Add additional restriction to policy schema internal (part1)

components/policy/core/common/schema_internal.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_SCHEMA_INTERNAL_H_
 #define COMPONENTS_POLICY_CORE_COMMON_SCHEMA_INTERNAL_H_
 
 #include "base/values.h"
 #include "components/policy/policy_export.h"
 
@@ skipping 10 matching lines @@
   base::Value::Type type;
 
   // If |type| is TYPE_DICTIONARY then |extra| is an offset into
   // SchemaData::properties_nodes that indexes the PropertiesNode describing
   // the entries of this dictionary.
   //
   // If |type| is TYPE_LIST then |extra| is an offset into
   // SchemaData::schema_nodes that indexes the SchemaNode describing the items
   // of this list.
   //
+  // If |type| is TYPE_INTEGER or TYPE_STRING, and contains corresponding
+  // restriction (enumeration of possible values, or range for integer), then
+  // |extra| is an offset into SchemaData::restriction_nodes that indexes the
+  // RestrictionNode describing the restriction on the value.
+  //
   // Otherwise extra is -1 and is invalid.
   int extra;
 };
 
 // Represents an entry of a map policy.
 struct POLICY_EXPORT PropertyNode {
   // The entry key.
   const char* key;
 
   // An offset into SchemaData::schema_nodes that indexes the SchemaNode
@@ skipping 18 matching lines @@
   int end;
 
   // If this map policy supports keys with any value (besides the well-known
   // values described in the range [begin, end)) then |additional| is an offset
   // into SchemaData::schema_nodes that indexes the SchemaNode describing the
   // structure of the values for those keys. Otherwise |additional| is -1 and
   // is invalid.
   int additional;
 };
 
+// Represents the restriction on TYPE_INTEGER or TYPE_STRING instance of
+// base::Value.
+union POLICY_EXPORT RestrictionNode {
+  // Offsets into SchemaData::int_enums or SchemaData::string_enums, the
+  // entry of which describes the enumeration of all possible values of
+  // corresponding integer or string value. |offset_begin| being strictly less
+  // than |offset_end| is assumed.
+  struct EnumerationRestriction {
+    int offset_begin;
+    int offset_end;
+  } enumeration_restriction;
+
+  // For integer type only, represents that all values between |min_value|
+  // and |max_value| can be choosen. Note that integer type in base::Value
+  // is bounded, so this can also be used if only one of |min_value| and
+  // |max_value| is stated. |max_value| being greater or equal to |min_value|
+  // is assumed.
+  struct RangedRestriction {
+    int max_value;
+    int min_value;
+  } ranged_restriction;
+};
+
+
 // Contains arrays of related nodes. All of the offsets in these nodes reference
 // other nodes in these arrays.
 struct POLICY_EXPORT SchemaData {
   const SchemaNode* schema_nodes;
   const PropertyNode* property_nodes;
   const PropertiesNode* properties_nodes;
+  const RestrictionNode* restriction_nodes;
+
+  const int* int_enums;
+  const char** string_enums;
 };
 
 }  // namespace internal
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_SCHEMA_INTERNAL_H_