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 // Copyright 2014 Google Inc. All Rights Reserved.                                                  

 //                                                                                                  

 // Licensed under the Apache License, Version 2.0 (the "License");                                  

 // you may not use this file except in compliance with the License.                                 

 // You may obtain a copy of the License at                                                          

 //                                                                                                  

 //     http://www.apache.org/licenses/LICENSE-2.0                                                   

 //                                                                                                  

 // Unless required by applicable law or agreed to in writing, software                              

 // distributed under the License is distributed on an "AS IS" BASIS,                                

 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.                         

 // See the License for the specific language governing permissions and                              

 // limitations under the License.

 #ifndef CLD2_INTERNAL_CLD2_DYNAMIC_DATA_LOADER_H_

 #define CLD2_INTERNAL_CLD2_DYNAMIC_DATA_LOADER_H_

 #include "scoreonescriptspan.h"

 #include "cld2_dynamic_data.h"

 namespace CLD2DynamicDataLoader {

 // Read a header from the specified file and return it.

 // The header returned is dynamically allocated; you must 'delete' the array

 // of TableHeaders as well as the returned FileHeader* when done.

 CLD2DynamicData::FileHeader* loadHeader(const char* fileName);

 // Load data directly into a ScoringTables structure using a private, read-only

 // mmap and return the newly-allocated structure.

 // The out-parameter "mmapAddressOut" is a pointer to a void*; the starting

 // address of the mmap()'d block will be written here.

 // The out-parameter "mmapLengthOut" is a pointer to an int; the length of the

 // mmap()'d block will be written here.

 // It is up to the caller to delete

 CLD2::ScoringTables* loadDataFile(const char* fileName,

   void** mmapAddressOut, int* mmapLengthOut);

 // Given pointers to the data from a previous invocation of loadDataFile,

 // unloads the data safely - freeing and deleting any malloc'd/new'd objects.

 // When this method returns, the mmap has been deleted, as have all the scoring

 // tables; the pointers passed in are all zeroed, such that:

 //   *scoringTables == NULL

 //   *mmapAddress == NULL

 //   mmapLength == NULL

 // This is the only safe way to unload data that was previously loaded, as there

 // is an unfortunate mixture of new and malloc involved in building the

 // in-memory represtation of the data.

 void unloadData(CLD2::ScoringTables** scoringTables,

   void** mmapAddress, int* mmapLength);

 } // End namespace CLD2DynamicDataExtractor

 #endif  // CLD2_INTERNAL_CLD2_DYNAMIC_DATA_EXTRACTOR_H_