diff options
Diffstat (limited to 'src/blob/mod.rs')
| -rw-r--r-- | src/blob/mod.rs | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/src/blob/mod.rs b/src/blob/mod.rs index 202f65d..81c6098 100644 --- a/src/blob/mod.rs +++ b/src/blob/mod.rs @@ -1,4 +1,4 @@ -//! `feature = "blob"` Incremental BLOB I/O. +//! Incremental BLOB I/O. //! //! Note that SQLite does not provide API-level access to change the size of a //! BLOB; that must be performed through SQL statements. @@ -196,7 +196,7 @@ use crate::{Connection, DatabaseName, Result}; mod pos_io; -/// `feature = "blob"` Handle to an open BLOB. See +/// Handle to an open BLOB. See /// [`rusqlite::blob`](crate::blob) documentation for in-depth discussion. pub struct Blob<'conn> { conn: &'conn Connection, @@ -206,7 +206,7 @@ pub struct Blob<'conn> { } impl Connection { - /// `feature = "blob"` Open a handle to the BLOB located in `row_id`, + /// Open a handle to the BLOB located in `row_id`, /// `column`, `table` in database `db`. /// /// # Failure @@ -223,9 +223,9 @@ impl Connection { row_id: i64, read_only: bool, ) -> Result<Blob<'a>> { - let mut c = self.db.borrow_mut(); + let c = self.db.borrow_mut(); let mut blob = ptr::null_mut(); - let db = db.to_cstring()?; + let db = db.as_cstring()?; let table = super::str_to_cstring(table)?; let column = super::str_to_cstring(column)?; let rc = unsafe { @@ -265,12 +265,14 @@ impl Blob<'_> { /// Return the size in bytes of the BLOB. #[inline] + #[must_use] pub fn size(&self) -> i32 { unsafe { ffi::sqlite3_blob_bytes(self.blob) } } /// Return the current size in bytes of the BLOB. #[inline] + #[must_use] pub fn len(&self) -> usize { use std::convert::TryInto; self.size().try_into().unwrap() @@ -278,6 +280,7 @@ impl Blob<'_> { /// Return true if the BLOB is empty. #[inline] + #[must_use] pub fn is_empty(&self) -> bool { self.size() == 0 } @@ -318,8 +321,7 @@ impl io::Read for Blob<'_> { if n <= 0 { return Ok(0); } - let rc = - unsafe { ffi::sqlite3_blob_read(self.blob, buf.as_mut_ptr() as *mut _, n, self.pos) }; + let rc = unsafe { ffi::sqlite3_blob_read(self.blob, buf.as_mut_ptr().cast(), n, self.pos) }; self.conn .decode_result(rc) .map(|_| { @@ -400,7 +402,7 @@ impl Drop for Blob<'_> { } } -/// `feature = "blob"` BLOB of length N that is filled with zeroes. +/// BLOB of length N that is filled with zeroes. /// /// Zeroblobs are intended to serve as placeholders for BLOBs whose content is /// later written using incremental BLOB I/O routines. |