176 lines
5.2 KiB
Rust
176 lines
5.2 KiB
Rust
use crate::avm1::object::Object;
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use crate::avm1::{ActionContext, Error};
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use gc_arena::GcCell;
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#[derive(Clone, Debug)]
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#[allow(dead_code)]
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pub enum Value<'gc> {
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Undefined,
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Null,
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Bool(bool),
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Number(f64),
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String(String),
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Object(GcCell<'gc, Object<'gc>>),
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}
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unsafe impl<'gc> gc_arena::Collect for Value<'gc> {
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fn trace(&self, cc: gc_arena::CollectionContext) {
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if let Value::Object(object) = self {
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object.trace(cc);
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}
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}
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}
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impl PartialEq for Value<'_> {
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fn eq(&self, other: &Self) -> bool {
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match self {
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Value::Undefined => match other {
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Value::Undefined => true,
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_ => false,
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},
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Value::Null => match other {
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Value::Null => true,
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_ => false,
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},
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Value::Bool(value) => match other {
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Value::Bool(other_value) => value == other_value,
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_ => false,
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},
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Value::Number(value) => match other {
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Value::Number(other_value) => {
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(value == other_value) || (value.is_nan() && other_value.is_nan())
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}
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_ => false,
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},
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Value::String(value) => match other {
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Value::String(other_value) => value == other_value,
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_ => false,
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},
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Value::Object(value) => match other {
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Value::Object(other_value) => value.as_ptr() == other_value.as_ptr(),
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_ => false,
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},
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}
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}
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}
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impl<'gc> Value<'gc> {
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pub fn into_number_v1(self) -> f64 {
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match self {
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Value::Bool(true) => 1.0,
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Value::Number(v) => v,
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Value::String(v) => v.parse().unwrap_or(0.0),
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_ => 0.0,
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}
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}
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pub fn as_number(&self) -> f64 {
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// ECMA-262 2nd edtion s. 9.3 ToNumber
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use std::f64::NAN;
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match self {
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Value::Undefined => NAN,
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Value::Null => NAN,
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Value::Bool(false) => 0.0,
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Value::Bool(true) => 1.0,
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Value::Number(v) => *v,
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Value::String(v) => v.parse().unwrap_or(NAN), // TODO(Herschel): Handle Infinity/etc.?
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Value::Object(_object) => {
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log::error!("Unimplemented: Object ToNumber");
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0.0
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}
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}
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}
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pub fn from_bool_v1(value: bool, swf_version: u8) -> Value<'gc> {
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// SWF version 4 did not have true bools and will push bools as 0 or 1.
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// e.g. SWF19 p. 72:
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// "If the numbers are equal, true is pushed to the stack for SWF 5 and later. For SWF 4, 1 is pushed to the stack."
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if swf_version >= 5 {
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Value::Bool(value)
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} else {
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Value::Number(if value { 1.0 } else { 0.0 })
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}
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}
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pub fn into_string(self) -> String {
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match self {
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Value::Undefined => "undefined".to_string(),
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Value::Null => "null".to_string(),
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Value::Bool(v) => v.to_string(),
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Value::Number(v) => v.to_string(), // TODO(Herschel): Rounding for int?
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Value::String(v) => v,
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Value::Object(object) => object.read().as_string(),
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}
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}
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pub fn as_bool(&self) -> bool {
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match *self {
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Value::Bool(v) => v,
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Value::Number(v) => v != 0.0,
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// TODO(Herschel): Value::String(v) => ??
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_ => false,
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}
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}
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pub fn type_of(&self) -> Value<'gc> {
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Value::String(
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match self {
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Value::Undefined => "undefined",
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Value::Null => "null",
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Value::Number(_) => "number",
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Value::Bool(_) => "boolean",
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Value::String(_) => "string",
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Value::Object(object) => object.read().type_of(),
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}
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.to_string(),
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)
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}
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pub fn as_i32(&self) -> Result<i32, Error> {
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self.as_f64().map(|n| n as i32)
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}
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pub fn as_u32(&self) -> Result<u32, Error> {
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self.as_f64().map(|n| n as u32)
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}
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pub fn as_i64(&self) -> Result<i64, Error> {
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self.as_f64().map(|n| n as i64)
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}
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pub fn as_f64(&self) -> Result<f64, Error> {
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match *self {
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Value::Number(v) => Ok(v),
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_ => Err(format!("Expected Number, found {:?}", self).into()),
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}
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}
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pub fn as_string(&self) -> Result<&String, Error> {
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match self {
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Value::String(s) => Ok(s),
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_ => Err(format!("Expected String, found {:?}", self).into()),
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}
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}
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pub fn as_object(&self) -> Result<GcCell<'gc, Object<'gc>>, Error> {
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if let Value::Object(object) = self {
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Ok(object.to_owned())
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} else {
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Err(format!("Expected Object, found {:?}", self).into())
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}
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}
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pub fn call(
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&self,
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context: &mut ActionContext<'_, 'gc, '_>,
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this: GcCell<'gc, Object<'gc>>,
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args: &[Value<'gc>],
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) -> Result<Value<'gc>, Error> {
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if let Value::Object(object) = self {
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Ok(object.read().call(context, this, args))
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} else {
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Err(format!("Expected function, found {:?}", self).into())
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}
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}
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}
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