public static void Disconnect(Context ctx, Table table)
{
Debug.Assert(E.IsVirtual(table));
Debug.Assert(Btree.HoldsAllMutexes(ctx));
Debug.Assert(MutexEx.Held(ctx.Mutex));
for (VTable pvtable = table.VTables; pvtable != null; pvtable = pvtable.Next)
{
if (pvtable.Ctx == ctx)
{
VTable vtable = pvtable;
vtable = vtable.Next;
vtable.Unlock();
break;
}
}
}
public static void UnlockList(Context ctx)
{
Debug.Assert(Btree.HoldsAllMutexes(ctx));
Debug.Assert(MutexEx.Held(ctx.Mutex));
VTable vtable = ctx.Disconnect;
ctx.Disconnect = null;
if (vtable != null)
{
Vdbe.ExpirePreparedStatements(ctx);
do
{
VTable next = vtable.Next;
vtable.Unlock();
vtable = next;
} while (vtable != null);
}
}
public static RC CallDestroy(Context ctx, int db, string tableName)
{
RC rc = RC.OK;
Table table = Parse.FindTable(ctx, tableName, ctx.DBs[db].Name);
if (C._ALWAYS(table != null && table.VTables != null))
{
VTable vtable = VTableDisconnectAll(ctx, table);
Debug.Assert(rc == RC.OK);
rc = vtable.Module.IModule.Destroy(vtable.IVTable);
// Remove the sqlite3_vtab* from the aVTrans[] array, if applicable
if (rc == RC.OK)
{
Debug.Assert(table.VTables == vtable && vtable.Next == null);
vtable.IVTable = null;
table.VTables = null;
vtable.Unlock();
}
}
return(rc);
}
static void CallFinaliser(Context ctx, int offset)
{
if (ctx.VTrans.data != null)
{
for (int i = 0; i < ctx.VTrans.length; i++)
{
VTable vtable = ctx.VTrans[i];
IVTable ivtable = vtable.IVTable;
if (ivtable != null)
{
Func <IVTable, int> x = null;
if (offset == 0)
{
x = ivtable.IModule.Rollback;
}
else if (offset == 1)
{
x = ivtable.IModule.Commit;
}
else
{
throw new InvalidOperationException();
}
if (x != null)
{
x(ivtable);
}
}
vtable.Savepoints = 0;
vtable.Unlock();
}
C._tagfree(ctx, ref ctx.VTrans.data);
ctx.VTrans.length = 0;
ctx.VTrans.data = null;
}
}
static RC VTableCallConstructor(Context ctx, Table table, TableModule module, Construct_t construct, ref string errorOut)
{
string moduleName = table.Name;
if (moduleName == null)
{
return(RC.NOMEM);
}
VTable vtable = new VTable();
if (vtable == null)
{
C._tagfree(ctx, ref moduleName);
return(RC.NOMEM);
}
vtable.Ctx = ctx;
vtable.Module = module;
int db = sqlite3SchemaToIndex(ctx, table.Schema);
table.ModuleArgs[1] = ctx.DBs[db].Name;
// Invoke the virtual table constructor
Debug.Assert(ctx.VTableCtx != null);
Debug.Assert(construct != null);
VTableContext sVtableCtx = new VTableContext();
sVtableCtx.Table = table;
sVtableCtx.VTable = vtable;
VTableContext priorCtx = ctx.VTableCtx;
ctx.VTableCtx = sVtableCtx;
string[] args = table.ModuleArgs.data;
int argsLength = table.ModuleArgs.length;
string error = null;
RC rc = construct(ctx, module.Aux, argsLength, args, out vtable.IVTable, out error);
ctx.VTableCtx = null;
if (rc == RC.NOMEM)
{
ctx.MallocFailed = true;
}
if (rc != RC.OK)
{
if (error == null)
{
errorOut = C._mtagprintf(ctx, "vtable constructor failed: %s", moduleName);
}
else
{
errorOut = error;
error = null; //: _free(error);
}
C._tagfree(ctx, ref vtable);
}
else if (C._ALWAYS(vtable.IVTable != null))
{
// Justification of ALWAYS(): A correct vtab constructor must allocate the sqlite3_vtab object if successful.
vtable.IVTable.IModule = module.IModule;
vtable.Refs = 1;
if (sVtableCtx.Table != null)
{
errorOut = C._mtagprintf(ctx, "vtable constructor did not declare schema: %s", table.Name);
vtable.Unlock();
rc = RC.ERROR;
}
else
{
// If everything went according to plan, link the new VTable structure into the linked list headed by pTab->pVTable. Then loop through the
// columns of the table to see if any of them contain the token "hidden". If so, set the Column COLFLAG_HIDDEN flag and remove the token from
// the type string.
vtable.Next = table.VTables;
table.VTables = vtable;
for (int col = 0; col < table.Cols.length; col++)
{
string type = table.Cols[col].Type;
if (type == null)
{
continue;
}
int typeLength = type.Length;
int i = 0;
if (string.Compare("hidden", 0, type, 0, 6, StringComparison.OrdinalIgnoreCase) == 0 || (type.Length > 6 && type[6] != ' '))
{
for (i = 0; i < typeLength; i++)
{
if (string.Compare(" hidden", 0, type, i, 7, StringComparison.OrdinalIgnoreCase) == 0 && (i + 7 == type.Length || (type[i + 7] == '\0' || type[i + 7] == ' ')))
{
i++;
break;
}
}
}
if (i < typeLength)
{
StringBuilder type2 = new StringBuilder(type);
int del = 6 + (type2.Length > i + 6 ? 1 : 0);
int j;
for (j = i; (j + del) < typeLength; j++)
{
type2[j] = type2[j + del];
}
if (type2[i] == '\0' && i > 0)
{
Debug.Assert(type[i - 1] == ' ');
type2.Length = i; //: type[i - 1] = '\0';
}
table.Cols[col].ColFlags |= COLFLAG.HIDDEN;
table.Cols[col].Type = type.ToString().Substring(0, j);
}
}
}
}
C._tagfree(ctx, ref moduleName);
return(rc);
}