Clean code

Typos, deprecated code usages, ...

libsqlite3-sys/build.rs

@@ -8,14 +8,14 @@ use std::path::Path;
 /// targetting, and this test must be made at run-time (of the build script) See
 /// https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts
 fn win_target() -> bool {
-    std::env::var("CARGO_CFG_WINDOWS").is_ok()
+    env::var("CARGO_CFG_WINDOWS").is_ok()
 }
 
 /// Tells whether we're building for Android.
 /// See [`win_target`]
 #[cfg(any(feature = "bundled", feature = "bundled-windows"))]
 fn android_target() -> bool {
-    std::env::var("CARGO_CFG_TARGET_OS").map_or(false, |v| v == "android")
+    env::var("CARGO_CFG_TARGET_OS").map_or(false, |v| v == "android")
 }
 
 /// Tells whether a given compiler will be used `compiler_name` is compared to
@@ -23,7 +23,7 @@ fn android_target() -> bool {
 ///
 /// See [`win_target`]
 fn is_compiler(compiler_name: &str) -> bool {
-    std::env::var("CARGO_CFG_TARGET_ENV").map_or(false, |v| v == compiler_name)
+    env::var("CARGO_CFG_TARGET_ENV").map_or(false, |v| v == compiler_name)
 }
 
 fn main() {
@@ -178,7 +178,7 @@ mod build_bundled {
             };
 
             if cfg!(feature = "bundled-sqlcipher-vendored-openssl") {
-                cfg.include(std::env::var("DEP_OPENSSL_INCLUDE").unwrap());
+                cfg.include(env::var("DEP_OPENSSL_INCLUDE").unwrap());
                 // cargo will resolve downstream to the static lib in
                 // openssl-sys
             } else if is_windows {
@@ -505,7 +505,7 @@ mod bindings {
 
     impl ParseCallbacks for SqliteTypeChooser {
         fn int_macro(&self, _name: &str, value: i64) -> Option<IntKind> {
-            if value >= i32::min_value() as i64 && value <= i32::max_value() as i64 {
+            if value >= i32::MIN as i64 && value <= i32::MAX as i64 {
                 Some(IntKind::I32)
             } else {
                 None

src/context.rs

@@ -43,7 +43,7 @@ pub(super) unsafe fn set_result(ctx: *mut sqlite3_context, result: &ToSqlOutput<
         ValueRef::Real(r) => ffi::sqlite3_result_double(ctx, r),
         ValueRef::Text(s) => {
             let length = s.len();
-            if length > c_int::max_value() as usize {
+            if length > c_int::MAX as usize {
                 ffi::sqlite3_result_error_toobig(ctx);
             } else {
                 let (c_str, len, destructor) = match str_for_sqlite(s) {
@@ -57,7 +57,7 @@ pub(super) unsafe fn set_result(ctx: *mut sqlite3_context, result: &ToSqlOutput<
         }
         ValueRef::Blob(b) => {
             let length = b.len();
-            if length > c_int::max_value() as usize {
+            if length > c_int::MAX as usize {
                 ffi::sqlite3_result_error_toobig(ctx);
             } else if length == 0 {
                 ffi::sqlite3_result_zeroblob(ctx, 0);

src/error.rs

@@ -34,7 +34,7 @@ pub enum Error {
 
     /// Error converting a string to a C-compatible string because it contained
     /// an embedded nul.
-    NulError(::std::ffi::NulError),
+    NulError(std::ffi::NulError),
 
     /// Error when using SQL named parameters and passing a parameter name not
     /// present in the SQL.
@@ -212,14 +212,14 @@ impl From<str::Utf8Error> for Error {
     }
 }
 
-impl From<::std::ffi::NulError> for Error {
+impl From<std::ffi::NulError> for Error {
     #[cold]
-    fn from(err: ::std::ffi::NulError) -> Error {
+    fn from(err: std::ffi::NulError) -> Error {
         Error::NulError(err)
     }
 }
 
-const UNKNOWN_COLUMN: usize = std::usize::MAX;
+const UNKNOWN_COLUMN: usize = usize::MAX;
 
 /// The conversion isn't precise, but it's convenient to have it
 /// to allow use of `get_raw(…).as_…()?` in callbacks that take `Error`.
@@ -438,7 +438,7 @@ pub unsafe fn error_with_offset(db: *mut ffi::sqlite3, code: c_int, sql: &str) -
 
 pub fn check(code: c_int) -> Result<()> {
     if code != crate::ffi::SQLITE_OK {
-        Err(crate::error::error_from_sqlite_code(code, None))
+        Err(error_from_sqlite_code(code, None))
     } else {
         Ok(())
     }

src/functions.rs

@@ -637,7 +637,7 @@ unsafe extern "C" fn call_boxed_step<A, D, T>(
     D: Aggregate<A, T>,
     T: ToSql,
 {
-    let pac = if let Some(pac) = aggregate_context(ctx, ::std::mem::size_of::<*mut A>()) {
+    let pac = if let Some(pac) = aggregate_context(ctx, std::mem::size_of::<*mut A>()) {
         pac
     } else {
         ffi::sqlite3_result_error_nomem(ctx);
@@ -684,7 +684,7 @@ unsafe extern "C" fn call_boxed_inverse<A, W, T>(
     W: WindowAggregate<A, T>,
     T: ToSql,
 {
-    let pac = if let Some(pac) = aggregate_context(ctx, ::std::mem::size_of::<*mut A>()) {
+    let pac = if let Some(pac) = aggregate_context(ctx, std::mem::size_of::<*mut A>()) {
         pac
     } else {
         ffi::sqlite3_result_error_nomem(ctx);
@@ -807,7 +807,6 @@ where
 #[cfg(test)]
 mod test {
     use regex::Regex;
-    use std::f64::EPSILON;
     use std::os::raw::c_double;
 
     #[cfg(feature = "window")]
@@ -832,7 +831,7 @@ mod test {
         )?;
         let result: Result<f64> = db.query_row("SELECT half(6)", [], |r| r.get(0));
 
-        assert!((3f64 - result?).abs() < EPSILON);
+        assert!((3f64 - result?).abs() < f64::EPSILON);
         Ok(())
     }
 
@@ -846,7 +845,7 @@ mod test {
             half,
         )?;
         let result: Result<f64> = db.query_row("SELECT half(6)", [], |r| r.get(0));
-        assert!((3f64 - result?).abs() < EPSILON);
+        assert!((3f64 - result?).abs() < f64::EPSILON);
 
         db.remove_function("half", 1)?;
         let result: Result<f64> = db.query_row("SELECT half(6)", [], |r| r.get(0));

src/hooks.rs

@@ -37,7 +37,7 @@ impl From<i32> for Action {
     }
 }
 
-/// The context recieved by an authorizer hook.
+/// The context received by an authorizer hook.
 ///
 /// See <https://sqlite.org/c3ref/set_authorizer.html> for more info.
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]

src/inner_connection.rs

@@ -25,11 +25,11 @@ pub struct InnerConnection {
     // interrupt would only acquire the lock after the query's completion.
     interrupt_lock: Arc<Mutex<*mut ffi::sqlite3>>,
     #[cfg(feature = "hooks")]
-    pub free_commit_hook: Option<unsafe fn(*mut ::std::os::raw::c_void)>,
+    pub free_commit_hook: Option<unsafe fn(*mut std::os::raw::c_void)>,
     #[cfg(feature = "hooks")]
-    pub free_rollback_hook: Option<unsafe fn(*mut ::std::os::raw::c_void)>,
+    pub free_rollback_hook: Option<unsafe fn(*mut std::os::raw::c_void)>,
     #[cfg(feature = "hooks")]
-    pub free_update_hook: Option<unsafe fn(*mut ::std::os::raw::c_void)>,
+    pub free_update_hook: Option<unsafe fn(*mut std::os::raw::c_void)>,
     #[cfg(feature = "hooks")]
     pub progress_handler: Option<Box<dyn FnMut() -> bool + Send>>,
     #[cfg(feature = "hooks")]
@@ -208,7 +208,7 @@ impl InnerConnection {
             Ok(())
         } else {
             let message = super::errmsg_to_string(errmsg);
-            ffi::sqlite3_free(errmsg.cast::<::std::os::raw::c_void>());
+            ffi::sqlite3_free(errmsg.cast::<std::os::raw::c_void>());
             Err(error_from_sqlite_code(r, Some(message)))
         }
     }
@@ -400,7 +400,7 @@ fn ensure_safe_sqlite_threading_mode() -> Result<()> {
 
 #[cfg(not(any(target_arch = "wasm32")))]
 fn ensure_safe_sqlite_threading_mode() -> Result<()> {
-    // Ensure SQLite was compiled in thredsafe mode.
+    // Ensure SQLite was compiled in threadsafe mode.
     if unsafe { ffi::sqlite3_threadsafe() == 0 } {
         return Err(Error::SqliteSingleThreadedMode);
     }

src/lib.rs

@@ -57,7 +57,6 @@
 pub use libsqlite3_sys as ffi;
 
 use std::cell::RefCell;
-use std::convert;
 use std::default::Default;
 use std::ffi::{CStr, CString};
 use std::fmt;
@@ -272,7 +271,7 @@ fn str_for_sqlite(s: &[u8]) -> Result<(*const c_char, c_int, ffi::sqlite3_destru
 // Helper to cast to c_int safely, returning the correct error type if the cast
 // failed.
 fn len_as_c_int(len: usize) -> Result<c_int> {
-    if len >= (c_int::max_value() as usize) {
+    if len >= (c_int::MAX as usize) {
         Err(Error::SqliteFailure(
             ffi::Error::new(ffi::SQLITE_TOOBIG),
             None,
@@ -323,7 +322,7 @@ pub const TEMP_DB: DatabaseName<'static> = DatabaseName::Temp;
 ))]
 impl DatabaseName<'_> {
     #[inline]
-    fn as_cstring(&self) -> Result<util::SmallCString> {
+    fn as_cstring(&self) -> Result<SmallCString> {
         use self::DatabaseName::{Attached, Main, Temp};
         match *self {
             Main => str_to_cstring("main"),
@@ -724,7 +723,7 @@ impl Connection {
     where
         P: Params,
         F: FnOnce(&Row<'_>) -> Result<T, E>,
-        E: convert::From<Error>,
+        E: From<Error>,
     {
         let mut stmt = self.prepare(sql)?;
         stmt.check_no_tail()?;
@@ -1434,8 +1433,9 @@ mod test {
     fn test_execute_select() {
         let db = checked_memory_handle();
         let err = db.execute("SELECT 1 WHERE 1 < ?", [1i32]).unwrap_err();
-        assert!(
+        assert_eq!(
-            err == Error::ExecuteReturnedResults,
+            err,
+            Error::ExecuteReturnedResults,
             "Unexpected error: {}",
             err
         );
@@ -1739,7 +1739,7 @@ mod test {
         db.create_scalar_function(
             "interrupt",
             0,
-            crate::functions::FunctionFlags::default(),
+            functions::FunctionFlags::default(),
             move |_| {
                 interrupt_handle.interrupt();
                 Ok(0)
@@ -2121,7 +2121,7 @@ mod test {
     #[cfg(feature = "modern_sqlite")]
     pub fn db_readonly() -> Result<()> {
         let db = Connection::open_in_memory()?;
-        assert!(!db.is_readonly(super::MAIN_DB)?);
+        assert!(!db.is_readonly(MAIN_DB)?);
         Ok(())
     }
 }

src/params.rs

@@ -41,7 +41,7 @@ use sealed::Sealed;
 /// - Using the [`rusqlite::params!`](crate::params!) macro, e.g.
 ///   `thing.query(rusqlite::params![1, "foo", bar])`. This is mostly useful for
 ///   heterogeneous lists where the number of parameters greater than 16, or
-///   homogenous lists of paramters where the number of parameters exceeds 32.
+///   homogenous lists of parameters where the number of parameters exceeds 32.
 ///
 /// - For small homogeneous lists of parameters, they can either be passed as:
 ///

src/raw_statement.rs

@@ -110,7 +110,7 @@ impl RawStatement {
     #[cfg(feature = "unlock_notify")]
     pub fn step(&self) -> c_int {
         use crate::unlock_notify;
-        let mut db = core::ptr::null_mut::<ffi::sqlite3>();
+        let mut db = ptr::null_mut::<ffi::sqlite3>();
         loop {
             unsafe {
                 let mut rc = ffi::sqlite3_step(self.ptr);

src/row.rs

@@ -171,7 +171,7 @@ pub struct AndThenRows<'stmt, F> {
 
 impl<T, E, F> Iterator for AndThenRows<'_, F>
 where
-    E: convert::From<Error>,
+    E: From<Error>,
     F: FnMut(&Row<'_>) -> Result<T, E>,
 {
     type Item = Result<T, E>;

src/session.rs

@@ -168,7 +168,7 @@ impl Session<'_> {
             if r != ffi::SQLITE_OK {
                 let errmsg: *mut c_char = errmsg;
                 let message = errmsg_to_string(&*errmsg);
-                ffi::sqlite3_free(errmsg as *mut ::std::os::raw::c_void);
+                ffi::sqlite3_free(errmsg as *mut c_void);
                 return Err(error_from_sqlite_code(r, Some(message)));
             }
         }

src/statement.rs

@@ -3,7 +3,7 @@ use std::os::raw::{c_int, c_void};
 #[cfg(feature = "array")]
 use std::rc::Rc;
 use std::slice::from_raw_parts;
-use std::{convert, fmt, mem, ptr, str};
+use std::{fmt, mem, ptr, str};
 
 use super::ffi;
 use super::{len_as_c_int, str_for_sqlite};
@@ -417,7 +417,7 @@ impl Statement<'_> {
     pub fn query_and_then<T, E, P, F>(&mut self, params: P, f: F) -> Result<AndThenRows<'_, F>>
     where
         P: Params,
-        E: convert::From<Error>,
+        E: From<Error>,
         F: FnMut(&Row<'_>) -> Result<T, E>,
     {
         self.query(params).map(|rows| rows.and_then(f))
@@ -447,7 +447,7 @@ impl Statement<'_> {
         f: F,
     ) -> Result<AndThenRows<'_, F>>
     where
-        E: convert::From<Error>,
+        E: From<Error>,
         F: FnMut(&Row<'_>) -> Result<T, E>,
     {
         self.query_and_then(params, f)

src/transaction.rs

@@ -559,7 +559,7 @@ mod test {
         }
         Ok(())
     }
-    fn assert_nested_tx_error(e: crate::Error) {
+    fn assert_nested_tx_error(e: Error) {
         if let Error::SqliteFailure(e, Some(m)) = &e {
             assert_eq!(e.extended_code, crate::ffi::SQLITE_ERROR);
             // FIXME: Not ideal...

src/types/from_sql.rs

@@ -240,7 +240,7 @@ mod test {
 
         fn check_ranges<T>(db: &Connection, out_of_range: &[i64], in_range: &[i64])
         where
-            T: Into<i64> + FromSql + ::std::fmt::Debug,
+            T: Into<i64> + FromSql + std::fmt::Debug,
         {
             for n in out_of_range {
                 let err = db

src/types/mod.rs

@@ -140,7 +140,6 @@ impl fmt::Display for Type {
 mod test {
     use super::Value;
     use crate::{params, Connection, Error, Result, Statement};
-    use std::f64::EPSILON;
     use std::os::raw::{c_double, c_int};
 
     fn checked_memory_handle() -> Result<Connection> {
@@ -264,7 +263,7 @@ mod test {
         assert_eq!(vec![1, 2], row.get::<_, Vec<u8>>(0)?);
         assert_eq!("text", row.get::<_, String>(1)?);
         assert_eq!(1, row.get::<_, c_int>(2)?);
-        assert!((1.5 - row.get::<_, c_double>(3)?).abs() < EPSILON);
+        assert!((1.5 - row.get::<_, c_double>(3)?).abs() < f64::EPSILON);
         assert_eq!(row.get::<_, Option<c_int>>(4)?, None);
         assert_eq!(row.get::<_, Option<c_double>>(4)?, None);
         assert_eq!(row.get::<_, Option<String>>(4)?, None);
@@ -355,7 +354,7 @@ mod test {
         assert_eq!(Value::Text(String::from("text")), row.get::<_, Value>(1)?);
         assert_eq!(Value::Integer(1), row.get::<_, Value>(2)?);
         match row.get::<_, Value>(3)? {
-            Value::Real(val) => assert!((1.5 - val).abs() < EPSILON),
+            Value::Real(val) => assert!((1.5 - val).abs() < f64::EPSILON),
             x => panic!("Invalid Value {:?}", x),
         }
         assert_eq!(Value::Null, row.get::<_, Value>(4)?);

src/types/to_sql.rs

@@ -363,7 +363,6 @@ mod test {
     #[test]
     fn test_i128() -> crate::Result<()> {
         use crate::Connection;
-        use std::i128;
         let db = Connection::open_in_memory()?;
         db.execute_batch("CREATE TABLE foo (i128 BLOB, desc TEXT)")?;
         db.execute(

src/util/small_cstr.rs

@@ -5,7 +5,7 @@ use std::ffi::{CStr, CString, NulError};
 /// small enough. Also guarantees it's input is UTF-8 -- used for cases where we
 /// need to pass a NUL-terminated string to SQLite, and we have a `&str`.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
-pub(crate) struct SmallCString(smallvec::SmallVec<[u8; 16]>);
+pub(crate) struct SmallCString(SmallVec<[u8; 16]>);
 
 impl SmallCString {
     #[inline]

src/vtab/csvtab.rs

@@ -11,7 +11,7 @@
 //!     // Note: This should be done once (usually when opening the DB).
 //!     let db = Connection::open_in_memory()?;
 //!     rusqlite::vtab::csvtab::load_module(&db)?;
-//!     // Assum3e my_csv.csv
+//!     // Assume my_csv.csv
 //!     let schema = "
 //!         CREATE VIRTUAL TABLE my_csv_data
 //!         USING csv(filename = 'my_csv.csv')

src/vtab/mod.rs

@@ -963,7 +963,7 @@ where
         .map(|&cs| CStr::from_ptr(cs).to_bytes()) // FIXME .to_str() -> Result<&str, Utf8Error>
         .collect::<Vec<_>>();
     match T::create(&mut conn, aux.as_ref(), &vec[..]) {
-        Ok((sql, vtab)) => match ::std::ffi::CString::new(sql) {
+        Ok((sql, vtab)) => match std::ffi::CString::new(sql) {
             Ok(c_sql) => {
                 let rc = ffi::sqlite3_declare_vtab(db, c_sql.as_ptr());
                 if rc == ffi::SQLITE_OK {
@@ -1015,7 +1015,7 @@ where
         .map(|&cs| CStr::from_ptr(cs).to_bytes()) // FIXME .to_str() -> Result<&str, Utf8Error>
         .collect::<Vec<_>>();
     match T::connect(&mut conn, aux.as_ref(), &vec[..]) {
-        Ok((sql, vtab)) => match ::std::ffi::CString::new(sql) {
+        Ok((sql, vtab)) => match std::ffi::CString::new(sql) {
             Ok(c_sql) => {
                 let rc = ffi::sqlite3_declare_vtab(db, c_sql.as_ptr());
                 if rc == ffi::SQLITE_OK {