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+# OA2
+
+## Initialisation of the GO directory structure
+
+Principles are extracted from :
+
+    - https://www.wolfe.id.au/2020/03/10/starting-a-go-project/
+    - https://dev.to/johanlejdung/a-mini-guide-go-modules-and-private-repositories-4c7o
+    - https://blog.otso.fr/2020-10-11-organisation-projet-go-standard
+
+```bash
+$ go mod init git.metabarcoding.org/lecasofts/go/oa2.git
+go: creating new go.mod: module git.metabarcoding.org/lecasofts/go/oa2.git
+```
+
+```bash
+go env -w GOPRIVATE=git.metabarcoding.org/lecasofts/go/*
+```
+
+```bash
+mkdir cmd       # Inside this add a folder per program
+mkdir pkg       # Inside this add a folder per library of the project
+mkdir internal  # Inside this add a folder per private library of the project
+```
+
+
+## Some information in interfacing Go and C
+
+    - <https://karthikkaranth.me/blog/calling-c-code-from-go/>
+    
+## Reading Fasta/Fastq files
+
+    - <http://lh3lh3.users.sourceforge.net/parsefastq.shtml>
+    
+## Some consideration on `zlib`
+
+### Closing a `gzFile`
+
+https://stackoverflow.com/questions/65704567/how-to-properly-open-and-close-an-already-fopened-gzip-file-with-zlib
+
+File descriptors are obtained from calls like open, dup, creat, pipe or fileno 
+(in the file has been previously opened with fopen). 
+The next call of gzclose on the returned gzFile will also close the file 
+descriptor fd, just like fclose(fdopen(fd), mode) closes the file descriptor fd. 
+If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, mode);. 
+If you are using fileno() to get the file descriptor from a FILE *, then you 
+will have to use dup() to avoid double-close()ing the file descriptor. 
+Both gzclose() and fclose() will close the associated file descriptor, 
+so they need to have different file descriptors.
+