Mojo + NaCl prototype.

mojo/nacl/generator/interface_dsl.py

Index: mojo/nacl/generator/interface_dsl.py
diff --git a/mojo/nacl/generator/interface_dsl.py b/mojo/nacl/generator/interface_dsl.py
new file mode 100644
index 0000000000000000000000000000000000000000..432bb775a59eaf605ba0db1197ffb65c600f70ce
--- /dev/null
+++ b/mojo/nacl/generator/interface_dsl.py
@@ -0,0 +1,121 @@
+# Copyright 2014 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.
+
+class Interface(object):
+  def __init__(self):
+    self.functions = []
+
+  def Func(self, name, return_type):
+    f = Function(self, len(self.functions), name, return_type)
+    self.functions.append(f)
+    return f
+
+  def Finalize(self):
+    for f in self.functions:
+      f.Finalize()
+
+class Function(object):
+  def __init__(self, parent, uid, name, return_type):
+    self.parent = parent
+    self.uid = uid
+    self.name = name
+    self.returnType = return_type

[Mark Seaborn, 2014/09/11 19:24:02]

These don't follow the style guide still.  "return_type" etc.?

[Nick Bray, 2014/09/11 20:24:08]

Done.

+    self.params = []
+    self.paramByName = {}

[Mark Seaborn, 2014/09/11 19:24:02]

"param_by_name"

[Nick Bray, 2014/09/11 20:24:09]

Done.

+    self.resultParam = None
+
+  def Param(self, name, param_type=None):
+    p = Param(self, len(self.params), name, param_type)
+    self.params.append(p)
+    self.paramByName[name] = p
+    return p
+
+  def ParamList(self):
+    return [param.paramType + ' ' + param.name for param in self.params]
+
+  def ParamDecl(self):
+    if self.params:
+      return ', '.join(self.ParamList())
+    else:
+      return 'void'
+
+  def Finalize(self):
+    for p in self.params:
+      p.Finalize()

[Mark Seaborn, 2014/09/11 19:24:02]

This is a no-op, right?

[Nick Bray, 2014/09/11 20:24:09]

Done.

+    self.resultParam = Param(self, len(self.params), 'result')
+    self.resultParam.Out(self.returnType)
+
+class Param(object):
+  def __init__(self, parent, uid, name, param_type=None):
+    self.parent = parent
+    self.uid = uid
+    self.name = name
+    self.baseType = param_type

[Mark Seaborn, 2014/09/11 19:24:02]

Ditto: "base_type" etc.?

[Nick Bray, 2014/09/11 20:24:09]

Done.

+    self.paramType = param_type
+    self.size = None
+    self.isInput = False
+    self.isOutput = False
+    self.isArray = False
+    self.isStruct = False
+    self.isOptional = False
+
+  def GetSizeParam(self):
+    assert self.size
+    return self.parent.paramByName[self.size]
+
+  def In(self, ty):
+    self.baseType = ty
+    self.paramType = ty
+    self.isInput = True
+    return self
+
+  def InArray(self, ty, size):
+    self.baseType = ty
+    self.paramType = 'const ' + ty + '*'
+    self.size = size
+    self.isInput = True
+    self.isArray = True
+    return self
+
+  def InStruct(self, ty):
+    self.baseType = ty
+    self.paramType = 'const struct ' + ty + '*'
+    self.isInput = True
+    self.isStruct = True
+    return self
+
+  def InOut(self, ty):
+    self.baseType = ty
+    self.paramType = ty + '*'
+    self.isInput = True
+    self.isOutput = True
+    return self
+
+  def Out(self, ty):
+    self.baseType = ty
+    self.paramType = ty + '*'
+    self.isOutput = True
+    return self
+
+  def OutArray(self, ty, size):
+    self.baseType = ty
+    self.paramType = ty + '*'
+    self.size = size
+    self.isArray = True
+    self.isOutput = True
+    return self
+
+  def Optional(self):
+    assert not self.IsPassedByValue()
+    self.isOptional = True
+    return self
+
+  def IsScalar(self):
+    return not self.isArray and not self.isStruct
+
+  def IsPassedByValue(self):
+    return not self.isOutput and self.IsScalar()
+
+  def Finalize(self):
+    pass