simplify string utilities

webcc/string.cc

@@ -2,10 +2,12 @@
 
 #include <random>
 
+#include "boost/algorithm/string/trim.hpp"
+
 namespace webcc {
 
 // Ref: https://stackoverflow.com/a/24586587
-std::string random_string(std::size_t length) {
+std::string RandomString(std::size_t length) {
   static const char chrs[] =
       "0123456789"
       "abcdefghijklmnopqrstuvwxyz"
@@ -13,7 +15,7 @@ std::string random_string(std::size_t length) {
 
   thread_local static std::mt19937 rg{ std::random_device{}() };
   thread_local static std::uniform_int_distribution<std::string::size_type>
-      pick(0, sizeof(chrs) - 2);
+      pick{ 0, sizeof(chrs) - 2 };
 
   std::string s;
   s.reserve(length);
@@ -25,7 +27,7 @@ std::string random_string(std::size_t length) {
   return s;
 }
 
-bool to_size_t(const std::string& str, int base, std::size_t* size) {
+bool ToSizeT(const std::string& str, int base, std::size_t* size) {
   try {
     *size = static_cast<std::size_t>(std::stoul(str, 0, base));
   } catch (const std::exception&) {
@@ -34,19 +36,42 @@ bool to_size_t(const std::string& str, int base, std::size_t* size) {
   return true;
 }
 
-bool split_kv(std::string& key, std::string& value, const std::string& str,
-              char delim, bool trim_spaces) {
-  std::size_t pos = str.find(delim);
+void Split(boost::string_view input, char delim, bool compress_token,
+           std::vector<boost::string_view>* output) {
+  std::size_t i = 0;
+  std::size_t p = 0;
+
+  i = input.find(delim);
+
+  while (i != boost::string_view::npos) {
+    output->emplace_back(input.substr(p, i - p));
+    p = i + 1;
+
+    if (compress_token) {
+      while (input[p] == delim) {
+        ++p;
+      }
+    }
+
+    i = input.find(delim, p);
+  }
+
+  output->emplace_back(input.substr(p, i - p));
+}
+
+bool SplitKV(const std::string& input, char delim, bool trim_spaces,
+             std::string* key, std::string* value) {
+  std::size_t pos = input.find(delim);
   if (pos == std::string::npos) {
     return false;
   }
 
-  key = str.substr(0, pos);
-  value = str.substr(pos + 1);
+  *key = input.substr(0, pos);
+  *value = input.substr(pos + 1);
 
   if (trim_spaces) {
-    trim(key);
-    trim(value);
+    boost::trim(*key);
+    boost::trim(*value);
   }
 
   return true;