Method compare

paddle/phi/common/pstring.h:233–243

// Comparison

HOSTDEVICE inline int pstring::compare(const char* str, size_t len) const {
  int ret = PD_Memcmp(data(), str, (len < size()) ? len : size());

  if (ret < 0) return -1;
  if (ret > 0) return +1;

  if (size() < len) return -1;
  if (size() > len) return +1;

  return 0;
}

HOSTDEVICE inline bool pstring::operator<(const pstring& o) const {
  return compare(o.data(), o.size()) < 0;