Enum IndirectAdjustmentOp 

#[non_exhaustive]
pub enum IndirectAdjustmentOp {
    Add,
    Mul,
    Div,
    Mod,
    And,
    Or,
    Xor,
}

Arithmetic operation applied to the value read at an indirect offset’s base_offset before the result is used as the final file offset.

magic(5) supports +, -, *, /, %, &, |, and ^ between the pointer-type specifier and the operand inside the parentheses. Addition and subtraction collapse to IndirectAdjustmentOp::Add with a signed adjustment (so (N.X-1) is Add(-1) rather than a separate Sub variant); the remaining operators each have a dedicated variant.

The default is IndirectAdjustmentOp::Add; an indirect offset with no arithmetic — just (base.type) — is encoded as Add with adjustment: 0, preserving backwards compatibility.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;

assert_eq!(IndirectAdjustmentOp::default(), IndirectAdjustmentOp::Add);

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Add

Addition (also covers subtraction via negative adjustment).

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
assert_eq!(IndirectAdjustmentOp::default(), IndirectAdjustmentOp::Add);

Mul

Multiplication: pointer_value * adjustment.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::Mul;
assert_eq!(op, IndirectAdjustmentOp::Mul);

Div

Truncating integer division: pointer_value / adjustment. Division by zero is rejected by the evaluator with an error.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::Div;
assert_eq!(op, IndirectAdjustmentOp::Div);

Mod

Remainder: pointer_value % adjustment. Modulo by zero is rejected by the evaluator with an error.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::Mod;
assert_eq!(op, IndirectAdjustmentOp::Mod);

And

Bitwise AND: pointer_value & adjustment.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::And;
assert_eq!(op, IndirectAdjustmentOp::And);

Or

Bitwise OR: pointer_value | adjustment.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::Or;
assert_eq!(op, IndirectAdjustmentOp::Or);

Xor

Bitwise XOR: pointer_value ^ adjustment.

Examples

use libmagic_rs::parser::ast::IndirectAdjustmentOp;
let op = IndirectAdjustmentOp::Xor;
assert_eq!(op, IndirectAdjustmentOp::Xor);

Trait Implementations

impl Clone for IndirectAdjustmentOp

fn clone(&self) -> IndirectAdjustmentOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndirectAdjustmentOp

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

Formats the value using the given formatter.

impl Default for IndirectAdjustmentOp

fn default() -> IndirectAdjustmentOp

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for IndirectAdjustmentOp

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for IndirectAdjustmentOp

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 IndirectAdjustmentOp

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for IndirectAdjustmentOp

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for IndirectAdjustmentOp

impl Eq for IndirectAdjustmentOp

impl StructuralPartialEq for IndirectAdjustmentOp