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Simplify some pattern-matches (#16402)

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When those match an exact combinator on Option / Result.

Tool-aided by [comby-rust](https://github.com/huitseeker/comby-rust).
This commit is contained in:
François Garillot
2021-04-08 14:40:37 -04:00
committed by GitHub
parent bb9d2fd07a
commit b08cff9e77
18 changed files with 60 additions and 110 deletions
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18
programs/bpf_loader/src/syscalls.rs
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@ -297,10 +297,8 @@ fn translate_type_inner<'a, T>(
Err(SyscallError::UnalignedPointer.into())
} else {
unsafe {
match translate(memory_mapping, access_type, vm_addr, size_of::<T>() as u64) {
Ok(value) => Ok(&mut *(value as *mut T)),
Err(e) => Err(e),
}
translate(memory_mapping, access_type, vm_addr, size_of::<T>() as u64)
.map(|value| &mut *(value as *mut T))
}
}
}
@ -316,10 +314,8 @@ fn translate_type<'a, T>(
vm_addr: u64,
loader_id: &Pubkey,
) -> Result<&'a T, EbpfError<BpfError>> {
match translate_type_inner::<T>(memory_mapping, AccessType::Load, vm_addr, loader_id) {
Ok(value) => Ok(&*value),
Err(e) => Err(e),
}
translate_type_inner::<T>(memory_mapping, AccessType::Load, vm_addr, loader_id)
.map(|value| &*value)
}
fn translate_slice_inner<'a, T>(
@ -361,10 +357,8 @@ fn translate_slice<'a, T>(
len: u64,
loader_id: &Pubkey,
) -> Result<&'a [T], EbpfError<BpfError>> {
match translate_slice_inner::<T>(memory_mapping, AccessType::Load, vm_addr, len, loader_id) {
Ok(value) => Ok(&*value),
Err(e) => Err(e),
}
translate_slice_inner::<T>(memory_mapping, AccessType::Load, vm_addr, len, loader_id)
.map(|value| &*value)
}
/// Take a virtual pointer to a string (points to BPF VM memory space), translate it