Method read_var_u32

rust/fory-core/src/buffer.rs:743–775

(&mut self)

    #[inline(always)]
    pub fn read_var_u32(&mut self) -> Result<u32, Error> {
        let b0 = self.value_at(self.cursor)? as u32;
        if b0 < 0x80 {
            self.move_next(1);
            return Ok(b0);
        }

        let b1 = self.value_at(self.cursor + 1)? as u32;
        let mut encoded = (b0 & 0x7F) | ((b1 & 0x7F) << 7);
        if b1 < 0x80 {
            self.move_next(2);
            return Ok(encoded);
        }

        let b2 = self.value_at(self.cursor + 2)? as u32;
        encoded |= (b2 & 0x7F) << 14;
        if b2 < 0x80 {
            self.move_next(3);
            return Ok(encoded);
        }

        let b3 = self.value_at(self.cursor + 3)? as u32;
        encoded |= (b3 & 0x7F) << 21;
        if b3 < 0x80 {
            self.move_next(4);
            return Ok(encoded);
        }

        let b4 = self.value_at(self.cursor + 4)? as u32;
        encoded |= b4 << 28;
        self.move_next(5);
        Ok(encoded)
    }

    // ============ UINT64 (TypeId = 13) ============