internal static agg_function_hook_info from_ptr(IntPtr p)
{
GCHandle h = (GCHandle)p;
agg_function_hook_info hi = h.Target as agg_function_hook_info;
// TODO assert(hi._h == h)
return(hi);
}
static void agg_function_hook_bridge_final(IntPtr context)
{
IntPtr agg = new IntPtr(SQLite3RuntimeProvider.sqlite3_aggregate_context(context.ToInt64(), 8));
// TODO error check agg nomem
IntPtr p = new IntPtr(SQLite3RuntimeProvider.sqlite3_user_data(context.ToInt64()));
agg_function_hook_info hi = agg_function_hook_info.from_ptr(p);
hi.call_final(context, agg);
}
int ISQLite3Provider.sqlite3_create_function(IntPtr db, string name, int nargs, object v, delegate_function_aggregate_step func_step, delegate_function_aggregate_final func_final)
{
string key = string.Format("{0}.{1}", nargs, name);
if (_agg_functions.ContainsKey(key))
{
agg_function_hook_info hi = _agg_functions[key];
// TODO maybe turn off the hook here, for now
hi.free();
_agg_functions.Remove(key);
}
GCHandle pinned = GCHandle.Alloc(util.to_utf8(name), GCHandleType.Pinned);
IntPtr ptr = pinned.AddrOfPinnedObject();
int rc;
// 1 is SQLITE_UTF8
if (func_step != null)
{
// TODO both func_step and func_final must be non-null
agg_function_hook_info hi = new agg_function_hook_info(func_step, func_final, v);
rc = SQLite3RuntimeProvider.sqlite3_create_function_v2(db.ToInt64(), ptr.ToInt64(), nargs, 1, hi.ptr.ToInt64(), 0, Marshal.GetFunctionPointerForDelegate(new callback_agg_function_step(agg_function_hook_bridge_step)).ToInt64(), Marshal.GetFunctionPointerForDelegate(new callback_agg_function_final(agg_function_hook_bridge_final)).ToInt64(), 0);
if (rc == 0)
{
_agg_functions[key] = hi;
}
}
else
{
rc = SQLite3RuntimeProvider.sqlite3_create_function_v2(db.ToInt64(), ptr.ToInt64(), nargs, 1, 0, 0, 0, 0, 0);
}
pinned.Free();
return(rc);
}
int ISQLite3Provider.sqlite3_create_function (IntPtr db, string name, int nargs, object v, delegate_function_aggregate_step func_step, delegate_function_aggregate_final func_final)
{
// the keys for this dictionary are nargs.name, not just the name
string key = string.Format ("{0}.{1}", nargs, name);
var info = hooks.getOrCreateFor (db);
if (info.agg.ContainsKey (key)) {
agg_function_hook_info hi = info.agg [key];
// TODO maybe turn off the hook here, for now
hi.free ();
info.agg.Remove (key);
}
// 1 is SQLITE_UTF8
if (func_step != null) {
// TODO both func_step and func_final must be non-null
agg_function_hook_info hi = new agg_function_hook_info (func_step, func_final, v);
int rc = NativeMethods.sqlite3_create_function_v2 (db, util.to_utf8 (name), nargs, 1, hi.ptr, null, agg_function_hook_bridge_step, agg_function_hook_bridge_final, null);
if (rc == 0) {
info.agg [key] = hi;
}
return rc;
} else {
return NativeMethods.sqlite3_create_function_v2 (db, util.to_utf8 (name), nargs, 1, IntPtr.Zero, null, null, null, null);
}
}
int ISQLite3Provider.sqlite3_create_function(IntPtr db, string name, int nargs, object v, delegate_function_aggregate_step func_step, delegate_function_aggregate_final func_final)
{
// the keys for this dictionary are nargs.name, not just the name
string key = string.Format("{0}.{1}", nargs, name);
var info = hooks.getOrCreateFor(db);
if (info.agg.ContainsKey(key))
{
agg_function_hook_info hi = info.agg[key];
// TODO maybe turn off the hook here, for now
hi.free();
info.agg.Remove(key);
}
GCHandle pinned = GCHandle.Alloc(util.to_utf8(name), GCHandleType.Pinned);
IntPtr ptr = pinned.AddrOfPinnedObject();
int rc;
// 1 is SQLITE_UTF8
if (func_step != null)
{
// TODO both func_step and func_final must be non-null
agg_function_hook_info hi = new agg_function_hook_info(func_step, func_final, v);
rc = SQLite3RuntimeProvider.sqlite3_create_function_v2(db.ToInt64(), ptr.ToInt64(), nargs, 1, hi.ptr.ToInt64(), 0, Marshal.GetFunctionPointerForDelegate(agg_function_hook_bridge_step).ToInt64(), Marshal.GetFunctionPointerForDelegate(agg_function_hook_bridge_final).ToInt64(), 0);
if (rc == 0)
{
info.agg[key] = hi;
}
}
else
{
rc = SQLite3RuntimeProvider.sqlite3_create_function_v2(db.ToInt64(), ptr.ToInt64(), nargs, 1, 0, 0, 0, 0, 0);
}
pinned.Free();
return rc;
}
