mirror of
https://github.com/denoland/rusty_v8.git
synced 2024-12-27 01:29:19 -05:00
104 lines
2.6 KiB
Rust
104 lines
2.6 KiB
Rust
use std::alloc::Layout;
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use std::ptr::NonNull;
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use crate::HandleScope;
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use crate::Int32;
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use crate::Integer;
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use crate::Isolate;
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use crate::Local;
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use crate::Number;
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use crate::Uint32;
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extern "C" {
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fn v8__Number__New(isolate: *mut Isolate, value: f64) -> *const Number;
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fn v8__Number__Value(this: *const Number) -> f64;
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fn v8__Integer__New(isolate: *mut Isolate, value: i32) -> *const Integer;
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fn v8__Integer__NewFromUnsigned(
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isolate: *mut Isolate,
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value: u32,
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) -> *const Integer;
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fn v8__Integer__Value(this: *const Integer) -> i64;
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fn v8__Uint32__Value(this: *const Uint32) -> u32;
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fn v8__Int32__Value(this: *const Int32) -> i32;
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}
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impl Number {
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#[inline(always)]
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pub fn new<'s>(
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scope: &mut HandleScope<'s, ()>,
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value: f64,
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) -> Local<'s, Number> {
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unsafe {
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scope.cast_local(|sd| v8__Number__New(sd.get_isolate_ptr(), value))
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}
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.unwrap()
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}
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#[inline(always)]
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pub fn value(&self) -> f64 {
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unsafe { v8__Number__Value(self) }
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}
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}
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impl Integer {
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#[inline(always)]
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pub fn new<'s>(
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scope: &mut HandleScope<'s, ()>,
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value: i32,
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) -> Local<'s, Integer> {
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unsafe {
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scope.cast_local(|sd| v8__Integer__New(sd.get_isolate_ptr(), value))
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}
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.unwrap()
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}
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#[inline(always)]
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pub fn new_from_unsigned<'s>(
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scope: &mut HandleScope<'s, ()>,
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value: u32,
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) -> Local<'s, Integer> {
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unsafe {
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scope.cast_local(|sd| {
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v8__Integer__NewFromUnsigned(sd.get_isolate_ptr(), value)
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})
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}
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.unwrap()
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}
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#[inline(always)]
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pub fn value(&self) -> i64 {
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unsafe { v8__Integer__Value(self) }
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}
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/// Internal helper function to produce a handle containing a SMI zero value,
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/// without the need for the caller to provide (or have entered) a
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/// `HandleScope`.
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#[inline(always)]
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pub(crate) fn zero<'s>() -> Local<'s, Integer> {
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// The SMI representation of zero is also zero. In debug builds, double
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// check this, so in the unlikely event that V8 changes its internal
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// representation of SMIs such that this invariant no longer holds, we'd
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// catch it.
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static ZERO_SMI: usize = 0;
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let zero_raw = &ZERO_SMI as *const _ as *mut Self;
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let zero_nn = unsafe { NonNull::new_unchecked(zero_raw) };
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let zero_local = unsafe { Local::from_non_null(zero_nn) };
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debug_assert_eq!(Layout::new::<usize>(), Layout::new::<Local<Self>>());
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debug_assert_eq!(zero_local.value(), 0);
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zero_local
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}
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}
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impl Uint32 {
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#[inline(always)]
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pub fn value(&self) -> u32 {
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unsafe { v8__Uint32__Value(self) }
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}
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}
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impl Int32 {
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#[inline(always)]
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pub fn value(&self) -> i32 {
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unsafe { v8__Int32__Value(self) }
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}
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}
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