src/kenlm/util/stream/block.hh

#ifndef UTIL_STREAM_BLOCK_H
#define UTIL_STREAM_BLOCK_H

#include <cstddef>
#include <stdint.h>

namespace util {
namespace stream {

class Block {
  public:

    Block() : mem_(NULL), valid_size_(0) {}

    Block(void *mem, std::size_t size) : mem_(mem), valid_size_(size) {}

    void SetValidSize(std::size_t to) { valid_size_ = to; }

    std::size_t ValidSize() const { return valid_size_; }

    void *Get() { return mem_; }

    const void *Get() const { return mem_; }


    const void *ValidEnd() const {
      return reinterpret_cast<const uint8_t*>(mem_) + valid_size_;
    }

    operator bool() const { return mem_ != NULL; }

    bool operator!() const { return mem_ == NULL; }

  private:
    friend class Link;
    friend class RewindableStream;

    void SetToPoison() {
      mem_ = NULL;
    }

    void *mem_;
    std::size_t valid_size_;
};

} // namespace stream
} // namespace util

#endif // UTIL_STREAM_BLOCK_H