1 files changed, 64 insertions, 0 deletions
diff --git a/Source/Internal/comma_separated_list.h b/Source/Internal/comma_separated_list.h
new file mode 100644
index 00000000..8dc9890d
--- /dev/null
+++ b/Source/Internal/comma_separated_list.h
@@ -0,0 +1,64 @@
+//-----------------------------------------------------------------------------
+//           Name: comma_separated_list.h
+//      Developer: Wolfire Games LLC
+//    Description: 
+//        License: Read below
+//-----------------------------------------------------------------------------
+//
+//   Copyright 2022 Wolfire Games LLC
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+//-----------------------------------------------------------------------------
+#pragma once
+
+#include <string>
+
+// The CSL iterator iterates over the tokens of a comma-separated list, e.g.
+// for "a, b,   c" it will return "a", "b" and "c".
+struct CSLIterator {
+    std::string str_;
+    int start_, comma_pos_;
+
+    CSLIterator(const std::string& str)
+        :start_(0), comma_pos_(0)
+    {
+        str_ = str;
+    }
+
+    bool GetNext(std::string *str){
+        if(comma_pos_ == (int)str_.length()){
+            return false;
+        }
+        int end = (int) str_.length();
+        comma_pos_ = (int) str_.length();
+        for(int i=start_; i<end; ++i){
+            if(str_[i] == ','){
+                comma_pos_ = i;
+                break;
+            }
+        }
+        while(str_[start_] == ' '){
+            ++start_;
+        }
+        end = comma_pos_ - 1;
+        while(str_[end] == ' '){
+            --end;
+        }
+        if(str){
+            (*str) = str_.substr(start_, end-start_+1);
+        }
+        start_ = comma_pos_ + 1;
+        return true;
+    }
+};