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CentOS 7.0 - man page for xwclookupstring (centos section 3)

XmbLookupString(3)			  XLIB FUNCTIONS		       XmbLookupString(3)

       XmbLookupString, XwcLookupString, Xutf8LookupString - obtain composed input from an input

       int XmbLookupString(XIC ic, XKeyPressedEvent *event, char *buffer_return, int bytes_buf-
	      fer, KeySym *keysym_return, Status *status_return);

       int XwcLookupString(XIC ic, XKeyPressedEvent *event, wchar_t *buffer_return, int
	      wchars_buffer, KeySym *keysym_return, Status *status_return);

       int Xutf8LookupString(XIC ic, XKeyPressedEvent *event, char *buffer_return, int bytes_buf-
	      fer, KeySym *keysym_return, Status *status_return);

		 Returns a multibyte string or wide character string (if any) from the input

		 Specifies space available in the return buffer.

       event	 Specifies the key event to be used.

       ic	 Specifies the input context.

		 Returns the KeySym computed from the event if this argument is not NULL.

		 Returns a value indicating what kind of data is returned.

       The XmbLookupString, XwcLookupString and Xutf8LookupString functions return the string
       from the input method specified in the buffer_return argument.  If no string is returned,
       the buffer_return argument is unchanged.

       The KeySym into which the KeyCode from the event was mapped is returned in the
       keysym_return argument if it is non-NULL and the status_return argument indicates that a
       KeySym was returned.  If both a string and a KeySym are returned, the KeySym value does
       not necessarily correspond to the string returned.

       XmbLookupString and Xutf8LookupString return the length of the string in bytes, and
       XwcLookupString returns the length of the string in characters.	Both XmbLookupString and
       XwcLookupString return text in the encoding of the locale bound to the input method of the
       specified input context, and Xutf8LookupString returns text in UTF-8 encoding.

       Each string returned by XmbLookupString and XwcLookupString begins in the initial state of
       the encoding of the locale (if the encoding of the locale is state-dependent).

       Note: To ensure proper input processing, it is essential that the client pass only Key-
       Press events to XmbLookupString, XwcLookupString and Xutf8LookupString.	Their behavior
       when a client passes a KeyRelease event is undefined.

       Clients should check the status_return argument before using the other returned values.
       These three functions each return a value to status_return that indicates what has been
       returned in the other arguments.  The possible values returned are:

       XBufferOverflow	 The input string to be returned is too
			 large for the supplied buffer_return.	The
			 required size (for XmbLookupString,
			 Xutf8LookupString in bytes; for XwcLookup-
			 String in characters) is returned as the
			 value of the function, and the contents of
			 buffer_return and keysym_return are not
			 modified.  The client should recall the
			 function with the same event and a buffer
			 of adequate size to obtain the string.
       XLookupNone	 No consistent input has been composed so
			 far.  The contents of buffer_return and
			 keysym_return are not modified, and the
			 function returns zero.
       XLookupChars	 Some input characters have been composed.
			 They are placed in the buffer_return argu-
			 ment, using the encoding described above,
			 and the string length is returned as the
			 value of the function.  The content of the
			 keysym_return argument is not modified.
       XLookupKeySym	 A KeySym has been returned instead of a
			 string and is returned in keysym_return.
			 The content of the buffer_return argument
			 is not modified, and the function returns
       XLookupBoth	 Both a KeySym and a string are returned;
			 XLookupChars and XLookupKeySym occur simul-

       It does not make any difference if the input context passed as an argument to XmbLookup-
       String, XwcLookupString and Xutf8LookupString is the one currently in possession of the
       focus or not.  Input may have been composed within an input context before it lost the
       focus, and that input may be returned on subsequent calls to XmbLookupString, XwcLookup-
       String or Xutf8LookupString even though it does not have any more keyboard focus.

       The function Xutf8LookupString is an extension introduced by The XFree86 Project, Inc. in
       their 4.0.2 release. Its presence is indicated by the macro X_HAVE_UTF8_STRING.

       XLookupKeysym(3), Compose(5)
       Xlib - C Language X Interface

X Version 11				   libX11 1.6.0 		       XmbLookupString(3)

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