src/starboard/client_porting/poem/stdio_leaks_poem.h

// Copyright 2019 The Cobalt Authors. All Rights Reserved.
//
// 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.

// This header plugs in the leaks of stdio functions called as std::<function>
// and __builtin_<function>.

// IMPORTANT: This header has to be included as the very first header in a file,
// because the order of the included headers and redefininitions matter.

// In this header, it includes <cstdio> at the very beginning, so that the
// attempts to include <cstdio> afterward are omitted. Then we define a function
// in the std namespace that has the name of the Starboard counterpart of the
// function to be plugged, and redirect it to the Starboard counterpart in the
// global namespace. In this way, the calls to std::<function> will be replaced
// with std::<SbConterpart>, and redirected to ::<SbCounterpart>. With this
// specific order of included headers and redefininitions, it's guaranteed that
// the calls of the functions afterward are cleanly plugged.

#ifndef STARBOARD_CLIENT_PORTING_POEM_STDIO_LEAKS_POEM_H_
#define STARBOARD_CLIENT_PORTING_POEM_STDIO_LEAKS_POEM_H_

#if defined(STARBOARD)

#include <cstdio>

#include "starboard/common/string.h"

namespace std {

inline int SbStringFormat(char* buffer,
                          size_t size,
                          const char* format,
                          va_list arguments) {
  return ::SbStringFormat(buffer, size, format, arguments);
}

}  // namespace std

#undef __builtin_vsnprintf
#define __builtin_vsnprintf SbStringFormat
#undef vsnprintf
#define vsnprintf SbStringFormat

#endif  // STARBOARD

#endif  // STARBOARD_CLIENT_PORTING_POEM_STDIO_LEAKS_POEM_H_