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Fix functions for empty blobs

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Expands fix from #175
This commit is contained in:
Aidan Hobson Sayers 2017-04-16 16:49:28 +01:00
parent cd824aeaee
commit 7bd969b8fd
1 changed files with 10 additions and 6 deletions
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14
src/functions.rs
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@ -158,15 +158,19 @@ impl<'a> ValueRef<'a> {
ValueRef::Text(s) ValueRef::Text(s)
} }
ffi::SQLITE_BLOB => { ffi::SQLITE_BLOB => {
let blob = ffi::sqlite3_value_blob(value); let (blob, len) = (ffi::sqlite3_value_blob(value), ffi::sqlite3_value_bytes(value));
assert!(!blob.is_null(),
"unexpected SQLITE_BLOB value type with NULL data");
let len = ffi::sqlite3_value_bytes(value);
assert!(len >= 0, assert!(len >= 0,
"unexpected negative return from sqlite3_value_bytes"); "unexpected negative return from sqlite3_value_bytes");
if len > 0 {
assert!(!blob.is_null(),
"unexpected SQLITE_BLOB value type with NULL data");
ValueRef::Blob(from_raw_parts(blob as *const u8, len as usize)) ValueRef::Blob(from_raw_parts(blob as *const u8, len as usize))
} else {
// The return value from sqlite3_value_blob() for a zero-length BLOB
// is a NULL pointer.
ValueRef::Blob(&[])
}
} }
_ => unreachable!("sqlite3_value_type returned invalid value"), _ => unreachable!("sqlite3_value_type returned invalid value"),
} }