More multi-version support (part 2)

Add member to Node to return a set of unique releases for that node.
Updates DefineStruct to iterate across all unique releases for the
struct, generating first the most recent release as we do today
and other releases without comments, and the version number 
appended to the structure name.

NOTE: This is work in progress. This CL adds support for
Interfaces that change which should be enough for M15.  While this
same CL creates multiple structures when the structures change, 
references to structures will not have mangled names which would 
cause errors.

BUG= http://code.google.com/p/chromium/issues/detail?id=89969
TEST= python generator.py --cgen --test --diff --range=M13,M14
Review URL: http://codereview.chromium.org/7751001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98298 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 23 insertions, 7 deletions

diff --git a/ppapi/generators/idl_c_proto.py b/ppapi/generators/idl_c_proto.py
index 05937e4..1ea8e03 100644
--- a/ppapi/generators/idl_c_proto.py
+++ b/ppapi/generators/idl_c_proto.py
@@ -398,27 +398,43 @@ class CGen(object):
     self.LogExit('Exit DefineMember')
     return out
 
-  # Define a Struct.
-  def DefineStruct(self, node, releases, prefix='', comment=False):
+  def DefineStructInternals(self, node, release, suffix='', comment=True):
     out = ''
-
-    self.LogEnter('DefineStruct %s' % node)
     if node.GetProperty('union'):
-      out += 'union %s%s {\n' % (prefix, node.GetName())
+      out += 'union %s%s {\n' % (node.GetName(), suffix)
     else:
-      out += 'struct %s%s {\n' % (prefix, node.GetName())
+      out += 'struct %s%s {\n' % (node.GetName(), suffix)
 
     # Generate Member Functions
     members = []
     for child in node.GetListOf('Member'):
-      member = self.Define(child, releases, tabs=1, comment=comment)
+      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):
+    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)
+
+    # 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,
+                                               comment=False)
+
     self.LogExit('Exit DefineStruct')
     return out
 
+
   #
   # Copyright and Comment
   #