Store 'diff' bytes by run-length encoding zeros....

courgette/courgette.h

 // 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.
 
 #ifndef COURGETTE_COURGETTE_H_
 #define COURGETTE_COURGETTE_H_
 
 namespace courgette {
 
 // Status codes for Courgette APIs.
 //
 // Client code should only rely on the distintion between C_OK and the other
 // status codes.
 //
 enum Status {
   C_OK = 1,                       // Successful operation.
 
   C_GENERAL_ERROR = 2,            // Error other than listed below.
 
   C_READ_OPEN_ERROR = 3,          // Could not open input file for reading.
   C_READ_ERROR = 4,               // Could not read from opened input file.
 
   C_WRITE_OPEN_ERROR = 3,         // Could not open output file for writing.
   C_WRITE_ERROR = 4,              // Could not write to opened output file.
 
   C_BAD_ENSEMBLE_MAGIC = 5,       // Ensemble patch has bad magic.
   C_BAD_ENSEMBLE_VERSION = 6,     // Ensemble patch has wrong version.
   C_BAD_ENSEMBLE_HEADER = 7,      // Ensemble patch has corrupt header.
-  C_BAD_ENSEMBLE_CRC = 8,         // Ensemble patch has corrupt header.
+  C_BAD_ENSEMBLE_CRC = 8,         // Ensemble patch has corrupt data.
 
   C_BAD_TRANSFORM = 12,           // Transform mis-specified.
   C_BAD_BASE = 13,                // Base for transform malformed.
 
   C_BINARY_DIFF_CRC_ERROR = 14,   // Internal diff input doesn't have expected
                                   // CRC.
 
   // Internal errors.
   C_STREAM_ERROR = 20,            // Unexpected error from streams.h.
   C_STREAM_NOT_CONSUMED = 21,     // Stream has extra data, is expected to be
@@ skipping 69 matching lines @@
 
 // Used to free an EncodedProgram returned by other APIs.
 void DeleteEncodedProgram(EncodedProgram* encoded);
 
 // Adjusts |program| to look more like |model|.
 //
 Status Adjust(const AssemblyProgram& model, AssemblyProgram *program);
 
 }  // namespace courgette
 #endif  // COURGETTE_COURGETTE_H_