64   StringPiece() : ptr_(NULL), length_(0) {}  in StringPiece()
66       : ptr_(str), length_((str == NULL) ? 0 : strlen(str)) {}  in StringPiece()
67   StringPiece(const std::string& str) : ptr_(str.data()), length_(str.size()) {}  in StringPiece()
69       : ptr_(str.data()), length_(str.size()) {}  in StringPiece()
70   StringPiece(const char* offset, size_type len) : ptr_(offset), length_(len) {}  in StringPiece()
77   size_type size() const { return length_; }  in size()
78   size_type length() const { return length_; }  in length()
79   bool empty() const { return length_ == 0; }  in empty()
83     length_ = 0;  in clear()
87     length_ = len;  in set()
91     length_ = str ? strlen(str) : 0;  in set()
95     length_ = len;  in set()
102     length_ -= n;  in remove_prefix()
105   void remove_suffix(size_type n) { length_ -= n; }  in remove_suffix()
109         wordmemcmp(ptr_, x.ptr_, (length_ < x.length_ ? length_ : x.length_));  in compare()
111       if (length_ < x.length_)  in compare()
113       else if (length_ > x.length_)  in compare()
129     return ((length_ >= x.length_) &&  in starts_with()
130             (wordmemcmp(ptr_, x.ptr_, x.length_) == 0));  in starts_with()
135     return ((length_ >= x.length_) &&  in ends_with()
136             (wordmemcmp(ptr_ + (length_ - x.length_), x.ptr_, x.length_) == 0));  in ends_with()
140   iterator end() const { return ptr_ + length_; }  in end()
142     return const_reverse_iterator(ptr_ + length_);  in rbegin()
146   size_type max_size() const { return length_; }  in max_size()
147   size_type capacity() const { return length_; }  in capacity()
177   char get(size_type i) const { return i < length_ ? ptr_[i] : 0; }  in get()
181   size_type length_;  variable