Make case sensitivity of skipPartial optional

Author: mrossinek

src/Datetime.cpp

@@ -1505,7 +1505,7 @@ bool Datetime::initializeDayName (Pig& pig)
   std::string token;
   for (int day = 0; day <= 7; ++day)   // Deliberate <= so that 'sunday' is either 0 or 7.
   {
-    if (pig.skipPartial (dayNames[day % 7], token) &&
+    if (pig.skipPartial (dayNames[day % 7], token, true) &&
         token.length () >= static_cast <std::string::size_type> (Datetime::minimumMatchLength))
     {
       auto following = pig.peek ();
@@ -1548,7 +1548,7 @@ bool Datetime::initializeMonthName (Pig& pig)
   std::string token;
   for (int month = 0; month < 12; ++month)
   {
-    if (pig.skipPartial (monthNames[month], token) &&
+    if (pig.skipPartial (monthNames[month], token, true) &&
         token.length () >= static_cast <std::string::size_type> (Datetime::minimumMatchLength))
     {
       auto following = pig.peek ();

src/Pig.cpp

@@ -103,13 +103,15 @@ bool Pig::skipLiteral (const std::string& literal)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-bool Pig::skipPartial (const std::string& reference, std::string& result)
+bool Pig::skipPartial (const std::string& reference, std::string& result,
+                       bool ignore_case)
 {
   // Walk the common substring.
   auto pos = 0;
   while (reference[pos] &&
          (*_text)[_cursor + pos] &&
-         reference[pos] == tolower((*_text)[_cursor + pos]))
+         ((reference[pos] == (*_text)[_cursor + pos] && !ignore_case) ||
+          (reference[pos] == tolower((*_text)[_cursor + pos]) && ignore_case)))
     ++pos;
 
   if (pos > 0)

src/Pig.h

@@ -40,7 +40,7 @@ class Pig
   bool skipN (const int quantity = 1);
   bool skipWS ();
   bool skipLiteral (const std::string&);
-  bool skipPartial (const std::string&, std::string&);
+  bool skipPartial (const std::string&, std::string&, bool ignore_case = false);
 
   bool getUntil (int, std::string&);
   bool getUntilWS (std::string&);