story-kit: merge 260_refactor_upgrade_libsqlite3_sys

vendor/rusqlite/src/util/mod.rs

@@ -0,0 +1,55 @@
+// Internal utilities
+pub(crate) mod param_cache;
+mod small_cstr;
+pub(crate) use param_cache::ParamIndexCache;
+pub(crate) use small_cstr::SmallCString;
+
+// Doesn't use any modern features or vtab stuff, but is only used by them.
+mod sqlite_string;
+pub(crate) use sqlite_string::{alloc, SqliteMallocString};
+
+#[cfg(any(
+    feature = "collation",
+    feature = "functions",
+    feature = "vtab",
+    feature = "pointer"
+))]
+pub(crate) unsafe extern "C" fn free_boxed_value<T>(p: *mut std::ffi::c_void) {
+    drop(Box::from_raw(p.cast::<T>()));
+}
+
+use crate::Result;
+use std::ffi::CStr;
+
+pub enum Named<'a> {
+    Small(SmallCString),
+    C(&'a CStr),
+}
+impl std::ops::Deref for Named<'_> {
+    type Target = CStr;
+    #[inline]
+    fn deref(&self) -> &CStr {
+        match self {
+            Named::Small(s) => s.as_cstr(),
+            Named::C(s) => s,
+        }
+    }
+}
+
+/// Database, table, column, collation, function, module, vfs name
+pub trait Name: std::fmt::Debug {
+    /// As C string
+    fn as_cstr(&self) -> Result<Named<'_>>;
+}
+impl Name for &str {
+    fn as_cstr(&self) -> Result<Named<'_>> {
+        let ss = SmallCString::new(self)?;
+        Ok(Named::Small(ss))
+    }
+}
+impl Name for &CStr {
+    #[inline]
+    fn as_cstr(&self) -> Result<Named<'_>> {
+        Ok(Named::C(self))
+    }
+}