// Copyright 2009 Google Inc. All Rights Reserved.

#include "file.h"

namespace art {

bool File::ReadFully(void* buffer, int64_t num_bytes) {
  int64_t remaining = num_bytes;
  char* current_buffer = reinterpret_cast<char*>(buffer);
  while (remaining > 0) {
    int bytes_read = Read(current_buffer, remaining);
    if (bytes_read <= 0) {
      return false;
    }
    remaining -= bytes_read;  // Reduce the number of remaining bytes.
    current_buffer += bytes_read;  // Move the buffer forward.
  }
  return true;
}


bool File::WriteFully(const void* buffer, int64_t num_bytes) {
  int64_t remaining = num_bytes;
  const char* current_buffer = reinterpret_cast<const char*>(buffer);
  while (remaining > 0) {
    int bytes_read = Write(current_buffer, remaining);
    if (bytes_read < 0) {
      return false;
    }
    remaining -= bytes_read;  // Reduce the number of remaining bytes.
    current_buffer += bytes_read;  // Move the buffer forward.
  }
  return true;
}

}  // namespace art