Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/rgw/driver/dbstore/sqlite/error.h b/src/rgw/driver/dbstore/sqlite/error.h
new file mode 100644
index 000000000..15396d8ca
--- /dev/null
+++ b/src/rgw/driver/dbstore/sqlite/error.h
@@ -0,0 +1,81 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2022 Red Hat, Inc.
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#pragma once
+
+#include <system_error>
+#include <sqlite3.h>
+
+namespace rgw::dbstore::sqlite {
+
+// error category for sqlite extended result codes:
+//   https://www.sqlite.org/rescode.html
+const std::error_category& error_category();
+
+
+// sqlite exception type that carries the extended error code and message
+class error : public std::runtime_error {
+  std::error_code ec;
+ public:
+  error(const char* errmsg, std::error_code ec)
+      : runtime_error(errmsg), ec(ec) {}
+  error(sqlite3* db, std::error_code ec) : error(::sqlite3_errmsg(db), ec) {}
+  error(sqlite3* db, int result) : error(db, {result, error_category()}) {}
+  error(sqlite3* db) : error(db, ::sqlite3_extended_errcode(db)) {}
+  std::error_code code() const { return ec; }
+};
+
+
+// sqlite error conditions for primary and extended result codes
+//
+// 'primary' error_conditions will match 'primary' error_codes as well as any
+// 'extended' error_codes whose lowest 8 bits match that primary code. for
+// example, the error_condition for SQLITE_CONSTRAINT will match the error_codes
+// SQLITE_CONSTRAINT and SQLITE_CONSTRAINT_*
+enum class errc {
+  // primary result codes
+  ok = SQLITE_OK,
+  busy = SQLITE_BUSY,
+  constraint = SQLITE_CONSTRAINT,
+  row = SQLITE_ROW,
+  done = SQLITE_DONE,
+
+  // extended result codes
+  primary_key_constraint = SQLITE_CONSTRAINT_PRIMARYKEY,
+  foreign_key_constraint = SQLITE_CONSTRAINT_FOREIGNKEY,
+  unique_constraint = SQLITE_CONSTRAINT_UNIQUE,
+
+  // ..add conditions as needed
+};
+
+inline std::error_code make_error_code(errc e)
+{
+  return {static_cast<int>(e), error_category()};
+}
+
+inline std::error_condition make_error_condition(errc e)
+{
+  return {static_cast<int>(e), error_category()};
+}
+
+} // namespace rgw::dbstore::sqlite
+
+namespace std {
+
+// enable implicit conversions from sqlite::errc to std::error_condition
+template<> struct is_error_condition_enum<
+    rgw::dbstore::sqlite::errc> : public true_type {};
+
+} // namespace std