NAME

XtConvert, XtDirectConvert - invoke resource converters

SYNTAX

void XtConvert(w, from_type, from, to_type, to_return)
    Widget w;
    String from_type;
    XrmValuePtr from;
    String to_type;
    XrmValuePtr to_return;

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

ARGUMENTS

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 argu-
          ments (if any are needed).

DESCRIPTION

     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.

     The XtDirectConvert function looks in the converter cache to
     see if this conversion procedure 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.

XWIN 3.0               Last change: 9/1/88                 .ie t

     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.

SEE ALSO

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

XWIN 3.0               Last change: 9/1/88                 .ie t

XWIN 3.0               Last change: 9/1/88                 .ie t