A variable-length sequence of "extended" (UNICODE) characters (16-bit character type). It provides editing operations with built-in memory management to make ExtendedString objects easier to use than ordinary extended character arrays. ExtendedString objects follow "value semantics", that is, they are the actual strings, not handles to strings, and are copied through assignment. You may use HExtendedString objects to get handles to strings. More...

#include <TCollection_ExtendedString.hxx>

Public Member Functions
	TCollection_ExtendedString ()
	Initializes a ExtendedString to an empty ExtendedString. More...

	TCollection_ExtendedString (const Standard_CString astring, const Standard_Boolean isMultiByte=Standard_False)
	Creation by converting a CString to an extended string. If <isMultiByte> is true then the string is treated as having UTF-8 coding. If it is not a UTF-8 then <isMultiByte> is ignored and each character is copied to ExtCharacter. More...

	TCollection_ExtendedString (const Standard_ExtString astring)
	Creation by converting an ExtString to an extended string. More...

	TCollection_ExtendedString (const Standard_WideChar *theStringUtf)
	Initialize from wide-char string considering it as Unicode string (the size of wide char is a platform-dependent - e.g. on Windows wchar_t is UTF-16). More...

	TCollection_ExtendedString (const Standard_Character aChar)
	Initializes a AsciiString with a single character. More...

	TCollection_ExtendedString (const Standard_ExtCharacter aChar)
	Initializes a ExtendedString with a single character. More...

	TCollection_ExtendedString (const Standard_Integer length, const Standard_ExtCharacter filler)
	Initializes a ExtendedString with <length> space allocated. and filled with <filler>.This is useful for buffers. More...

	TCollection_ExtendedString (const Standard_Integer value)
	Initializes an ExtendedString with an integer value. More...

	TCollection_ExtendedString (const Standard_Real value)
	Initializes an ExtendedString with a real value. More...

	TCollection_ExtendedString (const TCollection_ExtendedString &astring)
	Initializes a ExtendedString with another ExtendedString. More...

	TCollection_ExtendedString (const TCollection_AsciiString &astring)
	Creation by converting an Ascii string to an extended string. The string is treated as having UTF-8 coding. If it is not a UTF-8 then each character is copied to ExtCharacter. More...

void	AssignCat (const TCollection_ExtendedString &other)
	Appends the other extended string to this extended string. Note that this method is an alias of operator +=. Example: aString += anotherString. More...

void	operator+= (const TCollection_ExtendedString &other)

TCollection_ExtendedString	Cat (const TCollection_ExtendedString &other) const
	Appends <other> to me. More...

TCollection_ExtendedString	operator+ (const TCollection_ExtendedString &other) const

void	ChangeAll (const Standard_ExtCharacter aChar, const Standard_ExtCharacter NewChar)
	Substitutes all the characters equal to aChar by NewChar in the ExtendedString <me>. The substitution can be case sensitive. If you don't use default case sensitive, no matter wether aChar is uppercase or not. More...

void	Clear ()
	Removes all characters contained in <me>. This produces an empty ExtendedString. More...

void	Copy (const TCollection_ExtendedString &fromwhere)
	Copy <fromwhere> to <me>. Used as operator =. More...

void	operator= (const TCollection_ExtendedString &fromwhere)

	~TCollection_ExtendedString ()
	Frees memory allocated by ExtendedString. More...

void	Insert (const Standard_Integer where, const Standard_ExtCharacter what)
	Insert a Character at position <where>. More...

void	Insert (const Standard_Integer where, const TCollection_ExtendedString &what)
	Insert a ExtendedString at position <where>. More...

Standard_Boolean	IsEmpty () const
	Returns True if this string contains no characters. More...

Standard_Boolean	IsEqual (const Standard_ExtString other) const
	Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==. More...

Standard_Boolean	operator== (const Standard_ExtString other) const

Standard_Boolean	IsEqual (const TCollection_ExtendedString &other) const
	Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==. More...

Standard_Boolean	operator== (const TCollection_ExtendedString &other) const

Standard_Boolean	IsDifferent (const Standard_ExtString other) const
	Returns true if there are differences between the characters in this extended string and the other extended string. Note that this method is an alias of operator !=. More...

Standard_Boolean	operator!= (const Standard_ExtString other) const

Standard_Boolean	IsDifferent (const TCollection_ExtendedString &other) const
	Returns true if there are differences between the characters in this extended string and the other extended string. Note that this method is an alias of operator !=. More...

Standard_Boolean	operator!= (const TCollection_ExtendedString &other) const

Standard_Boolean	IsLess (const Standard_ExtString other) const
	Returns TRUE if <me> is less than <other>. More...

Standard_Boolean	operator< (const Standard_ExtString other) const

Standard_Boolean	IsLess (const TCollection_ExtendedString &other) const
	Returns TRUE if <me> is less than <other>. More...

Standard_Boolean	operator< (const TCollection_ExtendedString &other) const

Standard_Boolean	IsGreater (const Standard_ExtString other) const
	Returns TRUE if <me> is greater than <other>. More...

Standard_Boolean	operator> (const Standard_ExtString other) const

Standard_Boolean	IsGreater (const TCollection_ExtendedString &other) const
	Returns TRUE if <me> is greater than <other>. More...

Standard_Boolean	operator> (const TCollection_ExtendedString &other) const

Standard_Boolean	StartsWith (const TCollection_ExtendedString &theStartString) const
	Determines whether the beginning of this string instance matches the specified string. More...

Standard_Boolean	EndsWith (const TCollection_ExtendedString &theEndString) const
	Determines whether the end of this string instance matches the specified string. More...

Standard_Boolean	IsAscii () const
	Returns True if the ExtendedString contains only "Ascii Range" characters . More...

Standard_Integer	Length () const
	Returns the number of 16-bit code units (might be greater than number of Unicode symbols if string contains surrogate pairs). More...

void	Print (Standard_OStream &astream) const
	Displays <me> . More...

void	RemoveAll (const Standard_ExtCharacter what)
	Removes every <what> characters from <me>. More...

void	Remove (const Standard_Integer where, const Standard_Integer ahowmany=1)
	Erases <ahowmany> characters from position <where>,<where> included. More...

Standard_Integer	Search (const TCollection_ExtendedString &what) const
	Searches a ExtendedString in <me> from the beginning and returns position of first item <what> matching. it returns -1 if not found. More...

Standard_Integer	SearchFromEnd (const TCollection_ExtendedString &what) const
	Searches a ExtendedString in another ExtendedString from the end and returns position of first item <what> matching. it returns -1 if not found. More...

void	SetValue (const Standard_Integer where, const Standard_ExtCharacter what)
	Replaces one character in the ExtendedString at position <where>. If <where> is less than zero or greater than the length of <me> an exception is raised. More...

void	SetValue (const Standard_Integer where, const TCollection_ExtendedString &what)
	Replaces a part of <me> by another ExtendedString see above. More...

TCollection_ExtendedString	Split (const Standard_Integer where)
	Splits this extended string into two sub-strings at position where. More...

TCollection_ExtendedString	Token (const Standard_ExtString separators, const Standard_Integer whichone=1) const
	Extracts <whichone> token from <me>. By default, the <separators> is set to space and tabulation. By default, the token extracted is the first one (whichone = 1). <separators> contains all separators you need. If no token indexed by <whichone> is found, it returns an empty AsciiString. Example: aString contains "This is a message" aString.Token() returns "This" aString.Token(" ",4) returns "message" aString.Token(" ",2) returns "is" aString.Token(" ",9) returns "" Other separators than space character and tabulation are allowed : aString contains "1234; test:message , value" aString.Token("; :,",4) returns "value" aString.Token("; :,",2) returns "test". More...

Standard_ExtString	ToExtString () const
	Returns pointer to ExtString. More...

void	Trunc (const Standard_Integer ahowmany)
	Truncates <me> to <ahowmany> characters. Example: me = "Hello Dolly" -> Trunc(3) -> me = "Hel" Exceptions Standard_OutOfRange if ahowmany is greater than the length of this string. More...

Standard_ExtCharacter	Value (const Standard_Integer where) const
	Returns character at position <where> in <me>. If <where> is less than zero or greater than the lenght of <me>, an exception is raised. Example: aString contains "Hello" aString.Value(2) returns 'e' Exceptions Standard_OutOfRange if where lies outside the bounds of this extended string. More...

Standard_Integer	ToUTF8CString (Standard_PCharacter &theCString) const
	Converts the internal <mystring> to UTF8 coding and returns length of the out CString. A memory for the <theCString> should be allocated before call! More...

Standard_Integer	LengthOfCString () const
	Returns expected CString length in UTF8 coding. It can be used for memory calculation before converting to CString containing symbols in UTF8 coding. More...

Static Public Member Functions
static Standard_Integer	HashCode (const TCollection_ExtendedString &theString, const Standard_Integer theUpper)
	Returns a hashed value for the extended string within the range 1..theUpper. Note: if string is ASCII, the computed value is the same as the value computed with the HashCode function on a TCollection_AsciiString string composed with equivalent ASCII characters. More...

static Standard_Boolean	IsEqual (const TCollection_ExtendedString &theString1, const TCollection_ExtendedString &theString2)
	Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==. More...

Friends
Standard_OStream &	operator<< (Standard_OStream &astream, const TCollection_ExtendedString &astring)

Detailed Description

A variable-length sequence of "extended" (UNICODE) characters (16-bit character type). It provides editing operations with built-in memory management to make ExtendedString objects easier to use than ordinary extended character arrays. ExtendedString objects follow "value semantics", that is, they are the actual strings, not handles to strings, and are copied through assignment. You may use HExtendedString objects to get handles to strings.

Beware that class can transparently store UTF-16 string with surrogate pairs (Unicode symbol represented by two 16-bit code units). However, surrogate pairs are not considered by the following methods:

Method ::Length() return the number of 16-bit code units, not the number of Unicode symbols.
Methods taking/returning symbol index work with 16-bit code units, not true Unicode symbols, including ::Remove(), ::SetValue(), ::Value(), ::Search(), ::Trunc() and others. If application needs to process surrogate pairs, NCollection_Utf16Iter class can be used for iterating through Unicode string (UTF-32 code unit will be returned for each position).

Constructor & Destructor Documentation

TCollection_ExtendedString::TCollection_ExtendedString ( )

Initializes a ExtendedString to an empty ExtendedString.

TCollection_ExtendedString::TCollection_ExtendedString	(	const Standard_CString	astring,
		const Standard_Boolean	isMultiByte = `Standard_False`
	)

Creation by converting a CString to an extended string. If <isMultiByte> is true then the string is treated as having UTF-8 coding. If it is not a UTF-8 then <isMultiByte> is ignored and each character is copied to ExtCharacter.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_ExtString astring )

Creation by converting an ExtString to an extended string.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_WideChar * theStringUtf )

Initialize from wide-char string considering it as Unicode string (the size of wide char is a platform-dependent - e.g. on Windows wchar_t is UTF-16).

This constructor is unavailable if application is built with deprecated msvc option "-Zc:wchar_t-", since OCCT itself is never built with this option.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_Character aChar )

Initializes a AsciiString with a single character.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_ExtCharacter aChar )

Initializes a ExtendedString with a single character.

TCollection_ExtendedString::TCollection_ExtendedString	(	const Standard_Integer	length,
		const Standard_ExtCharacter	filler
	)

Initializes a ExtendedString with <length> space allocated. and filled with <filler>.This is useful for buffers.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_Integer value )

Initializes an ExtendedString with an integer value.

TCollection_ExtendedString::TCollection_ExtendedString ( const Standard_Real value )

Initializes an ExtendedString with a real value.

TCollection_ExtendedString::TCollection_ExtendedString ( const TCollection_ExtendedString & astring )

Initializes a ExtendedString with another ExtendedString.

TCollection_ExtendedString::TCollection_ExtendedString ( const TCollection_AsciiString & astring )

Creation by converting an Ascii string to an extended string. The string is treated as having UTF-8 coding. If it is not a UTF-8 then each character is copied to ExtCharacter.

TCollection_ExtendedString::~TCollection_ExtendedString ( )

Frees memory allocated by ExtendedString.

Member Function Documentation

void TCollection_ExtendedString::AssignCat ( const TCollection_ExtendedString & other )

Appends the other extended string to this extended string. Note that this method is an alias of operator +=. Example: aString += anotherString.

TCollection_ExtendedString TCollection_ExtendedString::Cat ( const TCollection_ExtendedString & other ) const

Appends <other> to me.

void TCollection_ExtendedString::ChangeAll	(	const Standard_ExtCharacter	aChar,
		const Standard_ExtCharacter	NewChar
	)

Substitutes all the characters equal to aChar by NewChar in the ExtendedString <me>. The substitution can be case sensitive. If you don't use default case sensitive, no matter wether aChar is uppercase or not.

void TCollection_ExtendedString::Clear ( )

Removes all characters contained in <me>. This produces an empty ExtendedString.

void TCollection_ExtendedString::Copy ( const TCollection_ExtendedString & fromwhere )

Copy <fromwhere> to <me>. Used as operator =.

Standard_Boolean TCollection_ExtendedString::EndsWith ( const TCollection_ExtendedString & theEndString ) const

Determines whether the end of this string instance matches the specified string.

static Standard_Integer TCollection_ExtendedString::HashCode	(	const TCollection_ExtendedString &	theString,
		const Standard_Integer	theUpper
	)

inlinestatic

Returns a hashed value for the extended string within the range 1..theUpper. Note: if string is ASCII, the computed value is the same as the value computed with the HashCode function on a TCollection_AsciiString string composed with equivalent ASCII characters.

void TCollection_ExtendedString::Insert	(	const Standard_Integer	where,
		const Standard_ExtCharacter	what
	)

Insert a Character at position <where>.

void TCollection_ExtendedString::Insert	(	const Standard_Integer	where,
		const TCollection_ExtendedString &	what
	)

Insert a ExtendedString at position <where>.

Standard_Boolean TCollection_ExtendedString::IsAscii ( ) const

Returns True if the ExtendedString contains only "Ascii Range" characters .

Standard_Boolean TCollection_ExtendedString::IsDifferent ( const Standard_ExtString other ) const

Returns true if there are differences between the characters in this extended string and the other extended string. Note that this method is an alias of operator !=.

Standard_Boolean TCollection_ExtendedString::IsDifferent ( const TCollection_ExtendedString & other ) const

Returns true if there are differences between the characters in this extended string and the other extended string. Note that this method is an alias of operator !=.

Standard_Boolean TCollection_ExtendedString::IsEmpty ( ) const

inline

Returns True if this string contains no characters.

Standard_Boolean TCollection_ExtendedString::IsEqual ( const Standard_ExtString other ) const

Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==.

Standard_Boolean TCollection_ExtendedString::IsEqual ( const TCollection_ExtendedString & other ) const

Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==.

static Standard_Boolean TCollection_ExtendedString::IsEqual	(	const TCollection_ExtendedString &	theString1,
		const TCollection_ExtendedString &	theString2
	)

inlinestatic

Returns true if the characters in this extended string are identical to the characters in the other extended string. Note that this method is an alias of operator ==.

Standard_Boolean TCollection_ExtendedString::IsGreater ( const Standard_ExtString other ) const

Returns TRUE if <me> is greater than <other>.

Standard_Boolean TCollection_ExtendedString::IsGreater ( const TCollection_ExtendedString & other ) const

Returns TRUE if <me> is greater than <other>.

Standard_Boolean TCollection_ExtendedString::IsLess ( const Standard_ExtString other ) const

Returns TRUE if <me> is less than <other>.

Standard_Boolean TCollection_ExtendedString::IsLess ( const TCollection_ExtendedString & other ) const

Returns TRUE if <me> is less than <other>.

Standard_Integer TCollection_ExtendedString::Length ( ) const

Returns the number of 16-bit code units (might be greater than number of Unicode symbols if string contains surrogate pairs).

Standard_Integer TCollection_ExtendedString::LengthOfCString ( ) const

Returns expected CString length in UTF8 coding. It can be used for memory calculation before converting to CString containing symbols in UTF8 coding.

Standard_Boolean TCollection_ExtendedString::operator!= ( const Standard_ExtString other ) const

inline

Standard_Boolean TCollection_ExtendedString::operator!= ( const TCollection_ExtendedString & other ) const

inline

TCollection_ExtendedString TCollection_ExtendedString::operator+ ( const TCollection_ExtendedString & other ) const

inline

void TCollection_ExtendedString::operator+= ( const TCollection_ExtendedString & other )

inline

Standard_Boolean TCollection_ExtendedString::operator< ( const Standard_ExtString other ) const

inline

Standard_Boolean TCollection_ExtendedString::operator< ( const TCollection_ExtendedString & other ) const

inline

void TCollection_ExtendedString::operator= ( const TCollection_ExtendedString & fromwhere )

inline

Standard_Boolean TCollection_ExtendedString::operator== ( const Standard_ExtString other ) const

inline

Standard_Boolean TCollection_ExtendedString::operator== ( const TCollection_ExtendedString & other ) const

inline

Standard_Boolean TCollection_ExtendedString::operator> ( const Standard_ExtString other ) const

inline

Standard_Boolean TCollection_ExtendedString::operator> ( const TCollection_ExtendedString & other ) const

inline

void TCollection_ExtendedString::Print ( Standard_OStream & astream ) const

Displays <me> .

void TCollection_ExtendedString::Remove	(	const Standard_Integer	where,
		const Standard_Integer	ahowmany = `1`
	)

Erases <ahowmany> characters from position <where>,<where> included.

void TCollection_ExtendedString::RemoveAll ( const Standard_ExtCharacter what )

Removes every <what> characters from <me>.

Standard_Integer TCollection_ExtendedString::Search ( const TCollection_ExtendedString & what ) const

Searches a ExtendedString in <me> from the beginning and returns position of first item <what> matching. it returns -1 if not found.

Standard_Integer TCollection_ExtendedString::SearchFromEnd ( const TCollection_ExtendedString & what ) const

Searches a ExtendedString in another ExtendedString from the end and returns position of first item <what> matching. it returns -1 if not found.

void TCollection_ExtendedString::SetValue	(	const Standard_Integer	where,
		const Standard_ExtCharacter	what
	)

Replaces one character in the ExtendedString at position <where>. If <where> is less than zero or greater than the length of <me> an exception is raised.

void TCollection_ExtendedString::SetValue	(	const Standard_Integer	where,
		const TCollection_ExtendedString &	what
	)

Replaces a part of <me> by another ExtendedString see above.

TCollection_ExtendedString TCollection_ExtendedString::Split ( const Standard_Integer where )

Splits this extended string into two sub-strings at position where.

The second sub-string (from position where + 1 of this string to the end) is returned in a new extended string.
this extended string is modified: its last characters are removed, it becomes equal to the first sub-string (from the first character to position where). Example: aString contains "abcdefg" aString.Split(3) gives <me> = "abc" and returns "defg"

Standard_Boolean TCollection_ExtendedString::StartsWith ( const TCollection_ExtendedString & theStartString ) const

Determines whether the beginning of this string instance matches the specified string.

Standard_ExtString TCollection_ExtendedString::ToExtString ( ) const

Returns pointer to ExtString.

TCollection_ExtendedString TCollection_ExtendedString::Token	(	const Standard_ExtString	separators,
		const Standard_Integer	whichone = `1`
	)		const

Extracts <whichone> token from <me>. By default, the <separators> is set to space and tabulation. By default, the token extracted is the first one (whichone = 1). <separators> contains all separators you need. If no token indexed by <whichone> is found, it returns an empty AsciiString. Example: aString contains "This is a message" aString.Token() returns "This" aString.Token(" ",4) returns "message" aString.Token(" ",2) returns "is" aString.Token(" ",9) returns "" Other separators than space character and tabulation are allowed : aString contains "1234; test:message , value" aString.Token("; :,",4) returns "value" aString.Token("; :,",2) returns "test".

Standard_Integer TCollection_ExtendedString::ToUTF8CString ( Standard_PCharacter & theCString ) const

Converts the internal <mystring> to UTF8 coding and returns length of the out CString. A memory for the <theCString> should be allocated before call!

void TCollection_ExtendedString::Trunc ( const Standard_Integer ahowmany )

Truncates <me> to <ahowmany> characters. Example: me = "Hello Dolly" -> Trunc(3) -> me = "Hel" Exceptions Standard_OutOfRange if ahowmany is greater than the length of this string.

Standard_ExtCharacter TCollection_ExtendedString::Value ( const Standard_Integer where ) const

Returns character at position <where> in <me>. If <where> is less than zero or greater than the lenght of <me>, an exception is raised. Example: aString contains "Hello" aString.Value(2) returns 'e' Exceptions Standard_OutOfRange if where lies outside the bounds of this extended string.

Friends And Related Function Documentation

Standard_OStream& operator<<	(	Standard_OStream &	astream,
		const TCollection_ExtendedString &	astring
	)

friend

The documentation for this class was generated from the following file:

TCollection_ExtendedString.hxx

Public Member Functions

Static Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation