Added support for three levels of nesting of the 'pragma pack'

include/poppack.h

-#ifdef __WINE_PSHPACK_H
-#undef __WINE_PSHPACK_H
-
-#if defined(__GNUC__) || defined(__SUNPRO_C)
-#pragma pack()
-#elif defined(__SUNPRO_CC)
-#warning "Assumes default alignment is 4"
-#pragma pack(4)
-#elif !defined(RC_INVOKED)
-#error "Restoration of the previous alignment isn't supported by the compiler"
-#endif /* defined(__GNUC__) || defined(__SUNPRO_C) ; !defined(RC_INVOKED) */
-
-#else /* defined(__WINE_PSHPACK_H) */
+#if defined(__WINE_PSHPACK_H3)
+#  ifndef __WINE_INTERNAL_POPPACK
+#    undef __WINE_PSHPACK_H3
+#  endif
+/* Depth == 3 */
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    if __WINE_PSHPACK_H2 == 1
+#      pragma pack(1)
+#    elif __WINE_PSHPACK_H2 == 2
+#      pragma pack(2)
+#    elif __WINE_PSHPACK_H2 == 8
+#      pragma pack(8)
+#    else
+#      pragma pack(4)
+#    endif
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#elif defined(__WINE_PSHPACK_H2)
+#  ifndef __WINE_INTERNAL_POPPACK
+#    undef __WINE_PSHPACK_H2
+#  endif
+/* Depth == 2 */
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    if __WINE_PSHPACK_H == 1
+#      pragma pack(1)
+#    elif __WINE_PSHPACK_H == 2
+#      pragma pack(2)
+#    elif __WINE_PSHPACK_H == 8
+#      pragma pack(8)
+#    else
+#      pragma pack(4)
+#    endif
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#elif defined(__WINE_PSHPACK_H)
+#  ifndef __WINE_INTERNAL_POPPACK
+#    undef __WINE_PSHPACK_H
+#  endif
+/* Depth == 1 */
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C)
+#    pragma pack()
+#  elif defined(__SUNPRO_CC)
+#    warning "Assuming a default alignment of 4"
+#    pragma pack(4)
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#else
+/* Depth == 0 ! */
+
 #error "Popping alignment isn't possible since no alignment has been pushed"
-#endif /* defined(__WINE_PSHPACK_H) */
+
+#endif
+
+#undef __WINE_INTERNAL_POPPACK

include/pshpack1.h

-#ifndef __WINE_PSHPACK_H
-#define __WINE_PSHPACK_H 1
+#if defined(__WINE_PSHPACK_H3)
 
-#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
-#pragma pack(1)
-#elif !defined(RC_INVOKED)
-#error "1 as alignment isn't supported by the compiler"
-#endif /* defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) ; !defined(RC_INVOKED) */
+   /* Depth > 3 */
+#  error "Alignment nesting > 3 is not supported"
 
-#else /* !defined(__WINE_PSHPACK_H) */
-#error "Nested pushing of alignment isn't supported by the compiler"
-#endif /* !defined(__WINE_PSHPACK_H) */
+#else
 
+#  if !defined(__WINE_PSHPACK_H)
+#    define __WINE_PSHPACK_H  1
+     /* Depth == 1 */
+#  elif !defined(__WINE_PSHPACK_H2)
+#    define __WINE_PSHPACK_H2 1
+     /* Depth == 2 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  elif !defined(__WINE_PSHPACK_H3)
+#    define __WINE_PSHPACK_H3 1
+     /* Depth == 3 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  endif
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    pragma pack(1)
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#endif

include/pshpack2.h

-#ifndef __WINE_PSHPACK_H
-#define __WINE_PSHPACK_H 2
-
-#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
-#pragma pack(2)
-#elif !defined(RC_INVOKED)
-#error "2 as alignment isn't supported by the compiler"
-#endif /* defined(__GNUC__) || defined(__SUNPRO_CC) ; !defined(RC_INVOKED) */
-
-#else /* !defined(__WINE_PSHPACK_H) */
-#error "Nested pushing of alignment isn't supported by the compiler"
-#endif /* !defined(__WINE_PSHPACK_H) */
+#if defined(__WINE_PSHPACK_H3)
+
+   /* Depth > 3 */
+#  error "Alignment nesting > 3 is not supported"
+
+#else
+
+#  if !defined(__WINE_PSHPACK_H)
+#    define __WINE_PSHPACK_H  2
+     /* Depth == 1 */
+#  elif !defined(__WINE_PSHPACK_H2)
+#    define __WINE_PSHPACK_H2 2
+     /* Depth == 2 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  elif !defined(__WINE_PSHPACK_H3)
+#    define __WINE_PSHPACK_H3 2
+     /* Depth == 3 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  endif
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    pragma pack(2)
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#endif

include/pshpack4.h

-#ifndef __WINE_PSHPACK_H
-#define __WINE_PSHPACK_H 4
+#if defined(__WINE_PSHPACK_H3)
 
-#if defined(__GNUC__) || defined(__SUNPRO_CC)
-#pragma pack(4)
-#elif defined(__SUNPRO_C)
-#pragma pack()
-#elif !defined(RC_INVOKED)
-#error "4 as alignment isn't supported by the compiler"
-#endif /* defined(__GNUC__) || defined(__SUNPRO_CC) ; !defined(RC_INVOKED) */
+   /* Depth > 3 */
+#  error "Alignment nesting > 3 is not supported"
 
-#else /* !defined(__WINE_PSHPACK_H) */
-#error "Nested pushing of alignment isn't supported by the compiler"
-#endif /* !defined(__WINE_PSHPACK_H) */
+#else
 
+#  if !defined(__WINE_PSHPACK_H)
+#    define __WINE_PSHPACK_H  4
+     /* Depth == 1 */
+#  elif !defined(__WINE_PSHPACK_H2)
+#    define __WINE_PSHPACK_H2 4
+     /* Depth == 2 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  elif !defined(__WINE_PSHPACK_H3)
+#    define __WINE_PSHPACK_H3 4
+     /* Depth == 3 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  endif
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    pragma pack(4)
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#endif

include/pshpack8.h

-#ifndef __WINE_PSHPACK_H
-#define __WINE_PSHPACK_H 8
-
-#if 0
-#pragma pack(8)
-#elif !defined(RC_INVOKED)
-#error "8 as alignment is not supported"
-#endif /* 0 ; !defined(RC_INVOKED) */
-
-#else /* !defined(__WINE_PSHPACK_H) */
-#error "Nested pushing of alignment isn't supported by the compiler"
-#endif /* !defined(__WINE_PSHPACK_H) */
+#if defined(__WINE_PSHPACK_H3)
+
+   /* Depth > 3 */
+#  error "Alignment nesting > 3 is not supported"
+
+#else
+
+#  if !defined(__WINE_PSHPACK_H)
+#    define __WINE_PSHPACK_H  8
+     /* Depth == 1 */
+#  elif !defined(__WINE_PSHPACK_H2)
+#    define __WINE_PSHPACK_H2 8
+     /* Depth == 2 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  elif !defined(__WINE_PSHPACK_H3)
+#    define __WINE_PSHPACK_H3 8
+     /* Depth == 3 */
+#    define __WINE_INTERNAL_POPPACK
+#    include "poppack.h"
+#  endif
+
+#  if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#    pragma pack(8)
+#    warning "8 as alignment is not supported"
+#  elif !defined(RC_INVOKED)
+#    error "Adjusting the alignment is not supported with this compiler"
+#  endif
+
+#endif