/*!
 * @brief Returns the index of the first character from the set.
 *
 * @param characterSet The set of characters to search for
 * @param options Options modifying search behaviour.@n
 *		  Possible values are:
 *		  Value                        | Description
 *		  -----------------------------|-------------------------------
 *		  `OF_STRING_SEARCH_BACKWARDS` | Search backwards in the string
 * @return The index of the first occurrence of a character from the set or
 *	   `OF_NOT_FOUND` if it was not found
 */
- (size_t)indexOfCharacterFromSet: (OFCharacterSet *)characterSet
			  options: (int)options;

/*!
 * @brief Returns the index of the first character from the set.
 *
 * @param characterSet The set of characters to search for
 * @param options Options modifying search behaviour.@n
 *		  Possible values are:
 *		  Value                        | Description
 *		  -----------------------------|-------------------------------
 *		  `OF_STRING_SEARCH_BACKWARDS` | Search backwards in the string
 * @param range The range in which to search
 * @return The index of the first occurrence of a character from the set or
 *	   `OF_NOT_FOUND` if it was not found
 */
- (size_t)indexOfCharacterFromSet: (OFCharacterSet *)characterSet
			  options: (int)options
			    range: (of_range_t)range;

/*!
 * @brief Returns whether the string contains the specified string.
 *
 * @param string The string to search
 * @return Whether the string contains the specified string
 */
- (bool)containsString: (OFString *)string;

/*!
 * @brief Creates a substring with the specified range.
 *
 * @param range The range of the substring
 * @return The substring as a new autoreleased OFString
 */
- (OFString *)substringWithRange: (of_range_t)range;

/*!
 * @brief Creates a new string by appending another string.
 *
 * @param string The string to append
 * @return A new, autoreleased OFString with the specified string appended
 */
- (OFString *)stringByAppendingString: (OFString *)string;

/*!
 * @brief Creates a new string by appending the specified format.
 *
 * @param format A format string which generates the string to append
 * @return A new, autoreleased OFString with the specified format appended
 */
- (OFString *)stringByAppendingFormat: (OFConstantString *)format, ...;

/*!
 * @brief Creates a new string by appending the specified format.
 *
 * @param format A format string which generates the string to append
 * @param arguments The arguments used in the format string
 * @return A new, autoreleased OFString with the specified format appended
 */
- (OFString *)stringByAppendingFormat: (OFConstantString *)format
			    arguments: (va_list)arguments;

/*!
 * @brief Creates a new string by appending a path component.
 *
 * @param component The path component to append
 * @return A new, autoreleased OFString with the path component appended
 */
- (OFString *)stringByAppendingPathComponent: (OFString *)component;

/*!
 * @brief Creates a new string by appending a URL path component.
 *
 * @param component The URL path component to append
 * @return A new, autoreleased OFString with the URL path component appended
 */
- (OFString *)stringByAppendingURLPathComponent: (OFString *)component;

/*!
 * @brief Creates a new string by prepending another string.
 *
 * @param string The string to prepend
 * @return A new autoreleased OFString with the specified string prepended
 */
- (OFString *)stringByPrependingString: (OFString *)string;

/*!
 * @brief Creates a new string by replacing the occurrences of the specified
 *	  string with the specified replacement.
 *
 * @param string The string to replace
 * @param replacement The string with which it should be replaced
 * @return A new string with the occurrences of the specified string replaced
 */
- (OFString *)stringByReplacingOccurrencesOfString: (OFString *)string
					withString: (OFString *)replacement;

/*!
 * @brief Creates a new string by replacing the occurrences of the specified
 *	  string in the specified range with the specified replacement.
 *
 * @param string The string to replace
 * @param replacement The string with which it should be replaced
 * @param options Options modifying search behaviour.
 *		  Possible values are:
 *		    * None yet
 * @param range The range in which to replace the string
 * @return A new string with the occurrences of the specified string replaced
 */
- (OFString *)stringByReplacingOccurrencesOfString: (OFString *)string
					withString: (OFString *)replacement
					   options: (int)options
					     range: (of_range_t)range;

/*!
 * @brief Checks whether the string has the specified prefix.
 *
 * @param prefix The prefix to check for
 * @return A boolean whether the string has the specified prefix
 */
- (bool)hasPrefix: (OFString *)prefix;

/*!
 * @brief Checks whether the string has the specified suffix.
 *
 * @param suffix The suffix to check for
 * @return A boolean whether the string has the specified suffix
 */
- (bool)hasSuffix: (OFString *)suffix;

/*!
 * @brief Separates an OFString into an OFArray of OFStrings.
 *
 * @param delimiter The delimiter for separating
 * @return An autoreleased OFArray with the separated string
 */
- (OFArray OF_GENERIC(OFString *) *)componentsSeparatedByString:
    (OFString *)delimiter;

/*!
 * @brief Separates an OFString into an OFArray of OFStrings.
 *
 * @param delimiter The delimiter for separating
 * @param options Options according to which the string should be separated.@n
 *		  Possible values are:
 *		  Value                  | Description
 *		  -----------------------|----------------------
 * 		  `OF_STRING_SKIP_EMPTY` | Skip empty components
 * @return An autoreleased OFArray with the separated string
 */
- (OFArray OF_GENERIC(OFString *) *)
    componentsSeparatedByString: (OFString *)delimiter
			options: (int)options;

/*!
 * @brief Returns the string in UTF-16 encoding with the specified byte order.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 *
 * @param byteOrder The byte order for the UTF-16 encoding
 * @return The string in UTF-16 encoding with the specified byte order
 */
- (const of_char16_t *)UTF16StringWithByteOrder: (of_byte_order_t)byteOrder
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief Returns the string in UTF-32 encoding with the specified byte order.
 *
 * The result is valid until the autorelease pool is released. If you want to
 * use the result outside the scope of the current autorelease pool, you have to
 * copy it.
 *
 * @param byteOrder The byte order for the UTF-32 encoding
 * @return The string in UTF-32 encoding with the specified byte order
 */
- (const of_char32_t *)UTF32StringWithByteOrder: (of_byte_order_t)byteOrder
    OF_RETURNS_INNER_POINTER;

/*!
 * @brief Returns the string as OFData with the specified encoding.
 *
 * @param encoding The encoding to use for the returned OFData
 * @return The string as OFData with the specified encoding
 */
- (OFData *)dataWithEncoding: (of_string_encoding_t)encoding;

#ifdef OF_HAVE_FILES
/*!
 * @brief Writes the string into the specified file using UTF-8 encoding.
 *
 * @param path The path of the file to write to
 */
- (void)writeToFile: (OFString *)path;

/*!
 * @brief Writes the string into the specified file using the specified
 *	  encoding.
 *
 * @param path The path of the file to write to
 * @param encoding The encoding to use to write the string into the file
 */
- (void)writeToFile: (OFString *)path
	   encoding: (of_string_encoding_t)encoding;
#endif

/*!
 * @brief Writes the string to the specified URL using UTF-8 encoding.
 *
 * @param URL The URL to write to
 */
- (void)writeToURL: (OFURL *)URL;

/*!
 * @brief Writes the string to the specified URL using the specified encoding.
 *
 * @param URL The URL to write to
 * @param encoding The encoding to use to write the string to the URL
 */
- (void)writeToURL: (OFURL *)URL
	  encoding: (of_string_encoding_t)encoding;

#ifdef OF_HAVE_BLOCKS
/*!
 * Enumerates all lines in the receiver using the specified block.
 *
 * @brief block The block to call for each line
 */
- (void)enumerateLinesUsingBlock: (of_string_line_enumeration_block_t)block;
#endif
@end

#ifdef __cplusplus
extern "C" {
#endif
extern of_string_encoding_t of_string_parse_encoding(OFString *);
extern size_t of_string_utf8_encode(of_unichar_t, char *);
extern ssize_t of_string_utf8_decode(const char *, size_t, of_unichar_t *);
extern size_t of_string_utf16_length(const of_char16_t *);
extern size_t of_string_utf32_length(const of_char32_t *);
#ifdef __cplusplus
}
#endif

OF_ASSUME_NONNULL_END

#import "OFConstantString.h"
#import "OFMutableString.h"
#import "OFString+CryptoHashing.h"
#import "OFString+JSONValue.h"
#import "OFString+Serialization.h"
#import "OFString+URLEncoding.h"
#import "OFString+XMLEscaping.h"
#import "OFString+XMLUnescaping.h"

#if !defined(NSINTEGER_DEFINED) && !__has_feature(modules)
/*
 * Very *ugly* hack required for string boxing literals to work.
 *
 * This hack is needed in order to work with `@class NSString` from Apple's
 * objc/NSString.h - which is included when using modules - as
 * @compatibility_alias does not work if @class has been used before.
 * For some reason, this makes Clang refer to OFString for string box literals
 * and not to NSString (which would result in a linker error, but would be the
 * correct behavior).
 *
 * TODO: Submit a patch for Clang that makes the boxing classes configurable!
 */
@interface NSString: OFString
@end
#endif
