Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/third_party/rust/libloading/src/error.rs b/third_party/rust/libloading/src/error.rs
new file mode 100644
index 0000000000..dcbe2b1143
--- /dev/null
+++ b/third_party/rust/libloading/src/error.rs
@@ -0,0 +1,114 @@
+use std::ffi::CString;
+
+pub struct DlDescription(pub(crate) CString);
+
+impl std::fmt::Debug for DlDescription {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Debug::fmt(&self.0, f)
+    }
+}
+
+pub struct WindowsError(pub(crate) std::io::Error);
+
+impl std::fmt::Debug for WindowsError {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Debug::fmt(&self.0, f)
+    }
+}
+
+#[derive(Debug)]
+#[non_exhaustive]
+pub enum Error {
+    /// The `dlopen` call failed.
+    DlOpen { desc: DlDescription },
+    /// The `dlopen` call failed and system did not report an error.
+    DlOpenUnknown,
+    /// The `dlsym` call failed.
+    DlSym { desc: DlDescription },
+    /// The `dlsym` call failed and system did not report an error.
+    DlSymUnknown,
+    /// The `dlclose` call failed.
+    DlClose { desc: DlDescription },
+    /// The `dlclose` call failed and system did not report an error.
+    DlCloseUnknown,
+    /// The `LoadLibraryW` call failed.
+    LoadLibraryW { source: WindowsError },
+    /// The `LoadLibraryW` call failed and system did not report an error.
+    LoadLibraryWUnknown,
+    /// The `GetProcAddress` call failed.
+    GetProcAddress { source: WindowsError },
+    /// The `GetProcAddressUnknown` call failed and system did not report an error.
+    GetProcAddressUnknown,
+    /// The `FreeLibrary` call failed.
+    FreeLibrary { source: WindowsError },
+    /// The `FreeLibrary` call failed and system did not report an error.
+    FreeLibraryUnknown,
+    /// The requested type cannot possibly work.
+    IncompatibleSize,
+    /// Could not create a new CString.
+    CreateCString { source: std::ffi::NulError },
+    /// Could not create a new CString from bytes with trailing null.
+    CreateCStringWithTrailing { source: std::ffi::FromBytesWithNulError },
+}
+
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        use Error::*;
+        match *self {
+            CreateCString { ref source } => Some(source),
+            CreateCStringWithTrailing { ref source } => Some(source),
+            LoadLibraryW { ref source } => Some(&source.0),
+            GetProcAddress { ref source } => Some(&source.0),
+            FreeLibrary { ref source } => Some(&source.0),
+            _ => None,
+        }
+    }
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        use Error::*;
+        match *self {
+            DlOpen { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
+            DlOpenUnknown => write!(f, "dlopen failed, but system did not report the error"),
+            DlSym { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
+            DlSymUnknown => write!(f, "dlsym failed, but system did not report the error"),
+            DlClose { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
+            DlCloseUnknown => write!(f, "dlclose failed, but system did not report the error"),
+            LoadLibraryW { .. } => write!(f, "LoadLibraryW failed"),
+            LoadLibraryWUnknown =>
+                write!(f, "LoadLibraryW failed, but system did not report the error"),
+            GetProcAddress { .. } => write!(f, "GetProcAddress failed"),
+            GetProcAddressUnknown =>
+                write!(f, "GetProcAddress failed, but system did not report the error"),
+            FreeLibrary { .. } => write!(f, "FreeLibrary failed"),
+            FreeLibraryUnknown =>
+                write!(f, "FreeLibrary failed, but system did not report the error"),
+            CreateCString { .. } => write!(f, "could not create a C string from bytes"),
+            CreateCStringWithTrailing { .. } =>
+                write!(f, "could not create a C string from bytes with trailing null"),
+            IncompatibleSize => write!(f, "requested type cannot possibly work"),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn error_send() {
+        fn assert_send<T: Send>() {}
+        assert_send::<super::Error>();
+    }
+
+    #[test]
+    fn error_sync() {
+        fn assert_sync<T: Sync>() {}
+        assert_sync::<super::Error>();
+    }
+
+    #[test]
+    fn error_display() {
+        fn assert_display<T: std::fmt::Display>() {}
+        assert_display::<super::Error>();
+    }
+}