sq3-rs 0.1.8

SQLite reader with no dependencies
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

use crate::traits::{Name, ParseBytes};
use crate::{field_parsing_error, impl_name, result::SqliteResult};
use core::fmt::Debug;
const SQLITE3_FILE_FORMAT_MAGIC_STRING: [u8; 16] = [
    0x53, 0x51, 0x4c, 0x69, 0x74, 0x65, 0x20, 0x66, 0x6f, 0x72, 0x6d, 0x61, 0x74, 0x20, 0x33, 0x00,
];

/// # Magic Header String (16 Bytes)
///
///  Every valid Sqlite database file begins with the following
/// 16 bytes (in hex): `53 51 4c 69 74 65 20 66 6f 72 6d 61 74 20 33 00`.
/// This byte sequence corresponds to the UTF-8 string `Sqlite format 3`
/// including the nul terminator character at the end.
pub struct MagicHeaderString([u8; 16]);
impl Default for MagicHeaderString {
    fn default() -> Self {
        Self(SQLITE3_FILE_FORMAT_MAGIC_STRING)
    }
}
impl_name! {MagicHeaderString}

impl Debug for MagicHeaderString {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        f.debug_tuple(Self::NAME).finish()
    }
}

impl ParseBytes for MagicHeaderString {
    const LENGTH_BYTES: usize = 16;

    fn parsing_handler(bytes: &[u8]) -> SqliteResult<Self> {
        for (idx, byte) in SQLITE3_FILE_FORMAT_MAGIC_STRING.iter().enumerate() {
            if bytes.get(idx) != Some(byte) {
                return Err(field_parsing_error! {Self::NAME.into()});
            }
        }

        Ok(Self(SQLITE3_FILE_FORMAT_MAGIC_STRING))
    }
}