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use core::fmt;
#[derive(Debug)]
#[non_exhaustive]
pub enum Error {
Io(std::io::Error),
InvalidMagic {
got: [u8; 4],
},
UnsupportedVersion {
got: u32,
},
TotalSizeMismatch {
header: u32,
actual: u64,
},
InvalidEntryCount {
got: i32,
},
TooManyEntries {
got: usize,
},
DirectoryOutOfBounds {
directory_offset: u64,
directory_len: u64,
file_len: u64,
},
EntryIdOutOfRange {
id: u32,
entry_count: u32,
},
EntryDataOutOfBounds {
id: u32,
offset: u64,
size: u32,
directory_offset: u64,
},
NameTooLong {
got: usize,
max: usize,
},
NameContainsNul,
BadNameEncoding,
IntegerOverflow,
RawModeDisallowsOperation(&'static str),
}
impl From<std::io::Error> for Error {
fn from(value: std::io::Error) -> Self {
Self::Io(value)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Error::Io(e) => write!(f, "I/O error: {e}"),
Error::InvalidMagic { got } => write!(f, "invalid NRes magic: {got:02X?}"),
Error::UnsupportedVersion { got } => {
write!(f, "unsupported NRes version: {got:#x}")
}
Error::TotalSizeMismatch { header, actual } => {
write!(f, "NRes total_size mismatch: header={header}, actual={actual}")
}
Error::InvalidEntryCount { got } => write!(f, "invalid entry_count: {got}"),
Error::TooManyEntries { got } => write!(f, "too many entries: {got} exceeds u32::MAX"),
Error::DirectoryOutOfBounds {
directory_offset,
directory_len,
file_len,
} => write!(
f,
"directory out of bounds: off={directory_offset}, len={directory_len}, file={file_len}"
),
Error::EntryIdOutOfRange { id, entry_count } => {
write!(f, "entry id out of range: id={id}, count={entry_count}")
}
Error::EntryDataOutOfBounds {
id,
offset,
size,
directory_offset,
} => write!(
f,
"entry data out of bounds: id={id}, off={offset}, size={size}, dir_off={directory_offset}"
),
Error::NameTooLong { got, max } => write!(f, "name too long: {got} > {max}"),
Error::NameContainsNul => write!(f, "name contains NUL byte"),
Error::BadNameEncoding => write!(f, "bad name encoding"),
Error::IntegerOverflow => write!(f, "integer overflow"),
Error::RawModeDisallowsOperation(op) => {
write!(f, "operation not allowed in raw mode: {op}")
}
}
}
}
impl std::error::Error for Error {}
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