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优化NbtReader的read_int_array和read_long_array方法的实现

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This commit is contained in:
shenjack 2024-03-06 23:32:00 +08:00
parent 1c24b43762
commit 1dee92147d
Signed by: shenjack
GPG Key ID: 7B1134A979775551
1 changed files with 11 additions and 24 deletions
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35
shen-nbt5/src/lib.rs
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@ -61,6 +61,7 @@ impl NbtReader<'_> {
read!(read_u64, u64, 8);
read!(read_f32, f32, 4, false);
read!(read_f64, f64, 8, false);
pub fn read_u8_array(&mut self, len: usize) -> &[u8] {
let value = &self.data[self.cursor..self.cursor + len];
self.cursor += len;
@ -78,31 +79,17 @@ impl NbtReader<'_> {
self.cursor += len;
value.into_owned()
}
pub fn read_byte_array(&mut self, len: usize) -> Vec<i8> {
let value = self.data[self.cursor..self.cursor + len].to_vec();
self.cursor += len;
value
pub fn read_int_array(&mut self, len: usize) -> &[i32] {
let datas = self.read_u8_array(len * 4);
let value = unsafe {
std::slice::from_raw_parts(datas.as_ptr() as *const i32, len)
};
}
pub fn read_int_array(&mut self, len: usize) -> Vec<i32> {
let mut value = Vec::with_capacity(len);
for _ in 0..len {
value.push(self.read_i32());
}
value
}
pub fn read_long_array(&mut self, len: usize) -> Vec<i64> {
let mut value = Vec::with_capacity(len);
for _ in 0..len {
value.push(self.read_i64());
}
value
}
pub fn read_byte_array_array(&mut self, len: usize) -> Vec<Vec<i8>> {
let mut value = Vec::with_capacity(len);
for _ in 0..len {
value.push(self.read_byte_array(self.read_u8() as usize));
}
value
pub fn read_long_array(&mut self, len: usize) -> &[i64] {
let datas = self.read_u8_array(len * 8);
let value = unsafe {
std::slice::from_raw_parts(datas.as_ptr() as *const i64, len)
};
}
}