1 files changed, 82 insertions, 0 deletions
diff --git a/third_party/wasm2c/include/wabt/string-util.h b/third_party/wasm2c/include/wabt/string-util.h
new file mode 100644
index 0000000000..28734d504b
--- /dev/null
+++ b/third_party/wasm2c/include/wabt/string-util.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2017 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.
+ */
+
+#ifndef WABT_STRING_UTIL_H_
+#define WABT_STRING_UTIL_H_
+
+#include <string>
+#include <string_view>
+
+namespace wabt {
+
+inline std::string& operator+=(std::string& x, std::string_view y) {
+  x.append(y.data(), y.size());
+  return x;
+}
+
+inline std::string operator+(std::string_view x, std::string_view y) {
+  std::string s;
+  s.reserve(x.size() + y.size());
+  s.append(x.data(), x.size());
+  s.append(y.data(), y.size());
+  return s;
+}
+
+inline std::string operator+(const std::string& x, std::string_view y) {
+  return std::string_view(x) + y;
+}
+
+inline std::string operator+(std::string_view x, const std::string& y) {
+  return x + std::string_view(y);
+}
+
+inline std::string operator+(const char* x, std::string_view y) {
+  return std::string_view(x) + y;
+}
+
+inline std::string operator+(std::string_view x, const char* y) {
+  return x + std::string_view(y);
+}
+
+inline void cat_concatenate(std::string&) {}
+
+template <typename T, typename... Ts>
+void cat_concatenate(std::string& s, const T& t, const Ts&... args) {
+  s += t;
+  cat_concatenate(s, args...);
+}
+
+inline size_t cat_compute_size() {
+  return 0;
+}
+
+template <typename T, typename... Ts>
+size_t cat_compute_size(const T& t, const Ts&... args) {
+  return std::string_view(t).size() + cat_compute_size(args...);
+}
+
+// Is able to concatenate any combination of string/string_view/char*
+template <typename... Ts>
+std::string cat(const Ts&... args) {
+  std::string s;
+  s.reserve(cat_compute_size(args...));
+  cat_concatenate(s, args...);
+  return s;
+}
+
+}  // namespace wabt
+
+#endif  // WABT_STRING_UTIL_H_