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      1 /*
      2  * Copyright (C) 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 __READ_WRITE_UTILS_H__
     18 #define __READ_WRITE_UTILS_H__
     19 
     20 #include <utils/FileMap.h>
     21 #include <drm/drm_framework_common.h>
     22 
     23 namespace android {
     24 
     25 /**
     26  * This is an utility class which performs IO operations.
     27  *
     28  */
     29 class ReadWriteUtils {
     30 public:
     31     /**
     32      * Constructor for ReadWriteUtils
     33      */
     34     ReadWriteUtils() {}
     35 
     36     /**
     37      * Destructor for ReadWriteUtils
     38      */
     39     virtual ~ReadWriteUtils();
     40 
     41 public:
     42     /**
     43      * Reads the data from the file path provided
     44      *
     45      * @param[in] filePath Path of the file
     46      * @return Data read from the file
     47      */
     48     static String8 readBytes(const String8& filePath);
     49     /**
     50      * Reads the data into the given buffer from the file path provided
     51      *
     52      * @param[in] filePath Path of the file
     53      * @param[out] buffer Data read from the file
     54      * @return Length of the data read from the file
     55      */
     56     static int readBytes(const String8& filePath, char** buffer);
     57     /**
     58      * Writes the data into the file path provided
     59      *
     60      * @param[in] filePath Path of the file
     61      * @param[in] dataBuffer Data to write
     62      */
     63     static void writeToFile(const String8& filePath, const String8& data);
     64     /**
     65      * Appends the data into the file path provided
     66      *
     67      * @param[in] filePath Path of the file
     68      * @param[in] dataBuffer Data to append
     69      */
     70     static void appendToFile(const String8& filePath, const String8& data);
     71 
     72 private:
     73     FileMap* mFileMap;
     74 };
     75 
     76 };
     77 
     78 #endif /* __READ_WRITE_UTILS_H__ */
     79 
     80