1use std::mem;
2use std::ops::{Deref, DerefMut};
3use std::ptr;
4
5use super::{Value, ValueType};
6use crate::bindgen_runtime::ValidateNapiValue;
7use crate::{
8 bindgen_runtime::TypeName, check_status, sys, Error, JsUnknown, NapiValue, Ref, Result, Status,
9};
10
11pub struct JsBuffer(pub(crate) Value);
12
13impl TypeName for JsBuffer {
14 fn type_name() -> &'static str {
15 "Buffer"
16 }
17
18 fn value_type() -> ValueType {
19 ValueType::Object
20 }
21}
22
23impl ValidateNapiValue for JsBuffer {
24 unsafe fn validate(env: sys::napi_env, napi_val: sys::napi_value) -> Result<sys::napi_value> {
25 let mut is_buffer: bool = false;
26 check_status!(unsafe { sys::napi_is_buffer(env, napi_val, &mut is_buffer) })?;
27 if !is_buffer {
28 return Err(Error::new(
29 Status::InvalidArg,
30 reason:"Value is not a buffer".to_owned(),
31 ));
32 }
33 Ok(ptr::null_mut())
34 }
35}
36
37pub struct JsBufferValue {
38 pub(crate) value: JsBuffer,
39 data: mem::ManuallyDrop<Vec<u8>>,
40}
41
42impl JsBuffer {
43 pub fn into_value(self) -> Result<JsBufferValue> {
44 let mut data: *mut c_void = ptr::null_mut();
45 let mut len: usize = 0;
46 check_status!(unsafe {
47 sys::napi_get_buffer_info(self.0.env, self.0.value, &mut data, &mut len)
48 })?;
49 Ok(JsBufferValue {
50 data: mem::ManuallyDrop::new(unsafe { Vec::from_raw_parts(ptr:data as *mut _, length:len, capacity:len) }),
51 value: self,
52 })
53 }
54
55 pub fn into_ref(self) -> Result<Ref<JsBufferValue>> {
56 Ref::new(self.0, ref_count:1, self.into_value()?)
57 }
58}
59
60impl JsBufferValue {
61 pub fn new(value: JsBuffer, data: mem::ManuallyDrop<Vec<u8>>) -> Self {
62 JsBufferValue { value, data }
63 }
64
65 pub fn into_raw(self) -> JsBuffer {
66 self.value
67 }
68
69 pub fn into_unknown(self) -> JsUnknown {
70 unsafe { JsUnknown::from_raw_unchecked(self.value.0.env, self.value.0.value) }
71 }
72}
73
74impl AsRef<[u8]> for JsBufferValue {
75 fn as_ref(&self) -> &[u8] {
76 self.data.as_slice()
77 }
78}
79
80impl AsMut<[u8]> for JsBufferValue {
81 fn as_mut(&mut self) -> &mut [u8] {
82 self.data.as_mut_slice()
83 }
84}
85
86impl Deref for JsBufferValue {
87 type Target = [u8];
88
89 fn deref(&self) -> &Self::Target {
90 self.data.as_slice()
91 }
92}
93
94impl DerefMut for JsBufferValue {
95 fn deref_mut(&mut self) -> &mut Self::Target {
96 self.data.as_mut_slice()
97 }
98}
99