1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
-- Copyright 2018 Google LLC
--
-- Licensed under the Apache License, Version 2.0 (the "License"); you may not
-- use this file except in compliance with the License. You may obtain a copy of
-- the License at
--
-- https://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-- License for the specific language governing permissions and limitations under
-- the License.
module BTLS.Result
( alwaysSucceeds, requireSuccess
, Error, file, line, errorData, errorDataIsHumanReadable
) where
import Control.Exception (assert)
import Control.Monad (when)
import Data.Bits ((.&.))
import Data.ByteString (ByteString)
import Foreign (allocaArray)
import Foreign.C.String (peekCString)
import Foreign.C.Types
import Foreign.Marshal.Unsafe (unsafeLocalState)
import BTLS.BoringSSL.Err
alwaysSucceeds :: CInt -> IO ()
alwaysSucceeds r = assert (r == 1) (return ())
requireSuccess :: CInt -> IO ()
requireSuccess r = when (r /= 1) $ ioError (userError "BoringSSL failure")
data Error = Error
{ err :: Err
, file :: FilePath
, line :: Int
, errorData :: Maybe ByteString
, flags :: CInt
} deriving Eq
errorDataIsHumanReadable :: Error -> Bool
errorDataIsHumanReadable e = flags e .&. errFlagString == 1
instance Show Error where
show e =
let len = 120 in
unsafeLocalState $
allocaArray len $ \pOut -> do
errErrorStringN (err e) pOut len
peekCString pOut
|
