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diff --git a/src/support/string.h b/src/support/string.h
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+++ b/src/support/string.h
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+/*
+ * Copyright 2019 WebAssembly Community Group participants
+ *
+ * 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.
+ */
+
+//
+// String helpers.
+//
+
+#ifndef wasm_support_string_h
+#define wasm_support_string_h
+
+#include <string>
+#include <vector>
+
+namespace wasm {
+
+namespace String {
+
+// Creates a vector of the split parts of a string, by a delimiter.
+class Split : public std::vector<std::string> {
+public:
+  Split(const std::string& input, const std::string& delim) {
+    size_t lastEnd = 0;
+    while (lastEnd < input.size()) {
+      auto nextDelim = input.find(delim, lastEnd);
+      if (nextDelim == std::string::npos) {
+        nextDelim = input.size();
+      }
+      (*this).push_back(input.substr(lastEnd, nextDelim - lastEnd));
+      lastEnd = nextDelim + delim.size();
+    }
+  }
+};
+
+// Does a simple wildcard match between a pattern and a value. Currently
+// supports a '*' at the end of the pattern.
+inline bool wildcardMatch(const std::string& pattern,
+                          const std::string& value) {
+  for (size_t i = 0; i < pattern.size(); i++) {
+    if (i >= value.size()) {
+      return false;
+    }
+    if (pattern[i] == '*') {
+      return true;
+    }
+    if (pattern[i] != value[i]) {
+      return false;
+    }
+  }
+  return value.size() == pattern.size();
+}
+
+} // namespace String
+
+} // namespace wasm
+
+#endif // wasm_support_string_h