Method as_slice

crates/wiggle/src/lib.rs:131–137

Attempts to borrow a raw guest slice of memory pointed to by `ptr`. This method will attempt to return a raw pointer into guest memory. This can only be done for `Unshared` memories. A `Shared` memory will return `Ok(None)` here. # Errors An error is returned if `ptr` is out of bounds, misaligned, or otherwise not valid to read from.

(&self, ptr: GuestPtr<[u8]>)

    /// An error is returned if `ptr` is out of bounds, misaligned, or otherwise
    /// not valid to read from.
    pub fn as_slice(&self, ptr: GuestPtr<[u8]>) -> Result<Option<&[u8]>, GuestError> {
        let range = self.validate_range::<u8>(ptr.pointer.0, ptr.pointer.1)?;
        match self {
            GuestMemory::Unshared(slice) => Ok(Some(&slice[range])),
            GuestMemory::Shared(_) => Ok(None),
        }
    }

    /// Same as [`GuestMemory::as_slice`] but for strings.
    pub fn as_str(&self, ptr: GuestPtr<str>) -> Result<Option<&str>, GuestError> {