Add diclaimer of copyright to _osname() manual page.
[unix-history] / gnu / usr.bin / cc / common / gstddef.h
CommitLineData
9bf86ebb
PR
1#ifndef _STDDEF_H
2#ifndef _STDDEF_H_
3#ifndef _ANSI_STDDEF_H
4
5/* Any one of these symbols __need_* means that GNU libc
6 wants us just to define one data type. So don't define
7 the symbols that indicate this file's entire job has been done. */
8#if (!defined(__need_wchar_t) && !defined(__need_size_t) \
9 && !defined(__need_ptrdiff_t) && !defined(__need_NULL))
10#define _STDDEF_H
11#define _STDDEF_H_
12/* snaroff@next.com says the NeXT needs this. */
13#define _ANSI_STDDEF_H
14#endif
15
16#ifndef __sys_stdtypes_h
17/* This avoids lossage on SunOS but only if stdtypes.h comes first.
18 There's no way to win with the other order! Sun lossage. */
19
20/* On 4.3bsd-net2, make sure ansi.h is included, so we have
21 one less case to deal with in the following. */
22#if defined (__BSD_NET2__) || defined (____386BSD____)
23#include <machine/ansi.h>
24#endif
25
26/* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
27 defined if the corresponding type is *not* defined. */
28#ifdef _ANSI_H_
29#ifndef _SIZE_T_
30#define _SIZE_T
31#endif
32#ifndef _PTRDIFF_T_
33#define _PTRDIFF_T
34#endif
35#ifndef _WCHAR_T_
36#define _WCHAR_T
37#endif
38/* Undef _FOO_T_ if we are supposed to define foo_t. */
39#if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
40#undef _PTRDIFF_T_
41#endif
42#if defined (__need_size_t) || defined (_STDDEF_H_)
43#undef _SIZE_T_
44#endif
45#if defined (__need_wchar_t) || defined (_STDDEF_H_)
46#undef _WCHAR_T_
47#endif
48#endif /* _ANSI_H_ */
49
50/* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
51 Just ignore it. */
52#if defined (__sequent__) && defined (_PTRDIFF_T_)
53#undef _PTRDIFF_T_
54#endif
55
56/* In case nobody has defined these types, but we aren't running under
57 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE__TYPE__, and
58 __WCHAR_TYPE__ have reasonable values. This can happen if the
59 parts of GCC is compiled by an older compiler, that actually
60 include gstddef.h, such as collect2. */
61
62/* Signed type of difference of two pointers. */
63
64/* Define this type if we are doing the whole job,
65 or if we want this type in particular. */
66#if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
67#ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */
68#ifndef _T_PTRDIFF_
69#ifndef _T_PTRDIFF
70#ifndef __PTRDIFF_T
71#ifndef _PTRDIFF_T_
72#ifndef ___int_ptrdiff_t_h
73#ifndef _GCC_PTRDIFF_T
74#define _PTRDIFF_T
75#define _T_PTRDIFF_
76#define _T_PTRDIFF
77#define __PTRDIFF_T
78#define _PTRDIFF_T_
79#define ___int_ptrdiff_t_h
80#define _GCC_PTRDIFF_T
81#ifndef __PTRDIFF_TYPE__
82#define __PTRDIFF_TYPE__ long int
83#endif
84typedef __PTRDIFF_TYPE__ ptrdiff_t;
85#endif /* _GCC_PTRDIFF_T */
86#endif /* ___int_ptrdiff_t_h */
87#endif /* _PTRDIFF_T_ */
88#endif /* __PTRDIFF_T */
89#endif /* _T_PTRDIFF */
90#endif /* _T_PTRDIFF_ */
91#endif /* _PTRDIFF_T */
92
93/* If this symbol has done its job, get rid of it. */
94#undef __need_ptrdiff_t
95
96#endif /* _STDDEF_H or __need_ptrdiff_t. */
97
98/* Unsigned type of `sizeof' something. */
99
100/* Define this type if we are doing the whole job,
101 or if we want this type in particular. */
102#if defined (_STDDEF_H) || defined (__need_size_t)
103#ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
104#ifndef _SYS_SIZE_T_H
105#ifndef _T_SIZE_
106#ifndef _T_SIZE
107#ifndef __SIZE_T
108#ifndef _SIZE_T_
109#ifndef ___int_size_t_h
110#ifndef _GCC_SIZE_T
111#ifndef _SIZET_
112#define _SIZE_T
113#define _SYS_SIZE_T_H
114#define _T_SIZE_
115#define _T_SIZE
116#define __SIZE_T
117#define _SIZE_T_
118#define ___int_size_t_h
119#define _GCC_SIZE_T
120#define _SIZET_
121#ifndef __SIZE_TYPE__
122#define __SIZE_TYPE__ long unsigned int
123#endif
124#if !(defined (__GNUG__) && defined (size_t))
125typedef __SIZE_TYPE__ size_t;
126#endif /* !(defined (__GNUG__) && defined (size_t)) */
127#endif /* _SIZET_ */
128#endif /* _GCC_SIZE_T */
129#endif /* ___int_size_t_h */
130#endif /* _SIZE_T_ */
131#endif /* __SIZE_T */
132#endif /* _T_SIZE */
133#endif /* _T_SIZE_ */
134#endif /* _SYS_SIZE_T_H */
135#endif /* _SIZE_T */
136#undef __need_size_t
137#endif /* _STDDEF_H or __need_size_t. */
138
139
140/* Wide character type.
141 Locale-writers should change this as necessary to
142 be big enough to hold unique values not between 0 and 127,
143 and not (wchar_t) -1, for each defined multibyte character. */
144
145/* Define this type if we are doing the whole job,
146 or if we want this type in particular. */
147#if defined (_STDDEF_H) || defined (__need_wchar_t)
148#ifndef _WCHAR_T
149#ifndef _T_WCHAR_
150#ifndef _T_WCHAR
151#ifndef __WCHAR_T
152#ifndef _WCHAR_T_
153#ifndef ___int_wchar_t_h
154#ifndef _GCC_WCHAR_T
155#define _WCHAR_T
156#define _T_WCHAR_
157#define _T_WCHAR
158#define __WCHAR_T
159#define _WCHAR_T_
160#define ___int_wchar_t_h
161#define _GCC_WCHAR_T
162#ifndef __WCHAR_TYPE__
163#define __WCHAR_TYPE__ int
164#endif
165#ifdef __GNUG__
166/* In C++, wchar_t is a distinct basic type,
167 and we can expect __wchar_t to be defined by cc1plus. */
168typedef __wchar_t wchar_t;
169#else
170/* In C, cpp tells us which type to make an alias for. */
171typedef __WCHAR_TYPE__ wchar_t;
172#endif
173#endif
174#endif
175#endif
176#endif
177#endif
178#endif
179#endif
180#undef __need_wchar_t
181#endif /* _STDDEF_H or __need_wchar_t. */
182
183/* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
184 are already defined. */
185#ifdef _ANSI_H_
186#ifdef _GCC_PTRDIFF_T_
187#undef _PTRDIFF_T_
188#endif
189#ifdef _GCC_SIZE_T_
190#undef _SIZE_T_
191#endif
192#ifdef _GCC_WCHAR_T_
193#undef _WCHAR_T_
194#endif
195#endif /* _ANSI_H_ */
196
197#endif /* __sys_stdtypes_h */
198
199/* A null pointer constant. */
200
201#if defined (_STDDEF_H) || defined (__need_NULL)
202#undef NULL /* in case <stdio.h> has defined it. */
203#define NULL ((void *)0)
204#endif /* NULL not defined and <stddef.h> or need NULL. */
205#undef __need_NULL
206
207#ifdef _STDDEF_H
208
209/* Offset of member MEMBER in a struct of type TYPE. */
210
211#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
212
213#endif /* _STDDEF_H was defined this time */
214
215#endif /* _ANSI_STDDEF_H was not defined before */
216#endif /* _STDDEF_H_ was not defined before */
217#endif /* _STDDEF_H was not defined before */