orientdb_client/common/protocol/
buffer.rs

1use crate::common::OrientResult;
2use byteorder::{BigEndian, WriteBytesExt};
3use std::io::Write;
4
5pub struct OBuffer {
6    inner: Vec<u8>,
7}
8
9impl Default for OBuffer {
10    fn default() -> Self {
11        OBuffer::new()
12    }
13}
14
15impl OBuffer {
16    pub fn new() -> OBuffer {
17        OBuffer { inner: Vec::new() }
18    }
19
20    pub fn as_slice(&self) -> &[u8] {
21        self.inner.as_slice()
22    }
23
24    pub fn put_i8(&mut self, n: i8) -> OrientResult<()> {
25        self.inner.write_i8(n)?;
26        Ok(())
27    }
28
29    pub fn put_u8(&mut self, n: u8) -> OrientResult<()> {
30        self.inner.write_u8(n)?;
31        Ok(())
32    }
33
34    pub fn put_i32(&mut self, n: i32) -> OrientResult<()> {
35        self.inner.write_i32::<BigEndian>(n)?;
36        Ok(())
37    }
38    pub fn put_i16(&mut self, n: i16) -> OrientResult<()> {
39        self.inner.write_i16::<BigEndian>(n)?;
40        Ok(())
41    }
42
43    pub fn put_slice(&mut self, src: &[u8]) -> OrientResult<()> {
44        self.inner.write_all(src)?;
45        Ok(())
46    }
47
48    pub fn write_str(&mut self, str: &str) -> OrientResult<()> {
49        let bytes = str.as_bytes();
50        let size = bytes.len();
51        self.put_i32(size as i32)?;
52        self.put_slice(bytes)?;
53        Ok(())
54    }
55    pub fn write_slice(&mut self, bytes: &[u8]) -> OrientResult<()> {
56        let size = bytes.len();
57        self.put_i32(size as i32)?;
58        self.put_slice(bytes)?;
59        Ok(())
60    }
61
62    pub fn write_bool(&mut self, boolean: bool) -> OrientResult<()> {
63        if boolean {
64            self.put_i8(1)
65        } else {
66            self.put_i8(0)
67        }?;
68        Ok(())
69    }
70
71    pub fn write_varint(&mut self, number: i64) -> OrientResult<()> {
72        let mut real_value: u64 = ((number << 1) ^ (number >> 63)) as u64;
73        while real_value & 0xFFFF_FFFF_FFFF_FF80 != 0 {
74            self.put_u8(((real_value & 0x7F) | 0x80) as u8)?;
75            real_value >>= 7;
76        }
77        self.put_u8((real_value & 0x7F) as u8)?;
78        Ok(())
79    }
80
81    pub fn write_string(&mut self, val: &str) -> OrientResult<()> {
82        self.write_varint(val.len() as i64)?;
83        self.put_slice(val.as_bytes())?;
84        Ok(())
85    }
86}
orientdb_client/common/protocol/buffer.rs

orientdb_client/common/protocol/
buffer.rs
