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      1 /*
      2  * Copyright 2010, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef BCC_CACHEWRITER_H
     18 #define BCC_CACHEWRITER_H
     19 
     20 #include <bcc/bcc_cache.h>
     21 
     22 #include "FileHandle.h"
     23 
     24 #include <map>
     25 #include <string>
     26 #include <utility>
     27 #include <vector>
     28 
     29 namespace bcc {
     30   class Script;
     31 
     32   class CacheWriter {
     33   private:
     34     Script *mpOwner;
     35 
     36     FileHandle *mObjFile;
     37     FileHandle *mInfoFile;
     38 
     39     std::vector<std::pair<char const *, size_t> > mStringPool;
     40 
     41     std::map<std::string,
     42              std::pair<uint32_t, unsigned char const *> > mDependencies;
     43 
     44     OBCC_Header *mpHeaderSection;
     45     OBCC_StringPool *mpStringPoolSection;
     46     OBCC_DependencyTable *mpDependencyTableSection;
     47     //OBCC_RelocationTable *mpRelocationTableSection;
     48     OBCC_ExportVarList *mpExportVarListSection;
     49     OBCC_ExportFuncList *mpExportFuncListSection;
     50     OBCC_PragmaList *mpPragmaListSection;
     51     OBCC_FuncTable *mpFuncTableSection;
     52     OBCC_ObjectSlotList *mpObjectSlotSection;
     53 
     54   public:
     55     CacheWriter()
     56       : mpHeaderSection(NULL), mpStringPoolSection(NULL),
     57         mpDependencyTableSection(NULL), mpExportVarListSection(NULL),
     58         mpExportFuncListSection(NULL), mpPragmaListSection(NULL),
     59         mpFuncTableSection(NULL), mpObjectSlotSection(NULL) {
     60     }
     61 
     62     ~CacheWriter();
     63 
     64     bool writeCacheFile(FileHandle *objFile,
     65                         FileHandle *infoFile,
     66                         Script *S,
     67                         uint32_t libRS_threadable);
     68 
     69     void addDependency(OBCC_ResourceType resType,
     70                        std::string const &resName,
     71                        unsigned char const *sha1) {
     72       mDependencies.insert(std::make_pair(resName,
     73                            std::make_pair((uint32_t)resType, sha1)));
     74     }
     75 
     76   private:
     77     bool prepareHeader(uint32_t libRS_threadable);
     78     bool prepareStringPool();
     79     bool prepareDependencyTable();
     80     bool prepareRelocationTable();
     81     bool prepareExportVarList();
     82     bool prepareExportFuncList();
     83     bool preparePragmaList();
     84     bool prepareFuncTable();
     85     bool prepareObjectSlotList();
     86 
     87     bool writeAll();
     88 
     89     bool calcSectionOffset();
     90     bool calcContextChecksum();
     91 
     92     size_t addString(char const *str, size_t size) {
     93       mStringPool.push_back(std::make_pair(str, size));
     94       return mStringPool.size() - 1;
     95     }
     96 
     97   };
     98 
     99 } // namespace bcc
    100 
    101 #endif // BCC_CACHEWRITER_H
    102