Struct fuel_vm::interpreter::MemoryRange

pub struct MemoryRange(/* private fields */);

Memory range representation for the VM, checked to be in-bounds on construction.

Implementations

impl MemoryRange

pub fn new<A: ToAddr, B: ToAddr>( address: A, size: B ) -> Result<Self, PanicReason>

Create a new memory range represented as [address, address + size[.

pub fn new_const<A: ToAddr, const SIZE: usize>( address: A ) -> Result<Self, PanicReason>

Create a new const sized memory range.

pub fn new_overflowing_op<A: ToAddr, T: ToAddr, F>( overflowing_op: F, base: T, offset: T, size: A ) -> Result<Self, PanicReason>

where F: FnOnce(T, T) -> (T, bool),

Uses a overflow-capturing operator to combine base and offset into the start of a memory range, returning an error on overflow, and then checks that the resulting range is within the VM memory.

pub fn truncated(&self, limit: usize) -> Self

Truncate a memory range to a new size if it’s smaller then current one.

pub fn is_empty(&self) -> bool

Return true if the length is 0.

pub fn usizes(&self) -> Range<usize>

Convert to a raw usize range.

pub fn words(&self) -> Range<Word>

Convert to a raw Word range.

pub fn split_at_offset(self, at: usize) -> (Self, Self)

Splits range at given relative offset. Panics if offset > range length.

pub fn shrink_end(&mut self, by: usize)

This function is safe because it is only used to shrink the range and worst case the range will be empty.

pub fn grow_start(&mut self, by: usize)

This function is safe because it is only used to grow the range and worst case the range will be empty.

pub fn read(self, memory: &[u8; 67108864]) -> &[u8]

Get the memory slice for this range.

pub fn write(self, memory: &mut [u8; 67108864]) -> &mut [u8]

Get the mutable memory slice for this range.

Methods from Deref<Target = Range<usize>>

pub fn contains<U>(&self, item: &U) -> bool

where Idx: PartialOrd<U>, U: PartialOrd<Idx> + ?Sized,

Returns true if item is contained in the range.

Examples

assert!(!(3..5).contains(&2));
assert!( (3..5).contains(&3));
assert!( (3..5).contains(&4));
assert!(!(3..5).contains(&5));

assert!(!(3..3).contains(&3));
assert!(!(3..2).contains(&3));

assert!( (0.0..1.0).contains(&0.5));
assert!(!(0.0..1.0).contains(&f32::NAN));
assert!(!(0.0..f32::NAN).contains(&0.5));
assert!(!(f32::NAN..1.0).contains(&0.5));

pub fn is_empty(&self) -> bool

Returns true if the range contains no items.

Examples

assert!(!(3..5).is_empty());
assert!( (3..3).is_empty());
assert!( (3..2).is_empty());

The range is empty if either side is incomparable:

assert!(!(3.0..5.0).is_empty());
assert!( (3.0..f32::NAN).is_empty());
assert!( (f32::NAN..5.0).is_empty());

Trait Implementations

impl Clone for MemoryRange

fn clone(&self) -> MemoryRange

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MemoryRange

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MemoryRange

fn default() -> Self

Returns the “default value” for a type.

impl Deref for MemoryRange

type Target = Range<usize>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for MemoryRange

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MemoryRange

fn eq(&self, other: &MemoryRange) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for MemoryRange

impl StructuralEq for MemoryRange

impl StructuralPartialEq for MemoryRange