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

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XtConvert(3)			    XT COMPATIBILITY FUNCTIONS			     XtConvert(3)

       XtConvert, XtDirectConvert - invoke resource converters

       void XtConvert(Widget w, String from_type, XrmValuePtr from, String to_type, XrmValuePtr

       void XtDirectConvert(XtConverter converter, XrmValuePtr args, Cardinal num_args, XrmVal-
	      uePtr from, XrmValuePtr to_return);

       args	 Specifies the argument list that contains the additional arguments needed to
		 perform the conversion (often NULL).

       converter Specifies the conversion procedure that is to be called.

       from	 Specifies the value to be converted.

       from_type Specifies the source type.

       num_args  Specifies the number of additional arguments (often zero).

       to_type	 Specifies the destination type.

       to_return Returns the converted value.

       w	 Specifies the widget to use for additional arguments (if any are needed).

       The XtConvert function looks up the type converter registered to convert from_type to
       to_type, computes any additional arguments needed, and then calls XtDirectConvert.  XtCon-
       vert has been replaced by XtConvertAndStore.

       The XtDirectConvert function looks in the converter cache to see if this conversion proce-
       dure has been called with the specified arguments.  If so, it returns a descriptor for
       information stored in the cache; otherwise, it calls the converter and enters the result
       in the cache.

       Before calling the specified converter, XtDirectConvert sets the return value size to zero
       and the return value address to NULL.  To determine if the conversion was successful, the
       client should check to_return.address for non-NULL.  XtDirectConvert has been replaced by

       XtAppAddConverter(3), XtStringConversionWarning(3), XtConvertAndStore(3), XtCallCon-
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

X Version 11				   libXt 1.1.4				     XtConvert(3)
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