Release note of version 1.3.1.9

To download MultiPar package, click "Releases" item on the right panel.

How to download files.txt

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+ By clicking "Releases" item on the right panel, you will see every version.
+You may download your favorite MultiPar package at "Assets" item.

README.md

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 # MultiPar
 
-v1.3.1.5 is public
+v1.3.1.9 is public
 
- This version has some trial functions. 
-I fixed some problems of previous versions. 
-Though I tested the behavior on my PC, 
-there may be a bug in other environments or in a rare case. 
-Be careful to use this version for daily usage. 
-When you want a stable version, 
-you should not use this new one until other users try. 
-Unless you have a problem, v1.3.0.7 or v1.3.1.3 might be safe. 
-If you see a strange behavior, odd problem, or failure, 
-please report the incident to me. 
-I will fix as possible as I can. 
+  This is the final release of v1.3.1 tree. 
+There would be no serious problem. 
+While I fixed some rare bugs and improved a bit, it's hard to test all possible cases. 
+When you see a bug, odd incident, or strange behavior, please let me know. 
+I will fix as possible as I can.
 
- I increased max block size from 1 GB (old versions) to 2 GB (new version). 
-This change is for rare case. 
-Normally users should not set so large block size in most case. 
-For compatibility, setting less than 100,000,000 bytes = 95 MB is good. 
-Be careful, MultiPar cannot treat too large block size properly. 
-When you have a set of PAR2 files with more than 2 GB block size (such like 4 GB), 
-par2cmdline may support them. 
-I adjusted some GUI components for big numbers. 
-If you see something bad in your language UI, please let me know. 
+  I tested verification of multiple source files on my new PC. 
+From the result, I set max number of threads for NVMe SSD to 4 threads, 
+when CPU has 6 or more logical cores. 
+This will improve speed at verifying complete source files. 
+(It doesn't affect for PAR files nor damaged files.)  
+SATA SSD : It will verify max 2 files at once.  
+NVMe SSD : It will verify max 3 or 4 files at once.
 
- I implemented a function to calculate MD5 hash of multiple files at verifying source files. 
-It seems to be faster on SSD. (I cannot test the speed by myself.) 
-But, it is slow on HDD. 
-It detects your drive type and switches function automatically. 
-If it fails and happens to be slow on your PC, 
-please report your case. 
-Because I don't know SSD's property so much, I will need help of users. 
-Thanks John L. Galt for tests and bug report on SSD. 
+  When many input file slices are same, their checksums become same, too. 
+There was a bug in my sorting function. 
+Nobody found the error for over than 10 years, and I solved this problem at last. 
+Thanks [NilEinne](https://github.com/Yutaka-Sawada/MultiPar/issues/36) for reporting the very rare incident.
 
- There was a bug in v1.3.1.4, and created PAR2 files happened to contain broken packets. 
-MD5 hash of some packets were wrong. 
-When a file size was multiple of block size, the problem occurred. 
-Such PAR2 files are shown as damaged on MultiPar verification, 
-and v1.3.1.4 could not verify source files without checksum packets. 
-I fixed the bug in v1.3.1.5, and it can verify source files now. 
-Though it's possible to use such broken PAR2 files (created by v1.3.1.4), 
-you would better recreate new PAR2 files with this new version. 
-I'm sorry for the inconvenience. 
-Thanks nutpantz for this bug report. 
+  When a file includes duplicated data, it's difficult to find slices in proper position. 
+In old versions, it might ignore overlap of slices for speed. 
+Then, it happend to fail finding some slices. 
+I implemented more complex method, and it will work well in most cases. 
+Thanks [swarup459](https://github.com/Yutaka-Sawada/MultiPar/issues/42) for bug report, offering samples, and many tests.
 
- When you created many PAR2 files (more than 512), verification had failed in previous versions. 
-I (and many users) didn't see this bug for long time. 
-Normally people don't create so many PAR2 files. 
-Thanks Martin Klefas-Stennett for finding this rare problem. 
+  It's possible to add PAR2 recovery record to a ZIP file. 
+When I wrote the instructions ago, 4 GB over ZIP file was not common so much. 
+Because recent Windows OS supports ZIP64 format, I updated the text for compatibility. 
+You may read the "Add recovery record" page of MultiPar's Help documents. 
+Or, you may read [the article on my web-site](http://hp.vector.co.jp/authors/VA021385/record.htm). 
+Now, MultiPar supports large ZIP file with ZIP64 format. 
+Thanks [Dwaine Gonyier](https://github.com/Yutaka-Sawada/MultiPar/issues/44) for noticing the potential problem.
 
 
-[ Changes from 1.3.1.4 to 1.3.1.5 ]  
+[ Changes from 1.3.1.8 to 1.3.1.9 ]  
+
+Installer update  
+- Inno Setup was updated from v6.1.2 to v6.2.0.  
 
 GUI update  
 - Change  
-  - Max block size is increased to 2,118,123,520 bytes. (1.97 GB)  
-  - Max split size is increased to 2,147,287,040 bytes. (1.99 GB)  
+  - Clickable link to access author's page becomes SSL.  
+  - Appending recovery record supports 2 GB over file size.  
 
-- Bug fix  
-  - Memory allocation failure in verifying over than 512 PAR2 files was fixed.  
-
-PAR2 client update  
+PAR2 clients update  
 - Change  
-  - Max slice size is increased to 2,147,483,644 bytes. (2 GB)  
-  - Max split size is increased to 4,294,967,292 bytes. (4 GB)  
-  - When source files are on SSD, verification may become faster.  
+  - When source files are on NVMe SSD, verification may become faster.  
+  - Appending recovery record supports ZIP64 format.  
 
 - Improvement  
-  - Setup of CRC-32 may become slightly faster on recent CPU.  
+  - Simple verification will find a short slice in a tiny file.  
 
 - Bug fix  
-  - A bug in calculating hash of source files on SSD was fixed.  
-  - A bug in verifying source files without Slice Checksum packet was fixed.  
+  - A stack overflow problem in quick sort function was removed.  
+  - A bug of searching slices in a file with repeated content was fixed.  
 
 
 [ Hash value ]  
 
-MultiPar1315.zip  
-MD5: DB3661C2AD4D5B6404C7FC8C4CF5AE2B  
-SHA1: AECCB95F757163E439B9BB6372050D2AB1538D39  
+MultiPar131.zip  
+MD5: EF3486BB39724EF6A4109F5B02D4E027  
+SHA1: D935BFAFF5156C9460FB45639271339D1068F522  
 
-MultiPar1315_setup.exe  
-MD5: ECFC7F69FB5AF168478C24F5C06F025E  
-SHA1: 66EB941B3E293EB35A48FAD80DD94BC3980DA3E8  
+MultiPar131_setup.exe  
+MD5: E2F6EF68AEB9BE0CCDD4D5ABF2A3F318  
+SHA1: C2615960B9B28223BC174FC1175CAAECCC8A713A  
+  To install under "Program Files" or "Program Files (x86)" directory, 
+you must start the installer with administrative privileges by selecting 
+"Run as administrator" on right-click menu.  
 
 
 [ Hash value of other source code packages ]  
- Old versions and source code packages are available at [OneDrive](https://1drv.ms/u/s!AtGhNMUyvbWOaSo1n_R8awJ_hg0?e=4V0gXu) now.  
+  Old versions and source code packages are available at 
+[GitHub](https://github.com/Yutaka-Sawada/MultiPar/releases) or 
+[OneDrive](https://1drv.ms/u/s!AtGhNMUyvbWOaSo1n_R8awJ_hg0?e=4V0gXu).  
 
-MultiPar_par2j_1315.7z  
-MD5: FB245B4AFDB45F6C89FFC6231ECA3868  
-SHA1: FC32C6F0A88C2750C9A8408525359AED6DBE2B2C  
+MultiPar_par2j_1319.7z  
+MD5: 9AC4C38762E2DBF64D6D3A738CD7CCD6  
+SHA1: FFC0DA1A0BBCAD08489C5499154DAA0216E10F51  
 
-MultiPar_par2j_extra_1294.7z  
-MD5: 6D165CDA2645924ACAFE902F02FAD309  
-SHA1: D77D4EA778423D5D8F820B8EAF97F733950F9FB1  
+MultiPar_par1j_1318.7z  
+MD5: F66285403BA0AD856BA6A8CCD922EBF5  
+SHA1: 4CF5D819B16E60F1BBD82415D5F68CB46D3F53C3  
 
-MultiPar_par1j_1314.7z  
-MD5: E082D8A598A262E64CBAE2C42283488A  
-SHA1: F706A3C1FCCAFCE225677BA0785CDB39870206A1  
+MultiPar_sfv_md5_1318.7z  
+MD5: 4E6433808625C088E2773C961BBEBBD2  
+SHA1: 68B54D178BA58637F63CC3E0CC656C96D4472A33  
 
-MultiPar_sfv_md5_1314.7z  
-MD5: 355B0CC6B9613B422126EF9EDAC15F87  
-SHA1: EFD2CF25C47851B86EB12FD5B709BFEEC73AC36D  
+MultiPar_ShlExt_1318.7z  
+MD5: 57E79698A53458681CD19842391A202F  
+SHA1: 646145F1B429C1CF592F907614889C98FBE7E756  
 
-MultiPar_ShlExt_1298.7z  
-MD5: BE0F04DF1A6B936F23F6F01930562248  
-SHA1: 52818266B45ECE135EECFF12D8DA2640A6AD5075  
+MultiPar_ResUI_1319.7z  
+MD5: E03B90A433466C945D726B5A49B4E547  
+SHA1: E30FB11B8F121D44CC1CC368E8D91F06CFC15551  
 
-MultiPar_ResUI_1315.7z  
-MD5: B8B6A9DA4BD9D418CFA90FD01CCC615A  
-SHA1: E5B4B16DBCAECACA2095A64006C117E04D3C9E74  
-
-MultiPar_Help_1314.7z  
-MD5: 5D274F59A5B908B1E31D62CD4F4A0D54  
-SHA1: CF1114B3850CDF52535A2C03ED374D1FA5E6B30E  
+MultiPar_Help_1319.7z  
+MD5: 37547FA074DC24491D1696F6F0DB7452  
+SHA1: 8069C5745F9C7660236F17E3E087B4F7324382ED