C++ Visual C+中的结构定义错误+；

我在使用gcc进行结构定义时遇到了一个问题 现在我想在VisualStudio中编译同一个程序，但有些约定不匹配。我对代码做了一些修改，但我不知道哪里出了问题

下面的代码来自brg_types.h

 #ifndef _BRG_TYPES_H
#define _BRG_TYPES_H

#if defined(__cplusplus)
extern "C" {
#endif

#include <limits.h>

#if defined( _MSC_VER ) && ( _MSC_VER >= 1300 )
#  include <stddef.h>
#  define ptrint_t intptr_t
#elif defined( __GNUC__ ) && ( __GNUC__ >= 3 )
#  include <stdint.h>
#  define ptrint_t intptr_t
#else
#  define ptrint_t int
#endif

#ifndef BRG_UI8
#  define BRG_UI8
#  if UCHAR_MAX == 255u
     typedef unsigned char uint_8t;
#  else
#    error Please define uint_8t as an 8-bit unsigned integer type in brg_types.h
#  endif
#endif

#ifndef BRG_UI16
#  define BRG_UI16
#  if USHRT_MAX == 65535u
     typedef unsigned short uint_16t;
#  else
#    error Please define uint_16t as a 16-bit unsigned short type in brg_types.h
#  endif
#endif

#ifndef BRG_UI32
#  define BRG_UI32
#  if UINT_MAX == 4294967295u
#    define li_32(h) 0x##h##u
     typedef unsigned int uint_32t;
#  elif ULONG_MAX == 4294967295u
#    define li_32(h) 0x##h##ul
     typedef unsigned long uint_32t;
#  elif defined( _CRAY )
#    error This code needs 32-bit data types, which Cray machines do not provide
#  else
#    error Please define uint_32t as a 32-bit unsigned integer type in brg_types.h
#  endif
#endif

#ifndef BRG_UI64
#  if defined( __BORLANDC__ ) && !defined( __MSDOS__ )
#    define BRG_UI64
#    define li_64(h) 0x##h##ui64
     typedef unsigned __int64 uint_64t;
#  elif defined( _MSC_VER ) && ( _MSC_VER < 1300 )    /* 1300 == VC++ 7.0 */
#    define BRG_UI64
#    define li_64(h) 0x##h##ui64
     typedef unsigned __int64 uint_64t;
#  elif defined( __sun ) && defined( ULONG_MAX ) && ULONG_MAX == 0xfffffffful
#    define BRG_UI64
#    define li_64(h) 0x##h##ull
     typedef unsigned long long uint_64t;
#  elif defined( __MVS__ )
#    define BRG_UI64
#    define li_64(h) 0x##h##ull
     typedef unsigned int long long uint_64t;
#  elif defined( UINT_MAX ) && UINT_MAX > 4294967295u
#    if UINT_MAX == 18446744073709551615u
#      define BRG_UI64
#      define li_64(h) 0x##h##u
       typedef unsigned int uint_64t;
#    endif
#  elif defined( ULONG_MAX ) && ULONG_MAX > 4294967295u
#    if ULONG_MAX == 18446744073709551615ul
#      define BRG_UI64
#      define li_64(h) 0x##h##ul
       typedef unsigned long uint_64t;
#    endif
#  elif defined( ULLONG_MAX ) && ULLONG_MAX > 4294967295u
#    if ULLONG_MAX == 18446744073709551615ull
#      define BRG_UI64
#      define li_64(h) 0x##h##ull
       typedef unsigned long long uint_64t;
#    endif
#  elif defined( ULONG_LONG_MAX ) && ULONG_LONG_MAX > 4294967295u
#    if ULONG_LONG_MAX == 18446744073709551615ull
#      define BRG_UI64
#      define li_64(h) 0x##h##ull
       typedef unsigned long long uint_64t;
#    endif
#  endif
#endif

#if !defined( BRG_UI64 )
#  if defined( NEED_UINT_64T )
#    error Please define uint_64t as an unsigned 64 bit type in brg_types.h
#  endif
#endif

#ifndef RETURN_VALUES
#  define RETURN_VALUES
#  if defined( DLL_EXPORT )
#    if defined( _MSC_VER ) || defined ( __INTEL_COMPILER )
#      define VOID_RETURN    __declspec( dllexport ) void __stdcall
#      define INT_RETURN     __declspec( dllexport ) int  __stdcall
#    elif defined( __GNUC__ )
#      define VOID_RETURN    __declspec( __dllexport__ ) void
#      define INT_RETURN     __declspec( __dllexport__ ) int
#    else
#      error Use of the DLL is only available on the Microsoft, Intel and GCC compilers
#    endif
#  elif defined( DLL_IMPORT )
#    if defined( _MSC_VER ) || defined ( __INTEL_COMPILER )
#      define VOID_RETURN    __declspec( dllimport ) void __stdcall
#      define INT_RETURN     __declspec( dllimport ) int  __stdcall
#    elif defined( __GNUC__ )
#      define VOID_RETURN    __declspec( __dllimport__ ) void
#      define INT_RETURN     __declspec( __dllimport__ ) int
#    else
#      error Use of the DLL is only available on the Microsoft, Intel and GCC compilers
#    endif
#  elif defined( __WATCOMC__ )
#    define VOID_RETURN  void __cdecl
#    define INT_RETURN   int  __cdecl
#  else
#    define VOID_RETURN  void
#    define INT_RETURN   int
#  endif
#endif


#define ALIGN_OFFSET(x,n)   (((ptrint_t)(x)) & ((n) - 1))
#define ALIGN_FLOOR(x,n)    ((uint_8t*)(x) - ( ((ptrint_t)(x)) & ((n) - 1)))
#define ALIGN_CEIL(x,n)     ((uint_8t*)(x) + (-((ptrint_t)(x)) & ((n) - 1)))


#define UI_TYPE(size)               uint_##size##t
#define UNIT_TYPEDEF(x,size)        typedef UI_TYPE(size) x
#define BUFR_TYPEDEF(x,size,bsize)  typedef UI_TYPE(size) x[bsize / (size >> 3)]
#define UNIT_CAST(x,size)           ((UI_TYPE(size) )(x))  
#define UPTR_CAST(x,size)           ((UI_TYPE(size)*)(x))


#define u8 uint_8t
#define u32 uint_32t
#define u64 uint_64t


#if defined(__cplusplus)
}
#endif

#endif

上面的代码是用gcc编译器编译的

在VisualStudio中，brg_类型的使用是按原样完成的

和表。h如下所示进行了更改

#pragma once
#ifndef __tables_h
#define __tables_h
#include "brg_endian.h"
#include "brg_types.h"

#if defined(_MSC_VER)
#define ALIGNED_(x) __declspec(align(x))

#else
#if defined(__GNUC__)
#define ALIGNED_(x) __attribute__ ((aligned(x)))
#endif
#endif
#define ALIGNED_TYPE_(t,x) typedef t ALIGNED_(x)

#pragma pack(1)

        #define int8_t __int8              
        #define int16_t __int16             
        #define int32_t __int32             
        #define int64_t __int64             
        #define uint8_t unsigned __int8     
        #define uint16_t unsigned __int16    
        #define uint32_t unsigned __int32    
        #define uint64_t unsigned __int64    

#if (PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN)
  const uint32_t T[8*256] ALIGNED_(64) = {
/*some code*/
};
#endif /* IS_BIG_ENDIAN */

#if (PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN)
  const uint32_t T[8*256] ALIGNED_(64) = {
};
#endif /* IS_LITTLE_ENDIAN */

#endif /* __tables_h */

visual studio向我抛出的错误为

Error   3   error C1903: unable to recover from previous error(s); stopping compilation 
Error   1   error C2144: syntax error : 'int' should be preceded by ';' 
Error   2   error C2513: 'int' : no variable declared before '='    

near: const uint32_t T[8*256] ALIGNED_(64) = {
    /*some code*/
    };

---

您的问题是

对齐的

宏。按照目前的定义，它需要在VS中声明之前，但在GCC中声明之后。您希望实现的语法是：

    const uint32_t __declspec(align(64)) T[8*256] = // MSVC
    const uint32_t T[8*256] __attribute__ ((aligned(64))) = // GCC

我认为解决方案是将变量声明传递给

ALIGNED\uuu

，这样用法如下所示：

    const uint32_t ALIGNED_(T[8*256], 64) = ...

定义应该类似于：

#if defined(_MSC_VER)
#    define ALIGNED_(v, x) __declspec(align(x)) v
#elif defined(__GNUC__)
#    define ALIGNED_(v, x) v __attribute__ ((aligned(x)))
#else
#    error "Don't know how to define ALIGNED_"
#endif

警告：此代码未被任何编译器看到。假设它包含错误

---

我不知道如何处理对齐类型的定义，因为我看不到它的使用示例。

请从“输出”选项卡而不是“错误”选项卡复制错误，以便获得行号。我已经提到过代码行，在代码行中，我用“near:”获得错误，任何其他选项都可以尝试删除

={}

。但宏观扩张可能存在错误。只是对文件进行预处理，看看宏是如何展开的。为什么__declspec（align（64））就其本身而言是好的，是的，它很好-但是它需要在声明器之前出现。你能帮助我详细定义部分吗？到目前为止还没有成功

#if defined(_MSC_VER)
#    define ALIGNED_(v, x) __declspec(align(x)) v
#elif defined(__GNUC__)
#    define ALIGNED_(v, x) v __attribute__ ((aligned(x)))
#else
#    error "Don't know how to define ALIGNED_"
#endif