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_doscan
=======

Syntax
------

     #include <stdio.h>
     
     int _doscan(FILE *file, const char *format, void **ptrs_to_args);

Description
-----------

This is an internal function that is used by all the `scanf' style
functions, which simply pass their format, arguments, and stream to this
function.

scanf: for a discussion of the allowed formats and arguments.   

Return Value
------------

The number of characters successfully scanned is returned, or -1 on
error.

Example
-------

     int x, y;
     int *args[2];
     args[0] = &x;
     args[1] = &y;
     _doscan(stdin, "%d %d", args);