include/begin_code.h

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997-2004 Sam Lantinga
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19     Sam Lantinga
  20     slouken@libsdl.org
  21 */
  22
  23 /* This file sets things up for C dynamic library function definitions,
  24    static inlined functions, and structures aligned at 4-byte alignment.
  25    If you don't like ugly C preprocessor code, don't look at this file. :)
  26 */
  27
  28 /* This shouldn't be nested -- included it around code only. */
  29 #ifdef _begin_code_h
  30 #error Nested inclusion of begin_code.h
  31 #endif
  32 #define _begin_code_h
  33
  34 /* Some compilers use a special export keyword */
  35 #ifndef DECLSPEC
  36 # if defined(__BEOS__)
  37 #  if defined(__GNUC__)
  38 #   define DECLSPEC     __declspec(dllexport)
  39 #  else
  40 #   define DECLSPEC     __declspec(export)
  41 #  endif
  42 # elif defined(__WIN32__)
  43 #  ifdef __BORLANDC__
  44 #   ifdef BUILD_SDL
  45 #    define DECLSPEC
  46 #   else
  47 #    define DECLSPEC    __declspec(dllimport)
  48 #   endif
  49 #  else
  50 #   define DECLSPEC     __declspec(dllexport)
  51 #  endif
  52 # elif defined(__OS2__)
  53 #  ifdef __WATCOMC__
  54 #   ifdef BUILD_SDL
  55 #    define DECLSPEC    __declspec(dllexport)
  56 #   else
  57 #    define DECLSPEC
  58 #   endif
  59 #  else
  60 #   define DECLSPEC
  61 #  endif
  62 # else
  63 #  if defined(__GNUC__) && __GNUC__ >= 4
  64 #   define DECLSPEC     __attribute__ ((visibility("default")))
  65 #  else
  66 #   define DECLSPEC
  67 #  endif
  68 # endif
  69 #endif
  70
  71 /* By default SDL uses the C calling convention */
  72 #ifndef SDLCALL
  73 #if defined(__WIN32__) && !defined(__GNUC__)
  74 #define SDLCALL __cdecl
  75 #else
  76 #ifdef __OS2__
  77 /* But on OS/2, we use the _System calling convention */
  78 /* to be compatible with every compiler */
  79 #define SDLCALL _System
  80 #else
  81 #define SDLCALL
  82 #endif
  83 #endif
  84 #endif /* SDLCALL */
  85
  86 #ifdef __SYMBIAN32__
  87 #ifndef EKA2
  88 #undef DECLSPEC
  89 #define DECLSPEC
  90 #elif !defined(__WINS__)
  91 #undef DECLSPEC
  92 #define DECLSPEC __declspec(dllexport)
  93 #endif /* !EKA2 */
  94 #endif /* __SYMBIAN32__ */
  95
  96 /* Force structure packing at 4 byte alignment.
  97    This is necessary if the header is included in code which has structure
  98    packing set to an alternate value, say for loading structures from disk.
  99    The packing is reset to the previous value in close_code.h
 100  */
 101 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
 102 #ifdef _MSC_VER
 103 #pragma warning(disable: 4103)
 104 #endif
 105 #ifdef __BORLANDC__
 106 #pragma nopackwarning
 107 #endif
 108 #pragma pack(push,4)
 109 #elif (defined(__MWERKS__) && defined(__MACOS__))
 110 #pragma options align=mac68k4byte
 111 #pragma enumsalwaysint on
 112 #endif /* Compiler needs structure packing set */
 113
 114 /* Set up compiler-specific options for inlining functions */
 115 #ifndef SDL_INLINE_OKAY
 116 #ifdef __GNUC__
 117 #define SDL_INLINE_OKAY
 118 #else
 119 /* Add any special compiler-specific cases here */
 120 #if defined(_MSC_VER) || defined(__BORLANDC__) || \
 121     defined(__DMC__) || defined(__SC__) || \
 122     defined(__WATCOMC__) || defined(__LCC__) || \
 123     defined(__DECC) || defined(__EABI__)
 124 #ifndef __inline__
 125 #define __inline__      __inline
 126 #endif
 127 #define SDL_INLINE_OKAY
 128 #else
 129 #if !defined(__MRC__) && !defined(_SGI_SOURCE)
 130 #ifndef __inline__
 131 #define __inline__ inline
 132 #endif
 133 #define SDL_INLINE_OKAY
 134 #endif /* Not a funky compiler */
 135 #endif /* Visual C++ */
 136 #endif /* GNU C */
 137 #endif /* SDL_INLINE_OKAY */
 138
 139 /* If inlining isn't supported, remove "__inline__", turning static
 140    inlined functions into static functions (resulting in code bloat
 141    in all files which include the offending header files)
 142 */
 143 #ifndef SDL_INLINE_OKAY
 144 #define __inline__
 145 #endif
 146
 147 /* Apparently this is needed by several Windows compilers */
 148 #if !defined(__MACH__)
 149 #ifndef NULL
 150 #ifdef __cplusplus
 151 #define NULL 0
 152 #else
 153 #define NULL ((void *)0)
 154 #endif
 155 #endif /* NULL */
 156 #endif /* ! Mac OS X - breaks precompiled headers */