Start refactoring to reduce executable type knowledge.

courgette/image_info.cc

 // Copyright (c) 2009 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.
 
 #include "courgette/image_info.h"
 
 #include <memory.h>
 #include <algorithm>
 #include <map>
 #include <set>
@@ skipping 292 matching lines @@
     // header to see if the section contains instructions.
     if (memcmp(section->name, ".text", 6) == 0)
       has_text_section_ = true;
 
     uint32 section_end =
         section->file_offset_of_raw_data + section->size_of_raw_data;
     if (section_end > file_length_)
       file_length_ = section_end;
   }
 
+  if (!is_32bit()) {
+    return Bad("64 bit executables are not yet supported");
+  }
+
+  if (!has_text_section()) {
+    return Bad("Resource-only executables are not yet supported");
+  }
+
   failure_reason_ = NULL;
   return true;
 }
 
 bool PEInfo::ReadDataDirectory(int index, ImageDataDirectory* directory) {
   if (index < number_of_data_directories_) {
     size_t offset = index * 8 + offset_of_data_directories_;
     if (offset >= size_of_optional_header_)
       return Bad("number of data directories inconsistent");
     const uint8* data_directory = optional_header_ + offset;
@@ skipping 79 matching lines @@
 
     block += size;
   }
 
   std::sort(relocs->begin(), relocs->end());
 
   return true;
 }
 
 }  // namespace courgette