simplify string utilities

webcc/string.h

@@ -1,92 +1,30 @@
 #ifndef WEBCC_STRING_H_
 #define WEBCC_STRING_H_
 
-#include <algorithm>
-#include <iterator>
-#include <sstream>
 #include <string>
+#include <vector>
+
+#include "boost/utility/string_view.hpp"
 
 namespace webcc {
 
 // Get a randomly generated string with the given length.
-std::string random_string(std::size_t length);
+std::string RandomString(std::size_t length);
 
 // Convert string to size_t.
-bool to_size_t(const std::string& str, int base, std::size_t* size);
+// Just a wrapper of std::stoul.
+bool ToSizeT(const std::string& str, int base, std::size_t* size);
 
-inline std::string toupper(std::string s) {
-  std::transform(s.begin(), s.end(), s.begin(),
-                 [](unsigned char c) { return std::toupper(c); });
-  return s;
-}
-
-inline std::string tolower(std::string s) {
-  std::transform(s.begin(), s.end(), s.begin(),
-                 [](unsigned char c) { return std::tolower(c); });
-  return s;
-}
-
-inline bool iequals(const std::string& str1, const std::string& str2) {
-  if (str1.size() != str2.size()) {
-    return false;
-  }
-
-  return std::equal(str1.begin(), str1.end(), str2.begin(), [](int c1, int c2) {
-    return std::toupper(c1) == std::toupper(c2);
-  });
-}
-
-inline bool starts_with(const std::string& str, const std::string& sub) {
-  if (sub.empty()) {
-    return false;
-  }
-  return str.find(sub) == 0;
-}
-
-inline std::string& ltrim(std::string& str, const std::string& chars = "\t ") {
-  str.erase(0, str.find_first_not_of(chars));
-  return str;
-}
-
-inline std::string& rtrim(std::string& str, const std::string& chars = "\t ") {
-  str.erase(str.find_last_not_of(chars) + 1);
-  return str;
-}
-
-inline std::string& trim(std::string& str, const std::string& chars = "\t ") {
-  return ltrim(rtrim(str, chars), chars);
-}
-
-// \param compress_token Same as boost::token_compress_on, especially useful
-//                       when the delimeter is space.
-template <class Container>
-void split(Container& cont, const std::string& str, char delim = ' ',
-           bool compress_token = false) {
-  std::size_t i = 0;
-  std::size_t p = 0;
-
-  i = str.find(delim);
-
-  while (i != std::string::npos) {
-    cont.push_back(str.substr(p, i - p));
-    p = i + 1;
-
-    if (compress_token) {
-      while (str[p] == delim) {
-        ++p;
-      }
-    }
-
-    i = str.find(delim, p);
-  }
-
-  cont.push_back(str.substr(p, i - p));
-}
+// Split string without copy.
+// |compress_token| is the same as boost::token_compress_on for boost::split.
+void Split(boost::string_view input, char delim, bool compress_token,
+           std::vector<boost::string_view>* output);
 
 // Split a key-value string.
 // E.g., split "Connection: Keep-Alive".
-bool split_kv(std::string& key, std::string& value, const std::string& str,
-              char delim, bool trim_spaces = true);
+// TODO: Use string_view (blocked by trim)
+bool SplitKV(const std::string& input, char delim, bool trim_spaces,
+             std::string* key, std::string* value);
 
 }  // namespace webcc