weld_codegen/
writer.rs

1use crate::BytesMut;
2
3#[derive(Default)]
4pub struct Writer {
5    writer: BytesMut,
6}
7
8impl Writer {
9    #[inline]
10    pub fn write<B: ToBytes>(&mut self, bytes: B) {
11        self.writer.extend_from_slice(bytes.to_bytes());
12    }
13
14    /// Returns the current buffer, zeroing out self
15    pub fn take(&mut self) -> BytesMut {
16        self.writer.split_to(self.writer.len())
17    }
18
19    /// Returns current position
20    pub fn pos(&self) -> usize {
21        self.writer.len()
22    }
23
24    /// Returns slice from writer
25    pub fn get_slice(&self, start_pos: usize, end_pos: usize) -> &[u8] {
26        &self.writer[start_pos..end_pos]
27    }
28}
29
30pub trait ToBytes {
31    fn to_bytes(&self) -> &[u8];
32}
33impl ToBytes for &str {
34    fn to_bytes(&self) -> &[u8] {
35        self.as_bytes()
36    }
37}
38impl ToBytes for &String {
39    fn to_bytes(&self) -> &[u8] {
40        self.as_bytes()
41    }
42}
43impl ToBytes for &[u8] {
44    fn to_bytes(&self) -> &[u8] {
45        self
46    }
47}
48impl ToBytes for BytesMut {
49    fn to_bytes(&self) -> &[u8] {
50        self.as_ref()
51    }
52}
53
54impl std::fmt::Write for Writer {
55    fn write_str(&mut self, s: &str) -> std::fmt::Result {
56        self.write(s.as_bytes());
57        Ok(())
58    }
59
60    fn write_char(&mut self, c: char) -> std::fmt::Result {
61        let mut chars = [0u8; 4];
62        let s = c.encode_utf8(&mut chars);
63        self.write(s.as_bytes());
64        Ok(())
65    }
66}
67
68impl<const N: usize> ToBytes for &[u8; N] {
69    fn to_bytes(&self) -> &[u8] {
70        self.as_slice()
71    }
72}
weld_codegen/writer.rs

weld_codegen/
writer.rs
