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-rw-r--r--third_party/wasm2c/include/wabt/string-format.h68
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
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+++ b/third_party/wasm2c/include/wabt/string-format.h
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+/*
+ * 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_