37 std::vector<std::string> Split(const std::string& s,  in Split()  argument
46     found = s.find_first_of(delimiters, base);  in Split()
47     result.push_back(s.substr(base, found - base));  in Split()
48     if (found == s.npos) break;  in Split()
55 std::vector<std::string> Tokenize(const std::string& s, const std::string& delimiters) {  in Tokenize()  argument
62     size_t base = s.find_first_not_of(delimiters, end);  in Tokenize()
63     if (base == s.npos) {  in Tokenize()
66     end = s.find_first_of(delimiters, base);  in Tokenize()
67     result.push_back(s.substr(base, end - base));  in Tokenize()
72 std::string Trim(const std::string& s) {  in Trim()  argument
75   if (s.size() == 0) {  in Trim()
80   size_t end_index = s.size() - 1;  in Trim()
83   while (start_index < s.size()) {  in Trim()
84     if (!isspace(s[start_index])) {  in Trim()
92     if (!isspace(s[end_index])) {  in Trim()
103   return s.substr(start_index, end_index - start_index + 1);  in Trim()
113 bool StartsWith(std::string_view s, std::string_view prefix) {  in StartsWith()  argument
114   return s.substr(0, prefix.size()) == prefix;  in StartsWith()
117 bool StartsWith(std::string_view s, char prefix) {  in StartsWith()  argument
118   return !s.empty() && s.front() == prefix;  in StartsWith()
121 bool StartsWithIgnoreCase(std::string_view s, std::string_view prefix) {  in StartsWithIgnoreCase()  argument
122   return s.size() >= prefix.size() && strncasecmp(s.data(), prefix.data(), prefix.size()) == 0;  in StartsWithIgnoreCase()
125 bool EndsWith(std::string_view s, std::string_view suffix) {  in EndsWith()  argument
126   return s.size() >= suffix.size() && s.substr(s.size() - suffix.size(), suffix.size()) == suffix;  in EndsWith()
129 bool EndsWith(std::string_view s, char suffix) {  in EndsWith()  argument
130   return !s.empty() && s.back() == suffix;  in EndsWith()
133 bool EndsWithIgnoreCase(std::string_view s, std::string_view suffix) {  in EndsWithIgnoreCase()  argument
134   return s.size() >= suffix.size() &&  in EndsWithIgnoreCase()
135          strncasecmp(s.data() + (s.size() - suffix.size()), suffix.data(), suffix.size()) == 0;  in EndsWithIgnoreCase()
142 std::string StringReplace(std::string_view s, std::string_view from, std::string_view to,  in StringReplace()  argument
144   if (from.empty()) return std::string(s);  in StringReplace()
149     std::string_view::size_type pos = s.find(from, start_pos);  in StringReplace()
152     result.append(s.data() + start_pos, pos - start_pos);  in StringReplace()
157   result.append(s.data() + start_pos, s.size() - start_pos);  in StringReplace()