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(following a discussion from https://github.com/alcover/buffet/commit/eab9648ff19483f57fd...)
> if nobody's looking, we are go
https://github.com/alcover/buffet/blob/dee3eb65f37ca07ea3d27...
And otherwise, when is it freed?
The refcount mechanism looks wrong to me: either the ownership of internal data is shared between instances (it seems it is not the case), either the owner is well defined and does not need a refcount.
It appears that the refcount is used to avoid freeing the owner data if Buffet views are still alive. But using the views after freeing the referenced data is incorrect usage anyway, so it looks like defensive programming, trading a use-after-free for a leak.
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This is somewhat similar to how Swift represents Strings internally (https://github.com/apple/swift/blob/main/stdlib/public/core/...).
Swift needs to support a few other options (it tracks UTF-8 vs UTF-16 encodings, and needs to know if a String is bridged from an Objective-C object), and it doesn't cap lengths or offsets at 32b. Those details aside, this is a very familiar approach.
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I used https://github.com/kumkee/utf8 (along with a bit of hacking) in my toy scheme interpreter to get Unicode strings.
Had to adapt some script I found to generate character class lookup functions to make it fully work IIRC and still need to plug-in some sort of copy on write mechanism since the strings managed in a shared buffer but other than that it works pretty well…if you’re into the unicorn strings that is.
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> I was thinking about Simple Dynamic Strings but I like this better.
Oh! here's my chance to plug https://github.com/alcover/stricks ! It follows the same principle as SDS (i.e user-facing type is char*) but is much faster (see bench) and frankly nicer to read through.
Not as feature complete, though.
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Python is similar[1]
>The growth pattern is: 0, 4, 8, 16, 25, 35, 46, 58, 72, 88, ...
https://github.com/python/cpython/blob/3.7/Objects/listobjec...
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That would be nice, then I wouldn't have to use non-standard stuff.
I made my own easy-to-incorporate-into-any-project library - https://github.com/lelanthran/libds - just copy the ds_*.h and ds_*.c into a project and you're good to go.
I'm not saying it will work for you, but it works for me.
