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([2001:8a0:6cc5:7e01:9a40:bbff:fe12:c8fd]) by smtp.gmail.com with ESMTPSA id j10-20020a05600c42ca00b003942a244ec9sm960671wme.14.2022.05.12.16.50.01 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 May 2022 16:50:02 -0700 (PDT) Message-ID: <64f88438-2cf5-0920-972f-ccf1eb320d07@gmail.com> Date: Fri, 13 May 2022 00:50:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0 Content-Language: en-US To: linux-kernel@vger.kernel.org From: =?UTF-8?Q?Andr=c3=a9_Coelho?= Subject: compress Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RDNS_NONE, SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey, since all numbers are bits, for example a int is 32 bits, can't we use a math function to convert from bigger numbers to small numbers? for example     int a= 0xaabbccdd f(a) = 0xff we could only store 0xff and for obtaining the a again, just use the inverse function...the function has to be bijective though f-a(0xff) = 0xaabbccdd thanks later andre coelho