Annotation of gcc/gvarargs.h, revision 1.1.1.5

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
1.1.1.5 ! root       40: #if defined (__H8300__) || defined (__H8300H__)
        !            41: #include <va-h8300.h>
        !            42: #else
1.1       root       43: 
                     44: #ifdef __NeXT__
                     45: 
                     46: /* On Next, erase any vestiges of stdarg.h.  */
                     47: 
1.1.1.3   root       48: #ifdef _ANSI_STDARG_H_
                     49: #define _VA_LIST_
                     50: #endif
                     51: #define _ANSI_STDARG_H_ 
                     52: 
1.1       root       53: #undef va_alist
                     54: #undef va_dcl
                     55: #undef va_list
                     56: #undef va_start
                     57: #undef va_end
                     58: #undef __va_rounded_size
                     59: #undef va_arg
                     60: #endif  /* __NeXT__ */
                     61: 
                     62: /* In GCC version 2, we want an ellipsis at the end of the declaration
                     63:    of the argument list.  GCC version 1 can't parse it.  */
                     64: 
                     65: #if __GNUC__ > 1
                     66: #define __va_ellipsis ...
                     67: #else
                     68: #define __va_ellipsis
                     69: #endif
                     70: 
                     71: /* These macros implement traditional (non-ANSI) varargs
                     72:    for GNU C.  */
                     73: 
                     74: #define va_alist  __builtin_va_alist
                     75: /* The ... causes current_function_varargs to be set in cc1.  */
                     76: #define va_dcl    int __builtin_va_alist; __va_ellipsis
                     77: 
1.1.1.3   root       78: /* Define __gnuc_va_list, just as in gstdarg.h.  */
1.1       root       79: 
1.1.1.3   root       80: #ifndef __GNUC_VA_LIST
                     81: #define __GNUC_VA_LIST
                     82: #if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX)
                     83: typedef char *__gnuc_va_list;
                     84: #else
                     85: typedef void *__gnuc_va_list;
1.1       root       86: #endif
                     87: #endif
                     88: 
                     89: #define va_start(AP)  AP=(char *) &__builtin_va_alist
                     90: 
                     91: #define va_end(AP)
                     92: 
                     93: #define __va_rounded_size(TYPE)  \
                     94:   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
                     95: 
1.1.1.5 ! root       96: #if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__)
1.1.1.3   root       97: /* This is for little-endian machines; small args are padded upward.  */
                     98: #define va_arg(AP, TYPE)                                               \
                     99:  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),    \
                    100:   *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
                    101: #else /* big-endian */
                    102: /* This is for big-endian machines; small args are padded downward.  */
1.1       root      103: #define va_arg(AP, TYPE)                                               \
1.1.1.3   root      104:  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),    \
                    105:   *((TYPE *) (void *) ((char *) (AP) - ((sizeof (TYPE) < 4             \
                    106:                                         ? sizeof (TYPE)                \
                    107:                                         : __va_rounded_size (TYPE))))))
                    108: #endif /* big-endian */
1.1       root      109: 
1.1.1.5 ! root      110: #endif /* not h8300 */
1.1.1.3   root      111: #endif /* not alpha */
1.1.1.2   root      112: #endif /* not i960 */
1.1.1.3   root      113: #endif /* not hppa */
1.1       root      114: #endif /* not m88k */
1.1.1.4   root      115: #endif /* not clipper */
1.1       root      116: #endif /* not pyr */
                    117: #endif /* not i860 */
                    118: #endif /* not mips */
                    119: #endif /* not spur */
                    120: #endif /* not sparc */
                    121: #endif /* not _VARARGS_H */
1.1.1.3   root      122: 
                    123: /* Define va_list from __gnuc_va_list.  */
                    124: 
                    125: #ifdef _HIDDEN_VA_LIST  /* On OSF1, this means varargs.h is "half-loaded".  */
                    126: #undef _VA_LIST
                    127: #endif
                    128: 
1.1.1.4   root      129: #ifdef __svr4__
1.1.1.3   root      130: /* SVR4.2 uses _VA_LIST for an internal alias for va_list,
1.1.1.4   root      131:    so we must avoid testing it and setting it here.
                    132:    SVR4 uses _VA_LIST as a flag in stdarg.h, but we should
                    133:    have no conflict with that.  */
1.1.1.3   root      134: #ifndef _VA_LIST_
                    135: #define _VA_LIST_
1.1.1.4   root      136: #ifdef __i860__
                    137: #ifndef _VA_LIST
                    138: #define _VA_LIST va_list
                    139: #endif
                    140: #endif /* __i860__ */
1.1.1.3   root      141: typedef __gnuc_va_list va_list;
                    142: #endif /* _VA_LIST_ */
                    143: 
1.1.1.4   root      144: #else /* not __svr4__ */
1.1.1.3   root      145: 
                    146: /* The macro _VA_LIST_ is the same thing used by this file in Ultrix.
                    147:    But on BSD NET2 we must not test or define or undef it.
                    148:    (Note that the comments in NET 2's ansi.h
                    149:    are incorrect for _VA_LIST_--see stdio.h!)  */
1.1.1.5 ! root      150: /* Michael Eriksson <[email protected]> at Thu Sep 30 11:00:57 1993:
        !           151:    Sequent defines _VA_LIST_ in <machine/machtypes.h> to be the type to
        !           152:    use for va_list (``typedef _VA_LIST_ va_list'') */
        !           153: #if !defined (_VA_LIST_) || defined (__BSD_NET2__) || defined (____386BSD____) || defined (__bsdi__) || defined (__sequent__)
1.1.1.3   root      154: /* The macro _VA_LIST is used in SCO Unix 3.2.  */
                    155: #ifndef _VA_LIST
1.1.1.4   root      156: /* The macro _VA_LIST_T_H is used in the Bull dpx2  */
                    157: #ifndef _VA_LIST_T_H
                    158: #define _VA_LIST_T_H
1.1.1.5 ! root      159: #if !(defined (__BSD_NET2__) || defined (____386BSD____) || defined (__bsdi__) || defined (__sequent__))
1.1.1.3   root      160: #define _VA_LIST_
                    161: #endif
                    162: #define _VA_LIST
                    163: typedef __gnuc_va_list va_list;
1.1.1.4   root      164: #endif /* not _VA_LIST_T_H */
1.1.1.3   root      165: #endif /* not _VA_LIST */
1.1.1.5 ! root      166: #endif /* not _VA_LIST_, except on certain systems */
1.1.1.3   root      167: 
1.1.1.4   root      168: #endif /* not __svr4__ */
1.1.1.3   root      169: 
                    170: /* The next BSD release (if there is one) wants this symbol to be
                    171:    undefined instead of _VA_LIST_.  */
                    172: #ifdef _BSD_VA_LIST
                    173: #undef _BSD_VA_LIST
                    174: #endif
                    175: 
1.1       root      176: #endif /* __GNUC__ */

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