By default, we are searching in the PATH env var.
However, with an appImage, the executable directory is not in the PATH,
so we have to use an absolute path if we can.
If we cannot find the aria2c executable in the executable directory let's
try to use the system one.
`reader.getFileSize()` return the size of the zim in Kbyte in a
`unsigned int` (32 bits). This is ok as it would overflow if the size
of the size is greater than 4294967295 kbytes (so ~4Tbytes).
However, we need to convert the return size into a unsigned 64 bits integer
else, when converting to bytes, we will overflow at 4Gbytes.
Even in `m_size` is a uint64_t.
When we do a search and paging the result, we need to display to the
user the total number of book, not only the `itemsPerPage`.
So, we need to parse correctly the xml to keep information of the total
number of book.
The value is store as a string in in the xml, so we cannot use getAsI.
We have to get the string and parse it to an int.
We cannot use strtoull because android stdc++ lib doesn't have it.
We have to implement our how parseFromString function using a
istringstream.
When parsing a opds feed, the favicon is a url, not a dataurl.
If we download the favicon all the times, it may take a lot of time to
parse the feed.
We store the url and download the favicon only when needed (when displayed)
- "winsock2.h" needs to be included before "windows.h". But if a
compilation unit include "windows.h" and after "networkTools.h", we
fails and it is complicated to handle. The include must not be in the
header but in the cpp
- windows define some ERROR macro. It is a pitty but we cannot use `ERROR`
in our enum.
- If build statically using mingw we need to define `CURL_STATICLIB`
Library client (kiwix-desktop) need to know when a book is added to
library by the manager. By using a LibraryManipulator, we can do
dependency injection.
