chromium/third_party/protobuf/src/google/protobuf/stubs/port.h

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef GOOGLE_PROTOBUF_STUBS_PORT_H_
#define GOOGLE_PROTOBUF_STUBS_PORT_H_

#include <assert.h>
#include <cstdint>
#include <stdlib.h>
#include <cstddef>
#include <string>
#include <string.h>

#include <google/protobuf/stubs/platform_macros.h>

#include <google/protobuf/port_def.inc>

#undef PROTOBUF_LITTLE_ENDIAN
#ifdef _WIN32
  // Assuming windows is always little-endian.
  // TODO(xiaofeng): The PROTOBUF_LITTLE_ENDIAN is not only used for
  // optimization but also for correctness. We should define an
  // different macro to test the big-endian code path in coded_stream.
  #if !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST)
    #define PROTOBUF_LITTLE_ENDIAN …
  #endif
#if defined(_MSC_VER) && _MSC_VER >= 1300 && !defined(__INTEL_COMPILER)
// If MSVC has "/RTCc" set, it will complain about truncating casts at
// runtime.  This file contains some intentional truncating casts.
#pragma runtime_checks("c", off)
#endif
#else
#ifdef __APPLE__
#include <machine/endian.h>  // __BYTE_ORDER
#elif defined(__FreeBSD__)
#include <sys/endian.h>  // __BYTE_ORDER
#elif (defined(sun) || defined(__sun)) && (defined(__SVR4) || defined(__svr4__))
#include <sys/isa_defs.h>  // __BYTE_ORDER
#elif defined(_AIX) || defined(__TOS_AIX__)
#include <sys/machine.h>  // BYTE_ORDER
#else
#if !defined(__QNX__)
#include <endian.h>  // __BYTE_ORDER
#endif
#endif
#if ((defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)) ||   \
     (defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN) || \
     (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN)) &&      \
    !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST)
#define PROTOBUF_LITTLE_ENDIAN …
#endif
#endif

// These #includes are for the byte swap functions declared later on.
#ifdef _MSC_VER
#include <stdlib.h>  // NOLINT(build/include)
#include <intrin.h>
#elif defined(__APPLE__)
#include <libkern/OSByteOrder.h>
#elif defined(__linux__) || defined(__ANDROID__) || defined(__CYGWIN__)
#include <byteswap.h>  // IWYU pragma: export
#endif

// Legacy: some users reference these (internal-only) macros even though we
// don't need them any more.
#if defined(COMPONENT_BUILD) && defined(PROTOBUF_USE_DLLS)
  #if defined(_MSC_VER)
    #ifdef LIBPROTOBUF_EXPORTS
      #define LIBPROTOBUF_EXPORT …
    #else
      #define LIBPROTOBUF_EXPORT …
    #endif
    #ifdef LIBPROTOC_EXPORTS
      #define LIBPROTOC_EXPORT …
    #else
      #define LIBPROTOC_EXPORT …
    #endif
  #else  // defined(_MSC_VER)
    #ifdef LIBPROTOBUF_EXPORTS
      #define LIBPROTOBUF_EXPORT …
    #else
      #define LIBPROTOBUF_EXPORT
    #endif
    #ifdef LIBPROTOC_EXPORTS
      #define LIBPROTOC_EXPORT …
    #else
      #define LIBPROTOC_EXPORT
    #endif
  #endif
#else  // defined(COMPONENT_BUILD) && defined(PROTOBUF_USE_DLLS)
  #define LIBPROTOBUF_EXPORT
  #define LIBPROTOC_EXPORT
#endif

#define PROTOBUF_RUNTIME_DEPRECATED(message) …
#define GOOGLE_PROTOBUF_RUNTIME_DEPRECATED(message) …

// ===================================================================
// from google3/base/port.h

#if (defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L || \
     (defined(_MSC_VER) && _MSC_VER >= 1900))
// Define this to 1 if the code is compiled in C++11 mode; leave it
// undefined otherwise.  Do NOT define it to 0 -- that causes
// '#ifdef LANG_CXX11' to behave differently from '#if LANG_CXX11'.
#define LANG_CXX11 …
#else
#error "Protobuf requires at least C++11."
#endif

namespace google {
namespace protobuf {

ConstStringParam;

uint;

int8;
int16;
int32;
int64;

uint8;
uint16;
uint32;
uint64;

static const int32 kint32max = …;
static const int32 kint32min = …;
static const int64 kint64max = …;
static const int64 kint64min = …;
static const uint32 kuint32max = …;
static const uint64 kuint64max = …;

#if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) ||\
    defined(MEMORY_SANITIZER)

#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus
uint16_t __sanitizer_unaligned_load16(const void *p);
uint32_t __sanitizer_unaligned_load32(const void *p);
uint64_t __sanitizer_unaligned_load64(const void *p);
void __sanitizer_unaligned_store16(void *p, uint16_t v);
void __sanitizer_unaligned_store32(void *p, uint32_t v);
void __sanitizer_unaligned_store64(void *p, uint64_t v);
#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus

inline uint16_t GOOGLE_UNALIGNED_LOAD16(const void *p) {
  return __sanitizer_unaligned_load16(p);
}

inline uint32_t GOOGLE_UNALIGNED_LOAD32(const void *p) {
  return __sanitizer_unaligned_load32(p);
}

inline uint64_t GOOGLE_UNALIGNED_LOAD64(const void *p) {
  return __sanitizer_unaligned_load64(p);
}

inline void GOOGLE_UNALIGNED_STORE16(void *p, uint16_t v) {
  __sanitizer_unaligned_store16(p, v);
}

inline void GOOGLE_UNALIGNED_STORE32(void *p, uint32_t v) {
  __sanitizer_unaligned_store32(p, v);
}

inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64_t v) {
  __sanitizer_unaligned_store64(p, v);
}

#elif defined(GOOGLE_PROTOBUF_USE_UNALIGNED) && GOOGLE_PROTOBUF_USE_UNALIGNED

#define GOOGLE_UNALIGNED_LOAD16 …
#define GOOGLE_UNALIGNED_LOAD32 …
#define GOOGLE_UNALIGNED_LOAD64 …

#define GOOGLE_UNALIGNED_STORE16 …
#define GOOGLE_UNALIGNED_STORE32 …
#define GOOGLE_UNALIGNED_STORE64 …

#else
inline uint16_t GOOGLE_UNALIGNED_LOAD16(const void *p) { … }

inline uint32_t GOOGLE_UNALIGNED_LOAD32(const void *p) { … }

inline uint64_t GOOGLE_UNALIGNED_LOAD64(const void *p) { … }

inline void GOOGLE_UNALIGNED_STORE16(void *p, uint16_t v) { … }

inline void GOOGLE_UNALIGNED_STORE32(void *p, uint32_t v) { … }

inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64_t v) { … }
#endif

#if defined(GOOGLE_PROTOBUF_OS_NACL) \
    || (defined(__ANDROID__) && defined(__clang__) \
        && (__clang_major__ == 3 && __clang_minor__ == 8) \
        && (__clang_patchlevel__ < 275480))
#define GOOGLE_PROTOBUF_USE_PORTABLE_LOG2
#endif

// The following guarantees declaration of the byte swap functions.
#ifdef _MSC_VER
#define bswap_16 …
#define bswap_32 …
#define bswap_64 …

#elif defined(__APPLE__)
// Mac OS X / Darwin features
#define bswap_16 …
#define bswap_32 …
#define bswap_64 …

#elif !defined(__linux__) && !defined(__ANDROID__) && !defined(__CYGWIN__)

#ifndef bswap_16
static inline uint16_t bswap_16(uint16_t x) {
  return static_cast<uint16_t>(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8));
}
#define bswap_16 …
#endif

#ifndef bswap_32
static inline uint32_t bswap_32(uint32_t x) {
  return (((x & 0xFF) << 24) |
          ((x & 0xFF00) << 8) |
          ((x & 0xFF0000) >> 8) |
          ((x & 0xFF000000) >> 24));
}
#define bswap_32 …
#endif

#ifndef bswap_64
static inline uint64_t bswap_64(uint64_t x) {
  return (((x & uint64_t{0xFFu}) << 56) | ((x & uint64_t{0xFF00u}) << 40) |
          ((x & uint64_t{0xFF0000u}) << 24) |
          ((x & uint64_t{0xFF000000u}) << 8) |
          ((x & uint64_t{0xFF00000000u}) >> 8) |
          ((x & uint64_t{0xFF0000000000u}) >> 24) |
          ((x & uint64_t{0xFF000000000000u}) >> 40) |
          ((x & uint64_t{0xFF00000000000000u}) >> 56));
}
#define bswap_64 …
#endif

#endif

// ===================================================================
// from google3/util/bits/bits.h

class Bits { … };

// ===================================================================
// from google3/util/endian/endian.h
PROTOBUF_EXPORT uint32_t ghtonl(uint32_t x);

class BigEndian { … };

}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_STUBS_PORT_H_