Function trim_spaces

paddle/utils/string/string_helper.cc:26–40

remove leading and tailing spaces

// remove leading and tailing spaces
std::string trim_spaces(const std::string& str) {
  const char* p = str.c_str();

  while (*p != 0 && isspace(*p)) {
    p++;
  }

  size_t len = strlen(p);

  while (len > 0 && isspace(p[len - 1])) {
    len--;
  }

  return std::string(p, len);
}

std::string erase_spaces(const std::string& str) {
  std::string result;