136 lines
4.8 KiB
Rust
136 lines
4.8 KiB
Rust
use std::ffi::{CString, CStr};
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/// A `dlerror` error.
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pub struct DlDescription(pub(crate) CString);
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impl std::fmt::Debug for DlDescription {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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std::fmt::Debug::fmt(&self.0, f)
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}
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}
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impl From<&CStr> for DlDescription {
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fn from(value: &CStr) -> Self {
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Self(value.into())
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}
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}
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/// A Windows API error.
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pub struct WindowsError(pub(crate) std::io::Error);
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impl std::fmt::Debug for WindowsError {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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std::fmt::Debug::fmt(&self.0, f)
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}
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}
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/// Errors.
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#[derive(Debug)]
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#[non_exhaustive]
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pub enum Error {
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/// The `dlopen` call failed.
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DlOpen {
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/// The source error.
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desc: DlDescription
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},
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/// The `dlopen` call failed and system did not report an error.
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DlOpenUnknown,
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/// The `dlsym` call failed.
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DlSym {
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/// The source error.
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desc: DlDescription
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},
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/// The `dlsym` call failed and system did not report an error.
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DlSymUnknown,
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/// The `dlclose` call failed.
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DlClose {
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/// The source error.
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desc: DlDescription
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},
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/// The `dlclose` call failed and system did not report an error.
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DlCloseUnknown,
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/// The `LoadLibraryW` call failed.
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LoadLibraryExW {
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/// The source error.
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source: WindowsError
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},
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/// The `LoadLibraryW` call failed and system did not report an error.
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LoadLibraryExWUnknown,
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/// The `GetModuleHandleExW` call failed.
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GetModuleHandleExW {
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/// The source error.
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source: WindowsError
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},
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/// The `GetModuleHandleExW` call failed and system did not report an error.
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GetModuleHandleExWUnknown,
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/// The `GetProcAddress` call failed.
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GetProcAddress {
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/// The source error.
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source: WindowsError
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},
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/// The `GetProcAddressUnknown` call failed and system did not report an error.
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GetProcAddressUnknown,
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/// The `FreeLibrary` call failed.
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FreeLibrary {
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/// The source error.
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source: WindowsError
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},
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/// The `FreeLibrary` call failed and system did not report an error.
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FreeLibraryUnknown,
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/// The requested type cannot possibly work.
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IncompatibleSize,
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/// Could not create a new CString.
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CreateCString {
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/// The source error.
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source: std::ffi::NulError
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},
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/// Could not create a new CString from bytes with trailing null.
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CreateCStringWithTrailing {
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/// The source error.
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source: std::ffi::FromBytesWithNulError
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},
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}
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impl std::error::Error for Error {
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fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
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use Error::*;
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match *self {
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CreateCString { ref source } => Some(source),
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CreateCStringWithTrailing { ref source } => Some(source),
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LoadLibraryExW { ref source } => Some(&source.0),
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GetProcAddress { ref source } => Some(&source.0),
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FreeLibrary { ref source } => Some(&source.0),
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_ => None,
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}
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}
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}
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impl std::fmt::Display for Error {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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use Error::*;
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match *self {
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DlOpen { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
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DlOpenUnknown => write!(f, "dlopen failed, but system did not report the error"),
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DlSym { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
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DlSymUnknown => write!(f, "dlsym failed, but system did not report the error"),
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DlClose { ref desc } => write!(f, "{}", desc.0.to_string_lossy()),
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DlCloseUnknown => write!(f, "dlclose failed, but system did not report the error"),
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LoadLibraryExW { .. } => write!(f, "LoadLibraryExW failed"),
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LoadLibraryExWUnknown =>
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write!(f, "LoadLibraryExW failed, but system did not report the error"),
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GetModuleHandleExW { .. } => write!(f, "GetModuleHandleExW failed"),
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GetModuleHandleExWUnknown =>
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write!(f, "GetModuleHandleExWUnknown failed, but system did not report the error"),
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GetProcAddress { .. } => write!(f, "GetProcAddress failed"),
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GetProcAddressUnknown =>
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write!(f, "GetProcAddress failed, but system did not report the error"),
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FreeLibrary { .. } => write!(f, "FreeLibrary failed"),
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FreeLibraryUnknown =>
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write!(f, "FreeLibrary failed, but system did not report the error"),
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CreateCString { .. } => write!(f, "could not create a C string from bytes"),
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CreateCStringWithTrailing { .. } =>
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write!(f, "could not create a C string from bytes with trailing null"),
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IncompatibleSize => write!(f, "requested type cannot possibly work"),
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}
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}
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}
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