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better error handling which always reports the right file name

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krangelov
2021-09-07 15:54:27 +02:00
parent 8936e6211e
commit a843ddba55
11 changed files with 95 additions and 49 deletions
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8
src/runtime/haskell/PGF2/FFI.hsc
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@@ -193,7 +193,7 @@ newtype PGFError = PGFError String
instance Exception PGFError
withPgfExn fpath f =
withPgfExn f =
allocaBytes (#size PgfExn) $ \c_exn -> do
res <- f c_exn
ex_type <- (#peek PgfExn, type) c_exn :: IO (#type PgfExnType)
@@ -201,7 +201,11 @@ withPgfExn fpath f =
(#const PGF_EXN_NONE) -> return res
(#const PGF_EXN_SYSTEM_ERROR) -> do
errno <- (#peek PgfExn, code) c_exn
ioError (errnoToIOError "readPGF" (Errno errno) Nothing (Just fpath))
c_msg <- (#peek PgfExn, msg) c_exn
mb_fpath <- if c_msg == nullPtr
then return Nothing
else fmap Just (peekCString c_msg)
ioError (errnoToIOError "readPGF" (Errno errno) Nothing mb_fpath)
(#const PGF_EXN_PGF_ERROR) -> do
c_msg <- (#peek PgfExn, msg) c_exn
msg <- peekCString c_msg