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Copy pathsqlite.rs
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652 lines (606 loc) · 18.8 KB
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use std::convert::TryFrom;
use std::ffi::{CStr, CString};
use std::fmt;
use std::iter::FromIterator;
use std::mem;
use std::os::raw::c_char;
use std::ptr;
use std::sync::{Arc, Mutex};
use crate::redisql_error as err;
use crate::community_statement::Statement;
#[allow(dead_code)]
#[allow(non_snake_case)]
#[allow(non_camel_case_types)]
#[allow(non_upper_case_globals)]
#[allow(unknown_lints)]
pub mod ffi {
#![allow(clippy::all)]
include!(concat!(env!("OUT_DIR"), "/bindings_sqlite.rs"));
}
pub enum SQLiteOK {
OK,
}
impl FromIterator<SQLiteOK> for SQLiteOK {
fn from_iter<I: IntoIterator<Item = SQLiteOK>>(
_iter: I,
) -> SQLiteOK {
SQLiteOK::OK
}
}
#[derive(Clone)]
pub struct SQLite3Error {
pub code: u32,
pub error_message: String,
pub error_string: String,
}
impl fmt::Display for SQLite3Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"ERR - Error Code: {} => {} | {}",
self.code, self.error_string, self.error_message
)
}
}
impl fmt::Debug for SQLite3Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self)
}
}
impl err::RediSQLErrorTrait for SQLite3Error {}
struct RawConnection {
conn: *mut ffi::sqlite3,
flags: i32,
}
impl RawConnection {
pub fn new_serialize(path: &str) -> Result<Self, SQLite3Error> {
Self::new(path, Self::fullmutex_flags())
}
pub fn new_multithread(path: &str) -> Result<Self, SQLite3Error> {
Self::new(path, Self::nomutex_flags())
}
fn new(path: &str, flags: i32) -> Result<Self, SQLite3Error> {
let mut conn = std::mem::MaybeUninit::uninit();
let c_path = CString::new(path).unwrap();
let r = unsafe {
let ptr_path = c_path.as_ptr();
ffi::sqlite3_open_v2(
ptr_path,
conn.as_mut_ptr(),
flags,
ptr::null(),
)
};
let conn = unsafe { conn.assume_init() };
match r {
ffi::SQLITE_OK => Ok(RawConnection { conn, flags }),
_ => Err(unsafe {
get_last_error_from_db_connection(conn)
}),
}
}
fn nomutex_flags() -> i32 {
ffi::SQLITE_OPEN_URI
| ffi::SQLITE_OPEN_CREATE
| ffi::SQLITE_OPEN_READWRITE
| ffi::SQLITE_OPEN_NOMUTEX
}
fn fullmutex_flags() -> i32 {
ffi::SQLITE_OPEN_URI
| ffi::SQLITE_OPEN_CREATE
| ffi::SQLITE_OPEN_READWRITE
| ffi::SQLITE_OPEN_FULLMUTEX
}
pub fn is_multithread(&self) -> bool {
(self.flags & ffi::SQLITE_OPEN_NOMUTEX) != 0
}
pub fn is_serialized(&self) -> bool {
(self.flags & ffi::SQLITE_OPEN_FULLMUTEX) != 0
}
}
impl Drop for RawConnection {
fn drop(&mut self) {
unsafe {
ffi::sqlite3_close(self.conn);
}
}
}
pub trait SQLiteConnection {
fn get_db(&self) -> *mut ffi::sqlite3;
fn get_last_error(&self) -> SQLite3Error;
}
impl SQLiteConnection for Connection {
fn get_db(&self) -> *mut ffi::sqlite3 {
self.db.conn
}
fn get_last_error(&self) -> SQLite3Error {
unsafe { get_last_error_from_db_connection(self.get_db()) }
}
}
pub unsafe fn get_last_error_from_db_connection(
conn: *mut ffi::sqlite3,
) -> SQLite3Error {
let error_code = ffi::sqlite3_extended_errcode(conn);
let error_message = CStr::from_ptr(ffi::sqlite3_errmsg(conn))
.to_string_lossy()
.into_owned();
let error_string =
CStr::from_ptr(ffi::sqlite3_errstr(error_code))
.to_string_lossy()
.into_owned();
SQLite3Error {
code: error_code as u32,
error_message,
error_string,
}
}
pub struct Connection {
db: RawConnection,
pub path: String,
}
impl Connection {
pub fn open_connection(
path: &str,
) -> Result<Connection, SQLite3Error> {
let db = RawConnection::new_multithread(path)?;
Ok(Connection {
db,
path: String::from(path),
})
}
pub fn duplicate_connection(
&self,
) -> Result<Connection, SQLite3Error> {
let cn1 = RawConnection::new_serialize(&self.path)?;
let cn1 = Connection {
db: cn1,
path: String::from(&self.path),
};
Ok(cn1)
}
pub fn is_serialized(&self) -> bool {
self.db.is_serialized()
}
pub fn is_multithread(&self) -> bool {
self.db.is_multithread()
}
}
pub fn get_arc_connection(
path: &str,
) -> Result<Arc<Mutex<Connection>>, SQLite3Error> {
let raw = Connection::open_connection(path)?;
Ok(Arc::new(Mutex::new(raw)))
}
pub trait StatementTrait<'a>: Sized {
fn new(
conn: Arc<Mutex<Connection>>,
query: &str,
) -> Result<Self, SQLite3Error>;
fn reset(&self);
fn execute(&self) -> Result<Cursor, SQLite3Error>;
fn bind_texts(
&self,
values: &[&str],
) -> Result<SQLiteOK, SQLite3Error>;
fn bind_index(
&self,
index: i32,
value: &str,
) -> Result<SQLiteOK, SQLite3Error>;
fn is_read_only(&self) -> bool {
false
}
fn parameters_count(&self) -> u32;
fn sql(&self) -> String;
}
enum EntityType {
Integer,
Float,
Text,
Blob,
Null,
}
// TODO XXX explore it is possible to change these String into &str
// and then use Copy instead of Clone
#[derive(Clone, Debug)]
pub enum Entity {
Integer { int: i64 },
Float { float: f64 },
Text { text: String },
Blob { blob: String },
Null,
OK {},
DONE { modified_rows: i32 },
}
impl Entity {
pub fn new(stmt: &Statement, i: i32) -> Entity {
match get_entity_type(stmt.as_ptr(), i) {
EntityType::Integer => {
let int = unsafe {
ffi::sqlite3_column_int64(stmt.as_ptr(), i)
};
Entity::Integer { int }
}
EntityType::Float => {
let value = unsafe {
ffi::sqlite3_column_double(stmt.as_ptr(), i)
};
Entity::Float { float: value }
}
EntityType::Text => {
let value = unsafe {
CStr::from_ptr(ffi::sqlite3_column_text(
stmt.as_ptr(),
i,
)
as *const c_char)
.to_string_lossy()
.into_owned()
};
Entity::Text { text: value }
}
EntityType::Blob => {
let value = unsafe {
CStr::from_ptr(ffi::sqlite3_column_blob(
stmt.as_ptr(),
i,
)
as *const c_char)
.to_string_lossy()
.into_owned()
};
Entity::Blob { blob: value }
}
EntityType::Null => Entity::Null {},
}
}
}
pub enum Cursor {
OKCursor,
DONECursor {
modified_rows: i32,
},
RowsCursor {
num_columns: i32,
previous_status: i32,
stmt: Statement,
modified_rows: i32,
},
/* ADD empty cursor, it will be the easiest (and maybe
* cleaner?) way to manage empty return statements */
}
impl<'a> FromIterator<Cursor> for Cursor {
fn from_iter<I: IntoIterator<Item = Cursor>>(
cursors: I,
) -> Cursor {
let mut modified = 0;
let mut last: Option<Cursor> = None;
for cursor in cursors {
match cursor {
Cursor::OKCursor {} => {
debug!("FromIterator => OKCursor");
}
Cursor::DONECursor { modified_rows } => {
debug!("FromIterator => DONECursor");
modified += modified_rows;
}
Cursor::RowsCursor { .. } => {
debug!("FromIterator => RowsCursor");
}
}
last = Some(cursor);
}
match last {
None => Cursor::DONECursor {
modified_rows: modified,
},
Some(cursor) => cursor,
}
}
}
fn get_entity_type(
stmt: *mut ffi::sqlite3_stmt,
i: i32,
) -> EntityType {
let entity_type = unsafe { ffi::sqlite3_column_type(stmt, i) };
match entity_type {
ffi::SQLITE_INTEGER => EntityType::Integer,
ffi::SQLITE_FLOAT => EntityType::Float,
ffi::SQLITE_TEXT => EntityType::Text,
ffi::SQLITE_BLOB => EntityType::Blob,
ffi::SQLITE_NULL => EntityType::Null,
_ => EntityType::Null,
}
}
pub enum QueryResult {
OK {},
DONE {
modified_rows: i32,
},
Array {
names: Vec<String>,
types: Vec<&'static str>,
array: Vec<Entity>,
},
Stream {
stream: String,
first_id: String,
last_id: String,
size: u32,
},
}
fn type_to_string(t: i32) -> &'static str {
match t {
ffi::SQLITE_INTEGER => "INT",
ffi::SQLITE_FLOAT => "FLOAT",
ffi::SQLITE_TEXT => "TEXT",
ffi::SQLITE_BLOB => "BLOB",
ffi::SQLITE_NULL => "NULL",
_ => "NULL",
}
}
impl QueryResult {
pub fn from_cursor_before(
mut cursor: Cursor,
timeout: std::time::Instant,
) -> Result<Self, err::RediSQLError> {
let now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
match cursor {
Cursor::OKCursor {} => Ok(QueryResult::OK {}),
Cursor::DONECursor { modified_rows } => {
Ok(QueryResult::DONE { modified_rows })
}
Cursor::RowsCursor {
ref stmt,
num_columns,
ref mut previous_status,
..
} => {
let mut now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
let mut result = vec![];
let mut names =
Vec::with_capacity(num_columns as usize);
let mut types =
Vec::with_capacity(num_columns as usize);
for i in 0..num_columns {
let name = unsafe {
CStr::from_ptr(ffi::sqlite3_column_name(
stmt.as_ptr(),
i,
))
.to_string_lossy()
.into_owned()
};
names.push(name);
let t = type_to_string(unsafe {
ffi::sqlite3_column_type(stmt.as_ptr(), i)
});
types.push(t);
}
while *previous_status == ffi::SQLITE_ROW {
now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
for i in 0..num_columns {
let entity_value = Entity::new(stmt, i);
result.push(entity_value);
}
unsafe {
*previous_status =
ffi::sqlite3_step(stmt.as_ptr());
};
}
match *previous_status {
ffi::SQLITE_INTERRUPT => {
Err(err::RediSQLError::new("Query Interrupted".to_string(), "The query was interrupted, most likely because it runs out of time.".to_string()))
},
_ => Ok(QueryResult::Array {
names,
array: result,
types,
}),
}
}
}
}
pub fn from_cursor_before_with_header(
mut cursor: Cursor,
timeout: std::time::Instant,
) -> Result<Self, err::RediSQLError> {
let now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
match cursor {
Cursor::OKCursor {} => Ok(QueryResult::OK {}),
Cursor::DONECursor { modified_rows } => {
Ok(QueryResult::DONE { modified_rows })
}
Cursor::RowsCursor {
ref stmt,
num_columns,
ref mut previous_status,
..
} => {
let mut now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
let mut result = vec![];
let mut names =
Vec::with_capacity(num_columns as usize);
let mut types =
Vec::with_capacity(num_columns as usize);
for i in 0..num_columns {
let name = unsafe {
CStr::from_ptr(ffi::sqlite3_column_name(
stmt.as_ptr(),
i,
))
.to_string_lossy()
.into_owned()
};
names.push(name.clone());
result.push(Entity::Text { text: name });
}
for i in 0..num_columns {
let t = type_to_string(unsafe {
ffi::sqlite3_column_type(stmt.as_ptr(), i)
});
types.push(t);
result.push(Entity::Text {
text: t.to_string(),
});
}
while *previous_status == ffi::SQLITE_ROW {
now = std::time::Instant::now();
if now > timeout {
return Err(err::RediSQLError::timeout());
}
for i in 0..num_columns {
let entity_value = Entity::new(stmt, i);
result.push(entity_value);
}
unsafe {
*previous_status =
ffi::sqlite3_step(stmt.as_ptr());
};
}
match *previous_status {
ffi::SQLITE_INTERRUPT => {
Err(err::RediSQLError::new("Query Interrupted".to_string(), "The query was interrupted, most likely because it runs out of time.".to_string()))
},
_ => Ok(QueryResult::Array {
names,
array: result,
types,
}),
}
}
}
}
}
impl TryFrom<Cursor> for QueryResult {
type Error = err::RediSQLError;
fn try_from(
mut cursor: Cursor,
) -> Result<QueryResult, Self::Error> {
match cursor {
Cursor::OKCursor {} => Ok(QueryResult::OK {}),
Cursor::DONECursor { modified_rows } => {
Ok(QueryResult::DONE { modified_rows })
}
Cursor::RowsCursor {
ref stmt,
num_columns,
ref mut previous_status,
..
} => {
let mut result = vec![];
let mut names =
Vec::with_capacity(num_columns as usize);
let mut types =
Vec::with_capacity(num_columns as usize);
for i in 0..num_columns {
let name = unsafe {
CStr::from_ptr(ffi::sqlite3_column_name(
stmt.as_ptr(),
i,
))
.to_string_lossy()
.into_owned()
};
names.push(name);
let t = type_to_string(unsafe {
ffi::sqlite3_column_type(stmt.as_ptr(), i)
});
types.push(t);
}
while *previous_status == ffi::SQLITE_ROW {
for i in 0..num_columns {
let entity_value = Entity::new(stmt, i);
result.push(entity_value);
}
unsafe {
*previous_status =
ffi::sqlite3_step(stmt.as_ptr());
};
}
match *previous_status {
ffi::SQLITE_INTERRUPT => {
Err(Self::Error::new("Query Interrupted".to_string(), "The query was interrupted, most likely because it runs out of time.".to_string()))
},
_ => Ok(QueryResult::Array {
names,
array: result,
types,
}),
}
}
}
}
}
pub struct Backup {
bk: *mut ffi::sqlite3_backup,
}
impl Backup {
fn as_ptr(&self) -> *mut ffi::sqlite3_backup {
self.bk
}
}
pub fn create_backup(
src: &Connection,
dest: &Connection,
) -> Result<Backup, SQLite3Error> {
let dest_name = CString::new("main").unwrap();
let src_name = CString::new("main").unwrap();
let result = unsafe {
ffi::sqlite3_backup_init(
dest.get_db(),
dest_name.as_ptr(),
src.get_db(),
src_name.as_ptr(),
)
};
match result {
null if null.is_null() => Err(dest.get_last_error()),
ptr => Ok(Backup { bk: ptr }),
}
}
// TODO XXX finish work here
#[allow(non_snake_case, clippy::missing_safety_doc)]
pub unsafe fn BackupStep(bk: &Backup, steps: i32) -> i32 {
ffi::sqlite3_backup_step(bk.as_ptr(), steps)
}
#[allow(non_snake_case, clippy::missing_safety_doc)]
pub unsafe fn BackupFinish(bk: &Backup) -> i32 {
ffi::sqlite3_backup_finish(bk.as_ptr())
}
pub fn backup_step_is_ok(result: i32) -> bool {
result == ffi::SQLITE_OK
}
pub fn backup_step_should_retry(result: i32) -> bool {
result == ffi::SQLITE_BUSY || result == ffi::SQLITE_LOCKED
}
pub fn backup_should_step_again(result: i32) -> bool {
backup_step_is_ok(result) || backup_step_should_retry(result)
}
pub fn backup_complete_with_done(result: i32) -> bool {
result == ffi::SQLITE_DONE
}
pub fn disable_global_memory_statistics() {
unsafe {
ffi::sqlite3_config(ffi::SQLITE_CONFIG_MEMSTATUS, 0);
}
}
#[allow(non_snake_case)]
pub fn SQLITE_TRANSIENT() -> ffi::sqlite3_destructor_type {
Some(unsafe { mem::transmute(-1isize) })
}