| /* Copyright 2016 Google Inc. |
| * |
| * 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 __REGION_HH__ |
| #define __REGION_HH__ |
| |
| #include <assert.h> |
| |
| #include <cassert> |
| #include <cstdint> |
| #include <string> |
| #include <vector> |
| |
| namespace dcdir |
| { |
| |
| class ImageBuffer; |
| |
| class Region |
| { |
| public: |
| Region(const ImageBuffer &image, const std::string &new_name, |
| uint32_t new_base, uint32_t new_offset, uint32_t new_length, |
| bool new_directory); |
| |
| Region(const ImageBuffer &image, const std::string &new_name, |
| uint32_t dir_offset, uint32_t ptr_offset); |
| |
| // Return the name of this region. |
| const std::string &name() const |
| { |
| return name_; |
| } |
| |
| // Return the "base" of this region, ie. the offset of the directory |
| // table within this region. Only meaningful for directories. |
| uint32_t base() const |
| { |
| return base_; |
| } |
| |
| // Return this region's offset within the image. |
| uint32_t offset() const |
| { |
| return offset_; |
| } |
| |
| // Return this region's length. |
| uint32_t length() const |
| { |
| return length_; |
| } |
| |
| // Return the size of the pointer which pointed to this region. |
| uint32_t ptr_size() const |
| { |
| assert(ptr_size_); |
| return ptr_size_; |
| } |
| |
| // Return the type of the pointer to this region. |
| uint8_t type() const |
| { |
| return type_; |
| } |
| |
| // Return whether this region is a directory. |
| bool directory() const |
| { |
| return directory_; |
| } |
| |
| std::vector<Region *> &entries() |
| { |
| return entries_; |
| } |
| |
| // Return the number of bytes occupied by the dcdir structures |
| // themselves. |
| size_t storage_overhead() const; |
| |
| private: |
| // Process the content of this region as a directory, and fill in |
| // those fields of this object. |
| void process_as_directory(const ImageBuffer &image); |
| |
| // The name of this region in its parent directory. |
| std::string name_; |
| |
| // The offset of the directory table in this region, if it's a |
| // directory. |
| uint64_t base_; |
| // The offset of this region relative to its parent directory. |
| uint64_t offset_; |
| // The length of this region. |
| uint64_t length_; |
| // The size of the pointer that points to this region. |
| uint32_t ptr_size_; |
| // The type of the pointer. |
| uint8_t type_; |
| // Whether this region is a directory. |
| bool directory_; |
| // The size of the directory table in this region, if any. |
| uint32_t table_size_; |
| // If this region is a directory, the entries within it. |
| std::vector<Region *> entries_; |
| }; |
| |
| } // namespace dcdir |
| |
| #endif // __REGION_HH__ |