diff options
Diffstat (limited to 'serde_v8/ser.rs')
-rw-r--r-- | serde_v8/ser.rs | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/serde_v8/ser.rs b/serde_v8/ser.rs index 0c6c52da0..31d3e3144 100644 --- a/serde_v8/ser.rs +++ b/serde_v8/ser.rs @@ -377,6 +377,9 @@ macro_rules! forward_to { }; } +const MAX_SAFE_INTEGER: i64 = (1 << 53) - 1; +const MIN_SAFE_INTEGER: i64 = -MAX_SAFE_INTEGER; + impl<'a, 'b, 'c> ser::Serializer for Serializer<'a, 'b, 'c> { type Ok = v8::Local<'a, v8::Value>; type Error = Error; @@ -399,8 +402,6 @@ impl<'a, 'b, 'c> ser::Serializer for Serializer<'a, 'b, 'c> { serialize_u16(u16, serialize_u32, 'a); serialize_f32(f32, serialize_f64, 'a); - serialize_u64(u64, serialize_f64, 'a); - serialize_i64(i64, serialize_f64, 'a); } fn serialize_i32(self, v: i32) -> JsResult<'a> { @@ -411,6 +412,28 @@ impl<'a, 'b, 'c> ser::Serializer for Serializer<'a, 'b, 'c> { Ok(v8::Integer::new_from_unsigned(&mut self.scope.borrow_mut(), v).into()) } + fn serialize_i64(self, v: i64) -> JsResult<'a> { + let s = &mut self.scope.borrow_mut(); + // If i64 can fit in max safe integer bounds then serialize as v8::Number + // otherwise serialize as v8::BigInt + if (MIN_SAFE_INTEGER..=MAX_SAFE_INTEGER).contains(&v) { + Ok(v8::Number::new(s, v as _).into()) + } else { + Ok(v8::BigInt::new_from_i64(s, v).into()) + } + } + + fn serialize_u64(self, v: u64) -> JsResult<'a> { + let s = &mut self.scope.borrow_mut(); + // If u64 can fit in max safe integer bounds then serialize as v8::Number + // otherwise serialize as v8::BigInt + if v <= (MAX_SAFE_INTEGER as u64) { + Ok(v8::Number::new(s, v as _).into()) + } else { + Ok(v8::BigInt::new_from_u64(s, v).into()) + } + } + fn serialize_f64(self, v: f64) -> JsResult<'a> { Ok(v8::Number::new(&mut self.scope.borrow_mut(), v).into()) } |