Mac: More pluming for OOP font loading

ipc/ipc_message_utils.h

Index: ipc/ipc_message_utils.h
diff --git a/ipc/ipc_message_utils.h b/ipc/ipc_message_utils.h
index df2c6c7693ff7df67e3148b5cd8e0d211df54b88..747d2620cfca91aae76e9a03d528f083df85b835 100644
--- a/ipc/ipc_message_utils.h
+++ b/ipc/ipc_message_utils.h
@@ -226,6 +226,33 @@ struct ParamTraits<unsigned long long> {
   }
 };
 
+// Note that the IPC layer doesn't sanitize NaNs and +/- INF values.  Clients
+// should be sure to check the sanity of these values after receiving them over
+// IPC.
+template <>
+struct ParamTraits<float> {
+  typedef float param_type;
+  static void Write(Message* m, const param_type& p) {
+    m->WriteData(reinterpret_cast<const char*>(&p), sizeof(param_type));
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    const char *data;

[agl, 2010/06/15 14:10:15]

Seems over complex:

const char* data;
int data_size;
if (!m->ReadData(iter, &data, &data_size) ||
    data_size != sizeof(param_type)) {
  NOTREACHED();
  return false;
}

memcpy(r, data, sizeof(param_type));
return true;

[jeremy, 2010/06/15 14:26:55]

Agreed, I wanted to match the definition for double, I'll change both before
landing.

+    int data_size = 0;
+    bool result = m->ReadData(iter, &data, &data_size);
+    if (result && data_size == sizeof(param_type)) {
+      memcpy(r, data, sizeof(param_type));
+    } else {
+      result = false;
+      NOTREACHED();
+    }
+
+    return result;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    l->append(StringPrintf(L"e", p));
+  }
+};
+
 template <>
 struct ParamTraits<double> {
   typedef double param_type;