Date: Thu, 15 Jul 2010 15:43:58 -0700 From: Xin LI <delphij@delphij.net> To: "deeptech71@gmail.com" <deeptech71@gmail.com> Cc: freebsd-chat@freebsd.org Subject: Re: is strlen()'s read-4-bytes-ahead a standard? Message-ID: <4C3F8F2E.9080705@delphij.net> In-Reply-To: <AANLkTima5e5pXRrLkOP-3vzHrXWawhDOyP25xgHBPqw_@mail.gmail.com> References: <AANLkTima5e5pXRrLkOP-3vzHrXWawhDOyP25xgHBPqw_@mail.gmail.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2010/07/15 15:38, deeptech71@gmail.com wrote: > Some C implementations use the read-4-bytes-ahead technique to speed > up strlen(). Does the C standard state anything about strlen() being > allowed to read past the terminating zero? It's not 4-bytes-ahead, but read a whole (aligned) word at one time. I think C standard does not dictate in this detail. But why? Cheers, - -- Xin LI <delphij@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (FreeBSD) iQEcBAEBCAAGBQJMP48tAAoJEATO+BI/yjfBBNwIAJrqtefoZJ90095Aurk5H9kv SQZ8wVO1vgFu4qN2yT8InuXtpCB9Q6onuFQmMphdQrbqJWIDb+lxCD8UZUp6ocZE 544RPI9kLwWfUwQ0WdrTNmdAHGIbqc6nrhlS3IwTn82NCjuFH5pEpUmt0r53b19I jy/FlJjjTSiSC32tODLa922mo1GB50CA3fFlgUVlB7PHLRvdLeE6JsmvRA89gfRi /TOIRP8X/tJeDE4yuDycRmMCvOI+hFHdFchMxYQG2bifo1aZQzny+iNRA0xvYpO7 oZble3Cgwfs+jj2RkGW/syOXtvYA1CTxAJ67vf4OCX5Facq+Yfi3pto7xbIJCKE= =rxAG -----END PGP SIGNATURE-----
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