Implement getEnv and getEnvironment #232
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hasufell
commented
May 15, 2024
System/Win32/Console.hsc
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| where | ||
| -- according to https://learn.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-getenvironmentvariablew | ||
| maxLength :: Int | ||
| maxLength = 32767 |
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Documentation says "characters". Do they mean wide chars? Then we have to *2 this, I guess.
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Yeah, the buffer size is 16-bits, so 2^16-1 bytes.
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OsStringvariantSee haskell/filepath#221
base/ghc implementations: https://hackage.haskell.org/package/ghc-internal-9.1001.0/docs/src//GHC.Internal.System.Environment.html
Base runs two calls to
c_GetEnvironmentVariableto get a more accurate allocation. But it's an additional call.