2 Note that the type used in va_arg is supposed to match the
3 actual type **after default promotions**.
4 Thus, va_arg (..., short) is not valid. */
7 #ifndef _ANSI_STDARG_H_
8 #ifndef __need___va_list
10 #define _ANSI_STDARG_H_
11 #endif /* not __need___va_list */
12 #undef __need___va_list
15 /* Use the system's macros with the system's compiler.
16 This is relevant only when building GCC with some other compiler. */
41 /* Define __gnuc_va_list. */
43 #ifndef __GNUC_VA_LIST
44 #define __GNUC_VA_LIST
45 #if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX)
46 typedef char *__gnuc_va_list;
48 typedef void *__gnuc_va_list;
52 /* Define the standard macros for the user,
53 if this invocation was from the user program. */
56 /* Amount of space required in an argument list for an arg of type TYPE.
57 TYPE may alternatively be an expression whose type is used. */
59 #define __va_rounded_size(TYPE) \
60 (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
62 #define va_start(AP, LASTARG) \
63 (AP = ((__gnuc_va_list) __builtin_next_arg ()))
66 void va_end (__gnuc_va_list); /* Defined in libgcc.a */
69 /* We cast to void * and then to TYPE * because this avoids
70 a warning about increasing the alignment requirement. */
72 #if defined (__arm__) || defined (__i386__) || defined (__ns32000__) || defined (__vax__)
73 /* This is for little-endian machines; small args are padded upward. */
74 #define va_arg(AP, TYPE) \
75 (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)), \
76 *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
77 #else /* big-endian */
78 /* This is for big-endian machines; small args are padded downward. */
79 #define va_arg(AP, TYPE) \
80 (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)), \
81 *((TYPE *) (void *) ((char *) (AP) - ((sizeof (TYPE) < 4 \
83 : __va_rounded_size (TYPE))))))
84 #endif /* big-endian */
85 #endif /* _STDARG_H */
87 #endif /* not alpha */
89 #endif /* not sparc */
96 /* Define va_list, if desired, from __gnuc_va_list. */
97 /* We deliberately do not define va_list when called from
98 stdio.h, because ANSI C says that stdio.h is not supposed to define
99 va_list. stdio.h needs to have access to that data type,
100 but must not use that name. It should use the name __gnuc_va_list,
101 which is safe because it is reserved for the implementation. */
103 #ifdef _HIDDEN_VA_LIST /* On OSF1, this means varargs.h is "half-loaded". */
112 /* SVR4.2 uses _VA_LIST for an internal alias for va_list,
113 so we must avoid testing it and setting it here. */
116 typedef __gnuc_va_list va_list;
117 #endif /* _VA_LIST_ */
118 #else /* not __SVR4_2__ */
120 /* The macro _VA_LIST_ is the same thing used by this file in Ultrix.
121 But on BSD NET2 we must not test or define or undef it.
122 (Note that the comments in NET 2's ansi.h
123 are incorrect for _VA_LIST_--see stdio.h!) */
124 #if !defined (_VA_LIST_) || defined (__BSD_NET2__) || defined (____386BSD____)
125 /* The macro _VA_LIST is used in SCO Unix 3.2. */
127 #if !(defined (__BSD_NET2__) || defined (____386BSD____))
131 typedef __gnuc_va_list va_list;
132 #endif /* not _VA_LIST */
133 #endif /* not _VA_LIST_ */
135 #endif /* not __SVR4_2__ */
137 #endif /* _STDARG_H */
139 #endif /* __GNUC__ */
140 #endif /* not _ANSI_STDARG_H_ */
141 #endif /* not _STDARG_H */