text: /*
   * Copyright 2014 The Android Open Source Project
   *
   * 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 IMG_UTILS_FILE_INPUT_H
  #define IMG_UTILS_FILE_INPUT_H
  
  #include <img_utils/Input.h>
  
  #include <cutils/compiler.h>
  #include <utils/Errors.h>
  #include <utils/String8.h>
  #include <stdio.h>
  #include <stdint.h>
  
  namespace android {
  namespace img_utils {
  
  /**
   * Utility class for reading from a file.
   */
  class ANDROID_API FileInput : public Input {
      public:
          /**
           * Create a file input for the given path.
           */
          explicit FileInput(String8 path);
  
          virtual ~FileInput();
  
          /**
           * Open a file descriptor to the path given in the constructor.
           *
           * Returns OK on success, or a negative error code.
           */
          virtual status_t open();
  
          /**
           * Read bytes from the file into the given buffer.  At most, the number
           * of bytes given in the count argument will be read.  Bytes will be written
           * into the given buffer starting at the index given in the offset argument.
           *
           * Returns the number of bytes read, or NOT_ENOUGH_DATA if at the end of the file.  If an
           * error has occurred, this will return a negative error code other than NOT_ENOUGH_DATA.
           */
          virtual ssize_t read(uint8_t* buf, size_t offset, size_t count);
  
          /**
           * Close the file descriptor to the path given in the constructor.
           *
           * Returns OK on success, or a negative error code.
           */
          virtual status_t close();
      private:
          FILE *mFp;
          String8 mPath;
          bool mOpen;
  };
  
  } /*namespace img_utils*/
  } /*namespace android*/
  
  
  #endif /*IMG_UTILS_INPUT_H*/
  