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<HTML><HEAD><TITLE>Xlib Programming Manual: Extensions: XESetWireToError</TITLE></HEAD><BODY><H1 ALIGN=center>XESetWireToError</H1><H2>Syntax</H2><!.IN "XESetWireToError" "" "@DEF@"><CODE><PRE>Bool (*XESetWireToError(<B>display</B>, <B>error_number</B>, <B>proc</B>)() Display *<B>display</B>; int <B>error_number</B>; Bool (*<B>proc</B>)();</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>error_number</B><TD> Specifies the error code.<TR><TD> <B>proc</B><TD> Specifies the procedure to call when an error is received.</TABLE><H2>Description</H2>The<B>XESetWireToError()</B>function defines a procedure to be called when an extensionerror needs to be converted from wire format to host format.The error number defines which protocol error code to installthe conversion procedure for.<B>XESetWireToError()</B>returns any previously defined procedure.<P>Use this function for extension errors that contain additional error valuesbeyond those in a core X error, when multiple wire errors must be combinedinto a single Xlib error, or when it is necessary to intercept anX error before it is otherwise examined.<P>When Xlib needs to convert an error from wire format to host format,the procedure is called with these arguments:<P><PRE><CODE>Bool (*<B>proc</B>)(<B>display</B>, <B>he</B>, <B>we</B>) <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; <A HREF="../../event-handling/protocol-errors/default-handlers.html#XErrorEvent">XErrorEvent</A> *<B>he</B>; xError *<B>we</B>;</PRE></CODE><P>The <B>he</B> argument is a pointer to where the host format error should be stored.The structure pointed at by he is guaranteed to be as large as an<A HREF="../../events/structures.html#XEvent">XEvent</A>structure and so can be cast to a type larger than an<A HREF="../../event-handling/protocol-errors/default-handlers.html#XErrorEvent">XErrorEvent</A>to store additional values.If the error is to be completely ignored by Xlib(for example, several protocol error structures will be combined intoone Xlib error),then the function should return<B>False</B>;otherwise, it should return<B>True</B>.<H2>See also</H2><B><A HREF="XESetBeforeFlush.html">XESetBeforeFlush()</A></B>,<B><A HREF="XESetCloseDisplay.html">XESetCloseDisplay()</A></B>,<B><A HREF="XESetCopyGC.html">XESetCopyGC()</A></B>,<B><A HREF="XESetCreateFont.html">XESetCreateFont()</A></B>,<B><A HREF="XESetCreateGC.html">XESetCreateGC()</A></B>,<B><A HREF="XESetError.html">XESetError()</A></B>,<B><A HREF="XESetErrorString.html">XESetErrorString()</A></B>,<B><A HREF="XESetEventToWire.html">XESetEventToWire()</A></B>,<B><A HREF="XESetFlushGC.html">XESetFlushGC()</A></B>,<B><A HREF="XESetFreeFont.html">XESetFreeFont()</A></B>,<B><A HREF="XESetFreeGC.html">XESetFreeGC()</A></B>,<B><A HREF="XESetPrintErrorValues.html">XESetPrintErrorValues()</A></B>,<B><A HREF="XESetWireToEvent.html">XESetWireToEvent()</A></B>,<B><A HREF="_XSetLastRequestRead.html">_XSetLastRequestRead()</A></B>,"<A HREF="hooks-into-the-library.html">Hooks into the Library</A>"<HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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