Refactor tar code to support long names....

import/cross/tar_generator.h

Index: import/cross/tar_generator.h
===================================================================
--- import/cross/tar_generator.h	(revision 21085)
+++ import/cross/tar_generator.h	(working copy)
@@ -67,7 +67,7 @@
 
   // Call AddFile() for each file entry, followed by calls to AddFileBytes()
   // for the file's data
-  virtual void AddFile(const String &file_name,
+  virtual bool AddFile(const String &file_name,

[Chris Rogers, 2009/07/21 19:14:28]

add comment about return value

                        size_t file_size);
 
   // Call to "push" bytes to be processed - our client will get called back
@@ -79,16 +79,25 @@
   virtual void Finalize();
 
  private:
-  void AddEntry(const String &file_name,
+  bool AddEntry(const String &file_name,

[Chris Rogers, 2009/07/21 19:14:28]

add comment about return value

                 size_t file_size,
                 bool is_directory);
 
-  void AddDirectory(const String &file_name);
-  void AddDirectoryEntryIfNeeded(const String &file_name);
+  bool AddDirectory(const String &file_name);

[Chris Rogers, 2009/07/21 19:14:28]

comment about return value

+  bool AddDirectoryEntryIfNeeded(const String &file_name);
 
   // Checksum for each header
   void ComputeCheckSum(uint8 *header);
 
+  // Writes a head block.
+  void WriteHeader(const String& filename,
+                   size_t file_size,
+                   char type,
+                   int mode,
+                   int user_id,
+                   int group_id,
+                   int mod_time);
+
   // flushes buffered file data to the client callback
   // if |flush_padding_zeroes| is |true| then flush a complete block
   // with zero padding even if less was buffered