Move proto generation template into separate file

templates/proto.j2

@@ -0,0 +1,54 @@
+#pragma once
+#ifndef _uefi_protos_{{ name }}_h_
+#define _uefi_protos_{{ name }}_h_
+
+// This file was auto generated by the j6-uefi-headers project. Please see
+// https://github.com/justinian/j6-uefi-headers for more information.
+
+#include <uefi/guid.h>
+#include <uefi/types.h>
+{%- for header in headers %}
+#include <{{ header }}>
+{%- endfor %}
+
+namespace uefi {
+namespace protos {
+struct {{ name }};
+
+struct {{ name }}
+{
+    {% if guid %}static constexpr uefi::guid guid{ {{ guid }} };{% endif %}
+{% for method in methods %}
+    inline uefi::status {{ method.name }}(
+      {%- for arg in method.args -%}
+        {% if not loop.first %}, {% endif -%}
+        {{ arg.type }} {{ arg.name }}
+      {%- endfor %}) {
+        return _{{ method.name }}(
+        {%- if not method.get("skip_this", false) -%}this{%- endif -%}
+        {%- if not method.get("skip_this", false) and method.args %}, {% endif -%}
+        {{ method.args|join(', ', attribute='name') }});
+    }
+{% endfor %}
+{%- for datum in pre_data %}
+    {{ datum.type }} {{ datum.name }};
+{%- endfor %}
+
+protected:
+{%- for method in methods %}
+    using _{{ method.name }}_def = uefi::status (*)(
+    {%- if not method.get("skip_this", false) -%}uefi::protos::{{ name }} *{%- endif -%}
+    {%- if not method.get("skip_this", false) and method.args %}, {% endif -%}
+    {{ method.args|join(', ', attribute='type') }});
+    _{{ method.name }}_def _{{ method.name }};
+{% endfor %}
+public:
+{%- for datum in post_data %}
+    {{ datum.type }} {{ datum.name }};
+{%- endfor %}
+};
+
+} // namespace protos
+} // namespace uefi
+
+#endif // _uefi_protos_{{ name }}_h_