iPXE
stdarg.h
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00001 #ifndef _STDARG_H
00002 #define _STDARG_H
00003 
00004 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00005 
00006 typedef __builtin_va_list va_list;
00007 #define va_start( ap, last ) __builtin_va_start ( ap, last )
00008 #define va_arg( ap, type ) __builtin_va_arg ( ap, type )
00009 #define va_end( ap ) __builtin_va_end ( ap )
00010 #define va_copy( dest, src ) __builtin_va_copy ( dest, src )
00011 
00012 /**
00013  * Count number of arguments to a variadic macro
00014  *
00015  * This rather neat, non-iterative solution is courtesy of Laurent
00016  * Deniau.
00017  *
00018  */
00019 #define _VA_ARG_COUNT(  _1,  _2,  _3,  _4,  _5,  _6,  _7,  _8,          \
00020                         _9, _10, _11, _12, _13, _14, _15, _16,          \
00021                        _17, _18, _19, _20, _21, _22, _23, _24,          \
00022                        _25, _26, _27, _28, _29, _30, _31, _32,          \
00023                        _33, _34, _35, _36, _37, _38, _39, _40,          \
00024                        _41, _42, _43, _44, _45, _46, _47, _48,          \
00025                        _49, _50, _51, _52, _53, _54, _55, _56,          \
00026                        _57, _58, _59, _60, _61, _62, _63,   N, ... ) N
00027 #define VA_ARG_COUNT( ... )                                             \
00028         _VA_ARG_COUNT ( __VA_ARGS__,                                    \
00029                         63, 62, 61, 60, 59, 58, 57, 56,                 \
00030                         55, 54, 53, 52, 51, 50, 49, 48,                 \
00031                         47, 46, 45, 44, 43, 42, 41, 40,                 \
00032                         39, 38, 37, 36, 35, 34, 33, 32,                 \
00033                         31, 30, 29, 28, 27, 26, 25, 24,                 \
00034                         23, 22, 21, 20, 19, 18, 17, 16,                 \
00035                         15, 14, 13, 12, 11, 10,  9,  8,                 \
00036                          7,  6,  5,  4,  3,  2,  1,  0 )
00037 
00038 #endif /* _STDARG_H */