1 files changed, 68 insertions, 0 deletions
diff --git a/third_party/wasm2c/include/wabt/string-format.h b/third_party/wasm2c/include/wabt/string-format.h
new file mode 100644
index 0000000000..892facf27b
--- /dev/null
+++ b/third_party/wasm2c/include/wabt/string-format.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2021 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_FORMAT_H_
+#define WABT_STRING_FORMAT_H_
+
+#include <cstdarg>
+#include <string>
+#include <vector>
+
+#include "wabt/config.h"
+
+#define PRIstringview "%.*s"
+#define WABT_PRINTF_STRING_VIEW_ARG(x) \
+  static_cast<int>((x).length()), (x).data()
+
+#define PRItypecode "%s%#x"
+#define WABT_PRINTF_TYPE_CODE(x) \
+  (static_cast<int32_t>(x) < 0 ? "-" : ""), std::abs(static_cast<int32_t>(x))
+
+#define WABT_DEFAULT_SNPRINTF_ALLOCA_BUFSIZE 128
+#define WABT_SNPRINTF_ALLOCA(buffer, len, format)                          \
+  va_list args;                                                            \
+  va_list args_copy;                                                       \
+  va_start(args, format);                                                  \
+  va_copy(args_copy, args);                                                \
+  char fixed_buf[WABT_DEFAULT_SNPRINTF_ALLOCA_BUFSIZE];                    \
+  char* buffer = fixed_buf;                                                \
+  size_t len = wabt_vsnprintf(fixed_buf, sizeof(fixed_buf), format, args); \
+  va_end(args);                                                            \
+  if (len + 1 > sizeof(fixed_buf)) {                                       \
+    buffer = static_cast<char*>(alloca(len + 1));                          \
+    len = wabt_vsnprintf(buffer, len + 1, format, args_copy);              \
+  }                                                                        \
+  va_end(args_copy)
+
+namespace wabt {
+
+inline std::string WABT_PRINTF_FORMAT(1, 2)
+    StringPrintf(const char* format, ...) {
+  va_list args;
+  va_list args_copy;
+  va_start(args, format);
+  va_copy(args_copy, args);
+  size_t len = wabt_vsnprintf(nullptr, 0, format, args) + 1;  // For \0.
+  std::vector<char> buffer(len);
+  va_end(args);
+  wabt_vsnprintf(buffer.data(), len, format, args_copy);
+  va_end(args_copy);
+  return std::string(buffer.data(), len - 1);
+}
+
+}  // namespace wabt
+
+#endif  // WABT_STRING_FORMAT_H_