stdlib: base64 stream decoder #21348
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linusg
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Sep 9, 2024
linusg
reviewed
Sep 9, 2024
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Decoding part related to #20961.
This proposes stream-friendly interface for base64 decoding (decoding to stream, decoding from read stream to write stream).
While writing this, i realized the original base64 decoder with ignored characters was doing some semi-complicated stuff to keep track of its decoding state. This rewrites the original decoder to rely on the decoder without ignores, moving the track keeping to simply chunking 4 valid characters using streams. This should be equivalent in performances and do not requires memory allocation either.