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Syntax:
read-byte stream &optional eof-error-p eof-value => byte
Arguments and Values:
stream---a binary input stream.
eof-error-p---a generalized boolean. The default is true.
eof-value---an object. The default is nil.
byte---an integer, or the eof-value.
Description:
read-byte reads and returns one byte from stream.
If an end of file[2] occurs and eof-error-p is false, the eof-value is returned.
Examples:
 (with-open-file (s "temp-bytes" 
                     :direction :output
                     :element-type 'unsigned-byte)
    (write-byte 101 s)) =>  101
 (with-open-file (s "temp-bytes" :element-type 'unsigned-byte)
    (format t "~S ~S" (read-byte s) (read-byte s nil 'eof)))
>>  101 EOF
=>  NIL
 
Side Effects:
Modifies stream.
Affected By: None.
Exceptional Situations:
Should signal an error of type type-error if stream is not a stream.
Should signal an error of type error if stream is not a binary input stream.
If there are no bytes remaining in the stream and eof-error-p is true, an error of type end-of-file is signaled.
See Also:
read-char, read-sequence, write-byte
Notes: None.
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