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Use JS_NewStringCopyN for the representation of interface objects

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This removes the need for the final null byte and we can make
NonCallbackInterfaceObjectClass::new safe again I guess.
This commit is contained in:
Anthony Ramine 2016-05-15 01:19:52 +02:00
parent 2c674d0397
commit 4af3e9028d
2 changed files with 12 additions and 13 deletions
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18
components/script/dom/bindings/interface.rs
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@ -12,10 +12,10 @@ use js::glue::UncheckedUnwrapObject;
use js::jsapi::{Class, ClassExtension, ClassSpec, GetGlobalForObjectCrossCompartment};
use js::jsapi::{HandleObject, HandleValue, JSClass, JSContext, JSFunctionSpec};
use js::jsapi::{JSNative, JSFUN_CONSTRUCTOR, JSPROP_ENUMERATE, JSPROP_PERMANENT, JSPROP_READONLY};
use js::jsapi::{JSPROP_RESOLVING, JSPropertySpec, JSString, JS_DefineProperty1, JS_DefineProperty2};
use js::jsapi::{JS_AtomizeAndPinString, JS_DefineProperty4, JS_GetClass, JS_GetFunctionObject};
use js::jsapi::{JS_GetPrototype, JS_LinkConstructorAndPrototype, JS_NewFunction, JS_NewObject};
use js::jsapi::{JS_NewObjectWithUniqueType, JS_NewStringCopyZ, JS_DefineProperty};
use js::jsapi::{JSPROP_RESOLVING, JSPropertySpec, JSString, JS_AtomizeAndPinString};
use js::jsapi::{JS_DefineProperty, JS_DefineProperty1, JS_DefineProperty2, JS_DefineProperty4};
use js::jsapi::{JS_GetClass, JS_GetFunctionObject, JS_GetPrototype, JS_LinkConstructorAndPrototype};
use js::jsapi::{JS_NewFunction, JS_NewObject, JS_NewObjectWithUniqueType, JS_NewStringCopyN};
use js::jsapi::{MutableHandleObject, MutableHandleValue, ObjectOps, RootedObject, RootedString};
use js::jsapi::{RootedValue, Value};
use js::jsval::{BooleanValue, DoubleValue, Int32Value, JSVal, NullValue, UInt32Value};
@ -87,9 +87,9 @@ unsafe extern "C" fn fun_to_string_hook(cx: *mut JSContext,
-> *mut JSString {
let js_class = JS_GetClass(obj.get());
assert!(!js_class.is_null());
let object_class = &*(js_class as *const NonCallbackInterfaceObjectClass);
assert!(object_class.representation.last() == Some(&0));
let ret = JS_NewStringCopyZ(cx, object_class.representation.as_ptr() as *const libc::c_char);
let repr = (*(js_class as *const NonCallbackInterfaceObjectClass)).representation;
assert!(!repr.is_empty());
let ret = JS_NewStringCopyN(cx, repr.as_ptr() as *const libc::c_char, repr.len());
assert!(!ret.is_null());
ret
}
@ -103,7 +103,7 @@ pub struct NonCallbackInterfaceObjectClass {
pub proto_id: PrototypeList::ID,
/// The prototype depth of that interface, used in the hasInstance hook.
pub proto_depth: u16,
/// The string representation of the object (ends with '\0').
/// The string representation of the object.
pub representation: &'static [u8],
}
@ -111,7 +111,7 @@ unsafe impl Sync for NonCallbackInterfaceObjectClass {}
impl NonCallbackInterfaceObjectClass {
/// Create a new `NonCallbackInterfaceObjectClass` structure.
pub const unsafe fn new(
pub const fn new(
constructor_behavior: InterfaceConstructorBehavior,
string_rep: &'static [u8],
proto_id: PrototypeList::ID,