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243
((info)->read_pos++, (int) (unsigned char) (info)->read_pos[-1]) :\
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(_my_b_write(info,0,0) , ((*(info)->write_pos++)=(chr))))
252
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#define my_b_fill_cache(info) \
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(((info)->read_end=(info)->read_pos),(*(info)->read_function)(info,0,0))