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[180.214.232.83]) by smtp.gmail.com with ESMTPSA id h11-20020a056a00218b00b0063b8ada8777sm2916689pfi.112.2023.04.21.05.21.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 21 Apr 2023 05:21:38 -0700 (PDT) Message-ID: Date: Fri, 21 Apr 2023 19:21:36 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: strings Content-Language: en-US To: Willy Tarreau Cc: =?UTF-8?Q?Andr=c3=a9_Coelho?= , linux-kernel@vger.kernel.org References: <8de1912e-8009-3c85-ece5-7ca7f03be42a@gmail.com> From: Bagas Sanjaya In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,NICE_REPLY_A, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham 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 On 4/21/23 13:34, Willy Tarreau wrote: >> Looks like above link is about hex arithmetic implemented using strings, >> right? > > It looks more like a reinvention of the classical multi-byte string > processing (memcmp, memcpy, memmove etc). > >> Also, on what use cases can your idea fit the kernel context? Or doesn't the >> kernel already have the implementation yet? > > Sure it does, look at __crypto_memneq() for example, or more generally > at any memcmp() or memcpy() implementation from the last 30 years, for > example in glibc. > Thanks for explanation! I don't have any serious C[++] programming background, so I was confused when I wrote the original reply. -- An old man doll... just what I always wanted! - Clara