1 #ifndef MARISA_ALPHA_TAIL_H_ 2 #define MARISA_ALPHA_TAIL_H_ 3 4 #include "marisa-string.h" 5 #include "vector.h" 6 7 namespace marisa_alpha { 8 9 class Tail { 10 public: 11 Tail(); 12 13 void build(const Vector<String> &keys, 14 Vector<UInt32> *offsets, int mode); 15 16 void mmap(Mapper *mapper, const char *filename, 17 long offset = 0, int whence = SEEK_SET); 18 void map(const void *ptr, std::size_t size); 19 void map(Mapper &mapper); 20 21 void load(const char *filename, 22 long offset = 0, int whence = SEEK_SET); 23 void fread(::FILE *file); 24 void read(int fd); 25 void read(std::istream &stream); 26 void read(Reader &reader); 27 28 void save(const char *filename, bool trunc_flag = true, 29 long offset = 0, int whence = SEEK_SET) const; 30 void fwrite(::FILE *file) const; 31 void write(int fd) const; 32 void write(std::ostream &stream) const; 33 void write(Writer &writer) const; 34 35 const UInt8 *operator[](std::size_t offset) const { 36 MARISA_ALPHA_DEBUG_IF(offset >= buf_.size(), MARISA_ALPHA_PARAM_ERROR); 37 return &buf_[offset]; 38 } 39 40 int mode() const { 41 return (buf_.front() == '\0') ? 42 MARISA_ALPHA_BINARY_TAIL : MARISA_ALPHA_TEXT_TAIL; 43 } 44 bool empty() const { 45 return buf_.empty(); 46 } 47 std::size_t size() const { 48 return buf_.size(); 49 } 50 std::size_t total_size() const { 51 return buf_.total_size(); 52 } 53 54 void clear(); 55 void swap(Tail *rhs); 56 57 private: 58 Vector<UInt8> buf_; 59 60 void build_binary_tail(const Vector<String> &keys, 61 Vector<UInt32> *offsets); 62 bool build_text_tail(const Vector<String> &keys, 63 Vector<UInt32> *offsets); 64 void build_empty_tail(Vector<UInt32> *offsets); 65 66 // Disallows copy and assignment. 67 Tail(const Tail &); 68 Tail &operator=(const Tail &); 69 }; 70 71 } // namespace marisa_alpha 72 73 #endif // MARISA_ALPHA_TAIL_H_ 74
