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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
*
*
* 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_