69 lines
1.4 KiB
Rust
69 lines
1.4 KiB
Rust
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use std::ops::{Deref, DerefMut};
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use std::ptr;
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use std::slice;
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use super::{JsObject, NapiValue, Value, ValueType};
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use crate::error::check_status;
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use crate::{sys, Result};
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#[derive(Clone, Copy, Debug)]
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pub struct JsBuffer {
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pub value: JsObject,
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pub data: *const u8,
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pub len: u64,
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}
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impl NapiValue for JsBuffer {
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fn raw_value(&self) -> sys::napi_value {
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self.value.0.value
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}
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fn from_raw(env: sys::napi_env, value: sys::napi_value) -> Result<Self> {
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let mut data = ptr::null_mut();
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let mut len: u64 = 0;
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let status = unsafe { sys::napi_get_buffer_info(env, value, &mut data, &mut len) };
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check_status(status)?;
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Ok(JsBuffer {
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value: JsObject(Value {
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env,
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value,
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value_type: ValueType::Object,
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}),
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data: data as *const u8,
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len,
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})
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}
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fn from_raw_unchecked(env: sys::napi_env, value: sys::napi_value) -> Self {
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Self {
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value: JsObject(Value {
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env,
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value,
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value_type: ValueType::Object,
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}),
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data: ptr::null(),
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len: 0,
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}
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}
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}
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impl AsRef<[u8]> for JsBuffer {
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fn as_ref(&self) -> &[u8] {
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self.deref()
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}
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}
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impl Deref for JsBuffer {
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type Target = [u8];
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fn deref(&self) -> &[u8] {
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unsafe { slice::from_raw_parts(self.data, self.len as usize) }
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}
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}
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impl DerefMut for JsBuffer {
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fn deref_mut(&mut self) -> &mut [u8] {
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unsafe { slice::from_raw_parts_mut(self.data as *mut _, self.len as usize) }
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}
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}
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