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Now we just pass down the value of n and check errno, plus
readDataLoop/writeDataLoop returns a bool indicating whether it failed.
For now this seems to work OK, but maybe I'll add a better abstraction
in the future.
EOFError is still used for handling failed packets; this is brittle,
and should be replaced once we have a proper buffering mechanism for
them. (That will also let us kill BufStream.)
Unrelated: this also fixes a bug in buffer with cacheId.
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Nim doesn't consider included files when recompiling C files, which
would sometimes lead to fixes not being compiled in without a clean
build.
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this is exactly why I shimmed in unsafeAddr, but the compiler isn't
cooperating... :(
well, it seems to work with auto.
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Only for SVG in image tags for now. Plus it comes with NanoSVG's
limitations, i.e. no text. Still, better than nothing.
I've gone through open tickets and PRs at upstream to check for known
security issues. As a recurring theme I found that parseTransform
fails to check the result of parseTransformArgs, so I fixed and
refactored that part. (Probably not a security issue, but still UB.)
Also, I've added a fix for an OOB read in parseColorRGB.
Future directions:
* replace nanosvgrast with our own rasterizer in canvas (will have to be
extended somewhat...)
* add text rendering (with unifont, which canvas already includes)
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