use crate::common::OrientResult;
use byteorder::{BigEndian, WriteBytesExt};
use std::io::Write;
pub struct OBuffer {
inner: Vec<u8>,
}
impl Default for OBuffer {
fn default() -> Self {
OBuffer::new()
}
}
impl OBuffer {
pub fn new() -> OBuffer {
OBuffer { inner: Vec::new() }
}
pub fn as_slice(&self) -> &[u8] {
self.inner.as_slice()
}
pub fn put_i8(&mut self, n: i8) -> OrientResult<()> {
self.inner.write_i8(n)?;
Ok(())
}
pub fn put_u8(&mut self, n: u8) -> OrientResult<()> {
self.inner.write_u8(n)?;
Ok(())
}
pub fn put_i32(&mut self, n: i32) -> OrientResult<()> {
self.inner.write_i32::<BigEndian>(n)?;
Ok(())
}
pub fn put_i16(&mut self, n: i16) -> OrientResult<()> {
self.inner.write_i16::<BigEndian>(n)?;
Ok(())
}
pub fn put_slice(&mut self, src: &[u8]) -> OrientResult<()> {
self.inner.write_all(src)?;
Ok(())
}
pub fn write_str(&mut self, str: &str) -> OrientResult<()> {
let bytes = str.as_bytes();
let size = bytes.len();
self.put_i32(size as i32)?;
self.put_slice(bytes)?;
Ok(())
}
pub fn write_slice(&mut self, bytes: &[u8]) -> OrientResult<()> {
let size = bytes.len();
self.put_i32(size as i32)?;
self.put_slice(bytes)?;
Ok(())
}
pub fn write_bool(&mut self, boolean: bool) -> OrientResult<()> {
if boolean {
self.put_i8(1)
} else {
self.put_i8(0)
}?;
Ok(())
}
pub fn write_varint(&mut self, number: i64) -> OrientResult<()> {
let mut real_value: u64 = ((number << 1) ^ (number >> 63)) as u64;
while real_value & 0xFFFF_FFFF_FFFF_FF80 != 0 {
self.put_u8(((real_value & 0x7F) | 0x80) as u8)?;
real_value >>= 7;
}
self.put_u8((real_value & 0x7F) as u8)?;
Ok(())
}
pub fn write_string(&mut self, val: &str) -> OrientResult<()> {
self.write_varint(val.len() as i64)?;
self.put_slice(val.as_bytes())?;
Ok(())
}
}