57   size_type ret = std::min(length_ - pos, n);  in copy()
63   if (pos > length_)  in find()
67       std::search(ptr_ + pos, ptr_ + length_, s.ptr_, s.ptr_ + s.length_);  in find()
69   return xpos + s.length_ <= length_ ? xpos : npos;  in find()
73   if (pos >= length_)  in find()
76   const char* result = std::find(ptr_ + pos, ptr_ + length_, c);  in find()
77   return result != ptr_ + length_ ? static_cast<size_t>(result - ptr_) : npos;  in find()
81   if (length_ < s.length_)  in rfind()
85     return std::min(length_, pos);  in rfind()
87   const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_;  in rfind()
88   const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);  in rfind()
93   if (length_ == 0)  in rfind()
96   for (size_type i = std::min(pos, length_ - 1);; --i) {  in rfind()
124   if (length_ == 0 || s.length_ == 0)  in find_first_of()
128   if (s.length_ == 1)  in find_first_of()
133   for (size_type i = pos; i < length_; ++i) {  in find_first_of()
143   if (length_ == 0)  in find_first_not_of()
146   if (s.length_ == 0)  in find_first_not_of()
150   if (s.length_ == 1)  in find_first_not_of()
155   for (size_type i = pos; i < length_; ++i) {  in find_first_not_of()
164   if (length_ == 0)  in find_first_not_of()
167   for (; pos < length_; ++pos) {  in find_first_not_of()
176   if (length_ == 0 || s.length_ == 0)  in find_last_of()
180   if (s.length_ == 1)  in find_last_of()
185   for (size_type i = std::min(pos, length_ - 1);; --i) {  in find_last_of()
196   if (length_ == 0)  in find_last_not_of()
199   size_type i = std::min(pos, length_ - 1);  in find_last_not_of()
200   if (s.length_ == 0)  in find_last_not_of()
204   if (s.length_ == 1)  in find_last_not_of()
219   if (length_ == 0)  in find_last_not_of()
222   for (size_type i = std::min(pos, length_ - 1);; --i) {  in find_last_not_of()
232   if (pos > length_)  in substr()
233     pos = length_;  in substr()
234   if (n > length_ - pos)  in substr()
235     n = length_ - pos;  in substr()