Pnacl ppapi shim generator (from IDL), based on Noel's first cut.

ppapi/generators/idl_c_proto.py

 #!/usr/bin/python
 #
 # Copyright (c) 2011 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.
 
 """ Generator for C style prototypes and definitions """
 
 import glob
 import os
@@ skipping 320 matching lines @@
     return 'return'
 
   #
   # GetComponents
   #
   # Returns the signature components of an object as a tuple of
   # (rtype, name, arrays, callspec) where:
   #   rtype - The store or return type of the object.
   #   name - The name of the object.
   #   arrays - A list of array dimensions as [] or [<fixed_num>].
-  #   args -  None of not a function, otherwise  a list of parameters.
+  #   args -  None if not a function, otherwise a list of parameters.
   #
   def GetComponents(self, node, release, mode):
     self.LogEnter('GetComponents mode %s for %s %s' % (mode, node, release))
 
     # Generate passing type by modifying root type
     rtype = self.GetTypeByMode(node, release, mode)
     if node.IsA('Enum', 'Interface', 'Struct'):
       rname = node.GetName()
     else:
       rname = node.GetType(release).GetName()
@@ skipping 12 matching lines @@
         ptype, pname, parray, pspec = self.GetComponents(param, release, mode)
         callspec.append((ptype, pname, parray, pspec))
     else:
       callspec = None
 
     self.LogExit('GetComponents: %s, %s, %s, %s' %
                  (rtype, name, arrayspec, callspec))
     return (rtype, name, arrayspec, callspec)
 
 
-  def Compose(self, rtype, name, arrayspec, callspec, prefix, func_as_ptr):
+  def Compose(self, rtype, name, arrayspec, callspec, prefix, func_as_ptr,
+              func_attributes, is_cast):

[jvoung - send to chromium..., 2011/11/16 01:45:22]

changed func_attributes to ptr_prefix
changed is_cast to include_name (and changed callsites so that it is possible to
get an empty "name" for casts)

     self.LogEnter('Compose: %s %s' % (rtype, name))
     arrayspec = ''.join(arrayspec)
     name = '%s%s%s' % (prefix, name, arrayspec)
     if callspec is None:
       out = '%s %s' % (rtype, name)
     else:
       params = []
       for ptype, pname, parray, pspec in callspec:
-        params.append(self.Compose(ptype, pname, parray, pspec, '', True))
-      if func_as_ptr: name = '(*%s)' % name
+        params.append(self.Compose(ptype, pname, parray, pspec, '', True,
+                                   func_attributes='', is_cast=''))
+      if func_as_ptr:
+        if is_cast:
+          name = '(%s*)' % (func_attributes)
+        else:
+          name = '(%s*%s)' % (func_attributes, name)
       out = '%s %s(%s)' % (rtype, name, ', '.join(params))
     self.LogExit('Exit Compose: %s' % out)
     return out
 
   #
   # GetSignature
   #
   # Returns the 'C' style signature of the object
   #  prefix - A prefix for the object's name
   #  func_as_ptr - Formats a function as a function pointer
   #
-  def GetSignature(self, node, release, mode, prefix='', func_as_ptr=True):
-    self.LogEnter('GetSignature %s %s as func=%s' % (node, mode, func_as_ptr))
+  def GetSignature(self, node, release, mode, prefix='', func_as_ptr=True,
+                   func_attributes='', is_cast=False):
+    self.LogEnter('GetSignature %s %s as func=%s attribs=%s' %
+                  (node, mode, func_as_ptr, func_attributes))
     rtype, name, arrayspec, callspec = self.GetComponents(node, release, mode)
-    out = self.Compose(rtype, name, arrayspec, callspec, prefix, func_as_ptr)
+    out = self.Compose(rtype, name, arrayspec, callspec, prefix,
+                       func_as_ptr, func_attributes, is_cast)
     self.LogExit('Exit GetSignature: %s' % out)
     return out
 
   # Define a Typedef.
-  def DefineTypedef(self, node, releases, prefix='', comment=False):
+  def DefineTypedef(self, node, releases, prefix='', comment=False,
+                    func_attributes=''):
     __pychecker__ = 'unusednames=comment'
     release = releases[0]
     out = 'typedef %s;\n' % self.GetSignature(node, release, 'return',
                                               prefix, True)
     self.Log('DefineTypedef: %s' % out)
     return out
 
   # Define an Enum.
   def DefineEnum(self, node, releases, prefix='', comment=False):
     __pychecker__ = 'unusednames=comment,releases'
@@ skipping 22 matching lines @@
     return out
 
   def DefineMember(self, node, releases, prefix='', comment=False):
     __pychecker__ = 'unusednames=prefix,comment'
     release = releases[0]
     self.LogEnter('DefineMember %s' % node)
     out = '%s;' % self.GetSignature(node, release, 'store', '', True)
     self.LogExit('Exit DefineMember')
     return out
 
-  def DefineStructInternals(self, node, release, suffix='', comment=True):
+  def GetStructName(self, node, release, is_latest_release=False):

[jvoung - send to chromium..., 2011/11/16 01:45:22]

changed parameter to "include_version" to be more descriptive.

+    suffix = ''
+    if not is_latest_release:
+      ver_num = node.GetVersion(release)
+      suffix = ('_%s' % ver_num).replace('.', '_')
+    return node.GetName() + suffix
+
+  def DefineStructInternals(self, node, release,
+                            is_latest_release=False, comment=True):
     out = ''
     if node.GetProperty('union'):
-      out += 'union %s%s {\n' % (node.GetName(), suffix)
+      out += 'union %s {\n' % (
+          self.GetStructName(node, release, is_latest_release))
     else:
-      out += 'struct %s%s {\n' % (node.GetName(), suffix)
+      out += 'struct %s {\n' % (
+          self.GetStructName(node, release, is_latest_release))
 
     # Generate Member Functions
     members = []
     for child in node.GetListOf('Member'):
       member = self.Define(child, [release], tabs=1, comment=comment)
       if not member:
         continue
       members.append(member)
     out += '%s\n};\n' % '\n'.join(members)
     return out
 
 
   def DefineStruct(self, node, releases, prefix='', comment=False):
     __pychecker__ = 'unusednames=comment,prefix'
     self.LogEnter('DefineStruct %s' % node)
     out = ''
     build_list = node.GetUniqueReleases(releases)
 
     # Build the most recent one with comments
-    out = self.DefineStructInternals(node, build_list[-1], comment=True)
+    out = self.DefineStructInternals(node, build_list[-1],
+                                     is_latest_release=True, comment=True)
 
     # Build the rest without comments and with the version number appended
     for rel in build_list[0:-1]:
-      ver_num = node.GetVersion(rel)
-      ver = ("_%s" % ver_num).replace('.', '_')
-      out += '\n' + self.DefineStructInternals(node, rel, suffix=ver,
+      out += '\n' + self.DefineStructInternals(node, rel,
+                                               is_latest_release=False,
                                                comment=False)
 
     self.LogExit('Exit DefineStruct')
     return out
 
 
   #
   # Copyright and Comment
   #
   # Generate a comment or copyright block
@@ skipping 118 matching lines @@
     if f.GetProperty('ERRORS') > 0:
       print 'Skipping %s' % f.GetName()
       continue
     print DefineDepends(node)
     for node in f.GetChildren()[2:]:
       print Define(node, comment=True, prefix='tst_')
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv[1:]))