[WasmFS] Return errors from getEntries and getNumEntries
#17807
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To catch mistakes in backend implementations, assert where possible that error codes are negative.
Make the return type of `getEntries` a variant that can be either a vector of entries as before or a negative error code. Update the return type of `getNumEntries` to be a ssize_t so it can return negative error codes as well. This caps the number of directory entries that can be reported at around two billion, but that should be sufficient. I have manually tested via an injected error that the error handling works correctly for the OPFS backend, although I was not able to construct a test case for this.
This was referenced Sep 6, 2022
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kripken
approved these changes
Sep 6, 2022
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Make the return type of
getEntriesa variant that can be either a vector ofentries as before or a negative error code. Update the return type of
getNumEntriesto be a ssize_t so it can return negative error codes as well.This caps the number of directory entries that can be reported at around two
billion, but that should be sufficient.
I have manually tested via an injected error that the error handling works
correctly for the OPFS backend, although I was not able to construct a test case
for this.