Method MappedZipArchive

src/ResourceProvider.cpp:222–256

class MappedZipArchive {
public:
  explicit MappedZipArchive(const std::string& path) : fileName(path) {
    if (!GetFileFreshnessCacheKey(path, &cacheKey)) {
      throw FileNotFound(path);
    }
#if defined(_WIN32) || defined(_WIN64)
    buffer = ReadBinaryFile(path);
    data = buffer.empty() ? nullptr : buffer.data();
    size = buffer.size();
#else
    fd = open(path.c_str(), O_RDONLY);
    if (fd < 0) {
      throw FileNotFound(path);
    }
    struct stat info;
    if (fstat(fd, &info) != 0 || info.st_size < 0) {
      close(fd);
      fd = -1;
      throw FileNotFound(path);
    }
    size = static_cast<size_t>(info.st_size);
    if (size == 0) {
      close(fd);
      fd = -1;
      data = nullptr;
      return;
    }
    void* mapped = mmap(nullptr, size, PROT_READ, MAP_PRIVATE, fd, 0);
    if (mapped == MAP_FAILED) {
      close(fd);
      fd = -1;
      throw FileNotFound(path);
    }
    data = static_cast<const unsigned char*>(mapped);
#endif
  }

  MappedZipArchive(const MappedZipArchive&) = delete;
  MappedZipArchive& operator=(const MappedZipArchive&) = delete;