def test_deflate_set_dictionary(): text = 'abcabc' zdict = 'abc' stream = rzlib.deflateInit() rzlib.deflateSetDictionary(stream, zdict) bytes = rzlib.compress(stream, text, rzlib.Z_FINISH) rzlib.deflateEnd(stream) stream2 = rzlib.inflateInit() from rpython.rtyper.lltypesystem import lltype, rffi, rstr from rpython.rtyper.annlowlevel import llstr from rpython.rlib.rstring import StringBuilder with lltype.scoped_alloc(rffi.CCHARP.TO, len(bytes)) as inbuf: rstr.copy_string_to_raw(llstr(bytes), inbuf, 0, len(bytes)) stream2.c_next_in = rffi.cast(rzlib.Bytefp, inbuf) rffi.setintfield(stream2, 'c_avail_in', len(bytes)) with lltype.scoped_alloc(rffi.CCHARP.TO, 100) as outbuf: stream2.c_next_out = rffi.cast(rzlib.Bytefp, outbuf) bufsize = 100 rffi.setintfield(stream2, 'c_avail_out', bufsize) err = rzlib._inflate(stream2, rzlib.Z_SYNC_FLUSH) assert err == rzlib.Z_NEED_DICT rzlib.inflateSetDictionary(stream2, zdict) rzlib._inflate(stream2, rzlib.Z_SYNC_FLUSH) avail_out = rffi.cast(lltype.Signed, stream2.c_avail_out) result = StringBuilder() result.append_charpsize(outbuf, bufsize - avail_out) rzlib.inflateEnd(stream2) assert result.build() == text