Code generation for extensions api

tools/json_schema_compiler/cpp_util.py

Index: tools/json_schema_compiler/cpp_util.py
diff --git a/tools/json_schema_compiler/cpp_util.py b/tools/json_schema_compiler/cpp_util.py
new file mode 100644
index 0000000000000000000000000000000000000000..31e991fd1c48190fdfb258a85237d1c39ec6122b
--- /dev/null
+++ b/tools/json_schema_compiler/cpp_util.py
@@ -0,0 +1,50 @@
+# Copyright (c) 2012 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.
+"""Utilies and constants specific to Chromium C++ code.
+"""
+
+from datetime import datetime
+from model import PropertyType
+
+CHROMIUM_LICENSE = (
+"""// Copyright (c) %d 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.""" % datetime.now().year
+)
+GENERATED_FILE_MESSAGE = """// GENERATED FROM THE API DEFINITION IN
+//   %s
+// DO NOT EDIT.
+"""
+
+def cpp_name(s):

[Yoyo Zhou, 2012/01/19 02:19:40]

Separate top-level function and class definitions with two blank lines.

[calamity, 2012/01/20 01:10:25]

Done.

+  """Translates a namespace name or function name into something more
+  suited to C++.
+
+  eg experimental.downloads -> Experimental_Downloads
+  updateAll -> UpdateAll.
+  """
+  return '_'.join([x[0].upper() + x[1:] for x in s.split('.')])

[Yoyo Zhou, 2012/01/19 02:19:40]

x.capitalize()

[calamity, 2012/01/20 01:10:25]

Capitalize inconveniently lowercases everything after the 1st letter.

[Yoyo Zhou, 2012/01/23 23:16:42]

Oh, sadness.

+
+def create_fundamental_value(prop, var):
+  """Returns the C++ code for creating a value of the given property type
+  using the given variable.
+  """
+  return {
+      PropertyType.STRING: 'Value::CreateStringValue(%s)',
+      PropertyType.BOOLEAN: 'Value::CreateBooleanValue(%s)',
+      PropertyType.INTEGER: 'Value::CreateIntegerValue(%s)',
+      PropertyType.DOUBLE: 'Value::CreateDoubleValue(%s)',
+  }[prop.type] % var
+
+
+def get_fundamental_value(prop, var):
+  """Returns the C++ code for retrieving a fundamental type from a Value
+  into a variable.
+  """
+  return {
+      PropertyType.STRING: 'GetAsString(%s)',
+      PropertyType.BOOLEAN: 'GetAsBoolean(%s)',
+      PropertyType.INTEGER: 'GetAsInteger(%s)',
+      PropertyType.DOUBLE: 'GetAsDouble(%s)',
+  }[prop.type] % var