NAME
        FGets -- Reads a line from the specified input (buffered) (V36)

   SYNOPSIS
        buffer = FGets(fh, buf, len)
        D0             D1  D2   D3

        strptr fgets(bptr, strptr, ulong)

   FUNCTION
        This routine reads in a single line from the specified input stopping
        at a NEWLINE character or EOF.  In either event, UP TO the number of
        len specified bytes minus 1 will be copied into the buffer.  Hence if
        a length of 50 is passed and the input line is longer than 49 bytes,
        it will return 49 characters.  It returns the buffer pointer normally,
        or NULL if EOF is the first thing read.

        If terminated by a newline, the newline WILL be the last character in
        the buffer.  This is a buffered read routine.  The string read in IS
        null-terminated.

   INPUTS
        fh  - filehandle to use for buffered I/O
        buf - Area to read bytes into.
        len - Number of bytes to read, must be > 0.

   RESULT
        buffer - Pointer to buffer passed in, or NULL for immediate EOF or for
                 an error.  If NULL is returnd for an EOF, ioerr() will return
                 0.

   BUGS
        In V36 and V37, it copies one more byte than it should if it doesn't
        hit an EOF or newline.  In the example above, it would copy 50 bytes
        and put a null in the 51st.  This is fixed in dos V39.  Workaround
        for V36/V37: pass in buffersize-1.

   SEE ALSO
        fread(), fputs(), fgetc()