Busy CallBack

Some UUDeview library functions, like scanning of an input file or decoding an output file, can take quite some time. A php script can use a Busy Callback function which is called frequently while a large action is being executed within the library. It is not called when the php script itself has control. The Busy Callback function receives an object corresponding to the C structure uuprogress as unique parameter. This object has the following members :

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