Hi, I have been doing some testing with this lib, the math is fascinating, though still wrapping my head around that part.
So I have been running this on some large vmdk files and ISO images and I have noticed that the cut (3rd col below) has a lot of chunks that are all zeros, but others are not. I am trying to work out why this is happening for my own knowledge and if this is a concern / bug or not? My math skills are a bit lacking here :(
start, length, cut, data sha256 0,524288,0000000000000000,28e4a81308369bd0aff1d2b22d892d04ce4a527f550377359459d3948d32d63d 524288,524288,0000000000000000,2a640f73aa78eb8763a5f018a087bd05d3736abd4986cc3e31aefb811cc94f37 1048576,973787,0000000000000000,edb77219e672dac7ce1672144d6a9ec53e7816b8eb4e5445a0774453850c49f4 2022363,524288,0000000000000000,782d745c64635fecdbb1135900d19291f509db504cc2da10e9a3da085be1f6df 2546651,524288,0000000000000000,ea3f4607a9d118329a9ffd559cb66028dc82b2ad29d56743f74231ef301d6583 3070939,524288,0000000000000000,79f64ccd636ba4cc30961138568580e30c39d16df72802fef651c721f1ae12e1 3595227,524288,0000000000000000,c31af1a65702f7c8c12b4dab3a89f67491a71e66ab072e1ff94cd2b2db2877c6 4119515,855180,0000000000000000,deee3fe183d9f6071aa2444a600d64083ff6877d1dd411ee016272a211d77bb0 4974695,1323860,0000000000000000,0e649631dad8491040858e846f9c89e3d00f8140cd196f2a0f501f5e94340789 6298555,524288,0000000000000000,c23d7b73fceba5bb05ce9940824a0e510b61a458a1a913bb27874232ffcf2aaf 6822843,849545,0000000000000000,dbf2962a6667e3d3f61bb8f192a29f2f9b1f2bc45fb82d1d919c527e5bbd15d5 7672388,1590272,0000000000000000,976f3baa39e9cc717c64820758ff1b9cfa902174671368c80cb77fcf3f5fdaa8 9262660,551276,0000000000000000,b8c560f3e8a0fc7540b7f993b5fdee2fddefc81969d410ac43025556a068e4c0 9813936,756302,001c2d1b34300000,ee095546549e7bac07e0a6bb66ab6e2e5298b4ec666c7d6b4edec86883a3e61e 10570238,573630,0000000000000000,fd3b486ab38e1099d3e99fa1911c8d6ffe5f8629bf8a69170104eeee33e5535c 11143868,591063,0000000000000000,e67d05dc0c87d1c93e252906816e734af542e226f9acfed920b2d95340d8b336 11734931,703008,0000000000000000,ef183eb9d66c97bfdb3fe0c447f19a8dbbce3b1d2907fe4d852a1a1815ebedf2 12437939,1735045,0000000000000000,a4e6953b704c6f135927637718027f2040112ae7c658ec336034d85c75af03e5 14172984,525899,0000000000000000,876e510585e0393cef81321e76e1a0f0c54734021bdaff7b20e3d02c7866d042 14698883,1160820,001c2bf278400000,fa594805c673c8383c5ad2abbf60f4a3bb82d0b48e2cc3eaea9611aca1f3e472 15859703,1379366,001db4ebf3900000,693a599241e0f1be475ccc3e38e5a9a7621a9b506d6e516baddb06f0af65232c 17239069,755131,001f8ba7d6600000,e856655192cde5781af5c56c62021b11657dff40f91083543f8c984130dc25c8 17994200,784832,0000000000000000,c53fac497eee05cd11553eb6abdfcd30f3d7cf183b5902ccf2d2f8f0939f46d8 18779032,524288,0000000000000000,8e813549020533c276d4e9be59355823c63284b1f278b64bb7a886e222e02378 19303320,602703,0000000000000000,c2140a64fa266b6356ba9bd6d301693eeebc5de7e909649c79eb8adf6b52d118 19906023,2779791,0000000000000000,377a1ad55e145fda2e69a19bc257af94f8f5168b127ed3be04aef915fd8faed1 22685814,2922869,001492e64e500000,8a8e2434db0d92faa88f529b26d6b0833934a93bc2109033ccc159ed7906ce62 25608683,693701,00113c4e0e000000,1c2ceb34bd22b29f9ff41be422a45d1fc154f4395652573179191849aad2c363 26302384,3420819,0010535a1d700000,29255b8d98898367443bf78e6ce66dedad7029a99f98b78458ef4caf32d7a577 29723203,1284896,0014b881b9700000,72cee412d6834390ff399f8764a5303b027ec560a874392d6cc0d51078c02564 31008099,1110826,0000000000000000,ac95d0772821cefcb3239057a53f359e04dc4793f5d08966c02aea31edfbd059 32118925,610052,001efe9c6ab00000,35b9061f17f6b1dd7382c93ba09dda25754afe8c3efe9f75e8b129bb580a504c 32728977,846558,00137eaa57f00000,5b002379337bd9c2595c93b4ac31ca42d77771aff85537f1943a209717b94a8b 33575535,6596661,0017c23658500000,93997224daeb73b02b2b8057ba586215fd6d3b180fbd723d88ea68ccae041e07 40172196,6895050,0011b6238d400000,6d36ebd9c1752354302f842b582b9b43e6c7eb8a9655b94315d3c260f3865bcc 47067246,2451102,0011c0316b400000,ff48b61821fe0d080fd5773b750046e38f26080743f32159b5cff289d825e464 49518348,1176209,000d3a5ef8700000,1b98059a6e92c211d81c06fea94c4cef47a6bfa37d340cd9b6e8ec66eebf3243 50694557,1234094,0008694076a00000,39989fc8ff08be64145d5e10a76f68f584474beca88093f59b01928a6ca3321a 51928651,998650,0019243585f00000,deb1ec69aa141e99c36305d952d4a5e381a5624577fd99dde29e292c3c48555f 52927301,2345517,001122cb64200000,4f6f365964fd3eb05cddf44af9bb21bb31c5008daae480515a3f85c9bacd445f 55272818,1468224,0008dabb19c00000,dd47b820ca2050a59de86a3061937e14b6921b37c90be1d2629c7f0d54bafd40 56741042,907787,000b95f594b00000,471c967a00a920485796fd59bd3fd16c964447f8459b99a7e82082f15d5b3919 57648829,903786,001a881f2b800000,6ec5226f65a75bbc116ef7dd57b9cc41ee8f9a829bf8caacb60784ffe8afb4c7 58552615,795319,000168f791400000,f877afc68cbce724e7cd64cfce510247c4955722b3890b48f2e77b6798f0a0d9 59347934,814157,0000ee44cd000000,edd8f812e62a5b158e12f764a3badca102d14fead26d7a7f2744d459c36f0a33 60162091,828363,000b295ed8b00000,2415db6814c57132d5876ed6b777f180f876567441353acfc2ff5c74dc180651 60990454,4107954,0006d096f0d00000,747716c0359a140118021c3b70c3e0e838c479ceaf5b90b5eeda64771438ba24 65098408,1290395,000e4f8da4a00000,57da0dbf272590726b9044bcc343662091ea452d4283cff489d166ffb1d38bdf 66388803,1021273,001d60c1b9d00000,1df47d9d5e8300deda94afc2612a90a4c98f2419d227b904965fc5da7fa01103 67410076,3309847,000053cff2d00000,424b5980be4fbb9ea8cca575ec770d12d49abbea1d96ce2dfa564ebd523b894d 70719923,661376,000ec23dc6d00000,cdd8d62d86788583ed574ab7f5f5cc0266de0ae44b88bedc69d2724af1e78cfe 71381299,2045453,0018315fd2d00000,ab6565f4b5c1bbcd584a46a161c7e56fbc56deed47a3211045acc89a9a8608b2 73426752,1410403,000a31abbed00000,992eb5bfe672aa456a16653d477065ef151501673502a13df09a928425bce748 74837155,867156,000aa5c0d4f00000,5a2edaf327288d74d52b78ec6799151512526892447b84ef5a16ce75ec6eba4f 75704311,819145,000b998b42500000,7457294c6f18b247c20126dbd0fd8a5969fb6c9640fd63d054d4ddd54cae7aa1 76523456,681149,000eaec51c000000,81932fa073682d3d7cc164624f51d788168d4205102ab1e8e7571b608cfcbc8c