63   const char*   ptr_;
71     : ptr_(NULL), length_(0) { }  in StringPiece()
73     : ptr_(str), length_(static_cast<int>(strlen(ptr_))) { }  in StringPiece()
75     : ptr_(reinterpret_cast<const char*>(str)),  in StringPiece()
76       length_(static_cast<int>(strlen(ptr_))) { }  in StringPiece()
78     : ptr_(str.data()), length_(static_cast<int>(str.size())) { }  in StringPiece()
80     : ptr_(offset), length_(len) { }  in StringPiece()
88   const char* data() const { return ptr_; }  in data()
92   void clear() { ptr_ = NULL; length_ = 0; }  in clear()
93   void set(const char* buffer, int len) { ptr_ = buffer; length_ = len; }  in set()
95     ptr_ = str;  in set()
99     ptr_ = reinterpret_cast<const char*>(buffer);  in set()
103   char operator[](int i) const { return ptr_[i]; }
106     ptr_ += n;  in remove_prefix()
116             (memcmp(ptr_, x.ptr_, length_) == 0));
124     int r = memcmp(ptr_, x.ptr_, length_ < x.length_ ? length_ : x.length_); \
134     int r = memcmp(ptr_, x.ptr_, length_ < x.length_ ? length_ : x.length_);  in compare()
147     target->assign(ptr_, length_);  in CopyToString()
152     return ((length_ >= x.length_) && (memcmp(ptr_, x.ptr_, x.length_) == 0));  in starts_with()