Annotation of gcc/gvarargs.h, revision 1.1.1.4

1.1       root        1: #ifndef __GNUC__
                      2: /* Use the system's macros with the system's compiler.  */
                      3: #include <varargs.h>
                      4: #else
1.1.1.3   root        5: /* Record that this is varargs.h; this turns off stdarg.h.  */
1.1       root        6: 
                      7: #ifndef _VARARGS_H
                      8: #define _VARARGS_H
                      9: 
                     10: #ifdef __sparc__
1.1.1.3   root       11: #include <va-sparc.h>
1.1       root       12: #else
                     13: #ifdef __spur__
1.1.1.3   root       14: #include <va-spur.h>
1.1       root       15: #else
                     16: #ifdef __mips__
1.1.1.3   root       17: #include <va-mips.h>
1.1       root       18: #else
                     19: #ifdef __i860__
1.1.1.3   root       20: #include <va-i860.h>
1.1       root       21: #else
                     22: #ifdef __pyr__
1.1.1.3   root       23: #include <va-pyr.h>
1.1       root       24: #else
1.1.1.4 ! root       25: #ifdef __clipper__
        !            26: #include <va-clipper.h>
        !            27: #else
1.1       root       28: #ifdef __m88k__
1.1.1.3   root       29: #include <va-m88k.h>
1.1       root       30: #else
1.1.1.3   root       31: #if defined(__hppa__) || defined(hp800)
                     32: #include <va-pa.h>
1.1       root       33: #else
1.1.1.2   root       34: #ifdef __i960__
1.1.1.3   root       35: #include <va-i960.h>
                     36: #else
                     37: #ifdef __alpha__
                     38: #include <va-alpha.h>
1.1.1.2   root       39: #else
1.1       root       40: 
                     41: #ifdef __NeXT__
                     42: 
                     43: /* On Next, erase any vestiges of stdarg.h.  */
                     44: 
1.1.1.3   root       45: #ifdef _ANSI_STDARG_H_
                     46: #define _VA_LIST_
                     47: #endif
                     48: #define _ANSI_STDARG_H_ 
                     49: 
1.1       root       50: #undef va_alist
                     51: #undef va_dcl
                     52: #undef va_list
                     53: #undef va_start
                     54: #undef va_end
                     55: #undef __va_rounded_size
                     56: #undef va_arg
                     57: #endif  /* __NeXT__ */
                     58: 
                     59: /* In GCC version 2, we want an ellipsis at the end of the declaration
                     60:    of the argument list.  GCC version 1 can't parse it.  */
                     61: 
                     62: #if __GNUC__ > 1
                     63: #define __va_ellipsis ...
                     64: #else
                     65: #define __va_ellipsis
                     66: #endif
                     67: 
                     68: /* These macros implement traditional (non-ANSI) varargs
                     69:    for GNU C.  */
                     70: 
                     71: #define va_alist  __builtin_va_alist
                     72: /* The ... causes current_function_varargs to be set in cc1.  */
                     73: #define va_dcl    int __builtin_va_alist; __va_ellipsis
                     74: 
1.1.1.3   root       75: /* Define __gnuc_va_list, just as in gstdarg.h.  */
1.1       root       76: 
1.1.1.3   root       77: #ifndef __GNUC_VA_LIST
                     78: #define __GNUC_VA_LIST
                     79: #if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX)
                     80: typedef char *__gnuc_va_list;
                     81: #else
                     82: typedef void *__gnuc_va_list;
1.1       root       83: #endif
                     84: #endif
                     85: 
                     86: #define va_start(AP)  AP=(char *) &__builtin_va_alist
                     87: 
                     88: #define va_end(AP)
                     89: 
                     90: #define __va_rounded_size(TYPE)  \
                     91:   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
                     92: 
1.1.1.3   root       93: #if defined (__arm__) || defined (__i386__) || defined (__ns32000__) || defined (__vax__)
                     94: /* This is for little-endian machines; small args are padded upward.  */
                     95: #define va_arg(AP, TYPE)                                               \
                     96:  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),    \
                     97:   *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
                     98: #else /* big-endian */
                     99: /* This is for big-endian machines; small args are padded downward.  */
1.1       root      100: #define va_arg(AP, TYPE)                                               \
1.1.1.3   root      101:  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),    \
                    102:   *((TYPE *) (void *) ((char *) (AP) - ((sizeof (TYPE) < 4             \
                    103:                                         ? sizeof (TYPE)                \
                    104:                                         : __va_rounded_size (TYPE))))))
                    105: #endif /* big-endian */
1.1       root      106: 
1.1.1.3   root      107: #endif /* not alpha */
1.1.1.2   root      108: #endif /* not i960 */
1.1.1.3   root      109: #endif /* not hppa */
1.1       root      110: #endif /* not m88k */
1.1.1.4 ! root      111: #endif /* not clipper */
1.1       root      112: #endif /* not pyr */
                    113: #endif /* not i860 */
                    114: #endif /* not mips */
                    115: #endif /* not spur */
                    116: #endif /* not sparc */
                    117: #endif /* not _VARARGS_H */
1.1.1.3   root      118: 
                    119: /* Define va_list from __gnuc_va_list.  */
                    120: 
                    121: #ifdef _HIDDEN_VA_LIST  /* On OSF1, this means varargs.h is "half-loaded".  */
                    122: #undef _VA_LIST
                    123: #endif
                    124: 
1.1.1.4 ! root      125: #ifdef __svr4__
1.1.1.3   root      126: /* SVR4.2 uses _VA_LIST for an internal alias for va_list,
1.1.1.4 ! root      127:    so we must avoid testing it and setting it here.
        !           128:    SVR4 uses _VA_LIST as a flag in stdarg.h, but we should
        !           129:    have no conflict with that.  */
1.1.1.3   root      130: #ifndef _VA_LIST_
                    131: #define _VA_LIST_
1.1.1.4 ! root      132: #ifdef __i860__
        !           133: #ifndef _VA_LIST
        !           134: #define _VA_LIST va_list
        !           135: #endif
        !           136: #endif /* __i860__ */
1.1.1.3   root      137: typedef __gnuc_va_list va_list;
                    138: #endif /* _VA_LIST_ */
                    139: 
1.1.1.4 ! root      140: #else /* not __svr4__ */
1.1.1.3   root      141: 
                    142: /* The macro _VA_LIST_ is the same thing used by this file in Ultrix.
                    143:    But on BSD NET2 we must not test or define or undef it.
                    144:    (Note that the comments in NET 2's ansi.h
                    145:    are incorrect for _VA_LIST_--see stdio.h!)  */
                    146: #if !defined (_VA_LIST_) || defined (__BSD_NET2__) || defined (____386BSD____)
                    147: /* The macro _VA_LIST is used in SCO Unix 3.2.  */
                    148: #ifndef _VA_LIST
1.1.1.4 ! root      149: /* The macro _VA_LIST_T_H is used in the Bull dpx2  */
        !           150: #ifndef _VA_LIST_T_H
        !           151: #define _VA_LIST_T_H
1.1.1.3   root      152: #if !(defined (__BSD_NET2__) || defined (____386BSD____))
                    153: #define _VA_LIST_
                    154: #endif
                    155: #define _VA_LIST
                    156: typedef __gnuc_va_list va_list;
1.1.1.4 ! root      157: #endif /* not _VA_LIST_T_H */
1.1.1.3   root      158: #endif /* not _VA_LIST */
                    159: #endif /* not _VA_LIST_ */
                    160: 
1.1.1.4 ! root      161: #endif /* not __svr4__ */
1.1.1.3   root      162: 
                    163: /* The next BSD release (if there is one) wants this symbol to be
                    164:    undefined instead of _VA_LIST_.  */
                    165: #ifdef _BSD_VA_LIST
                    166: #undef _BSD_VA_LIST
                    167: #endif
                    168: 
1.1       root      169: #endif /* __GNUC__ */

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