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1/* ANSI and traditional C compatability macros
2 Copyright (C) 1991-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5This program is free software; you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation; either version 2 of the License, or
8(at your option) any later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program; if not, write to the Free Software
17Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
18
19/* ANSI and traditional C compatibility macros
20
21 ANSI C is assumed if __STDC__ is #defined.
22
23 Macro ANSI C definition Traditional C definition
24 ----- ---- - ---------- ----------- - ----------
25 PTR `void *' `char *'
26 const not defined `'
27 volatile not defined `'
28 signed not defined `'
29
30 For ease of writing code which uses GCC extensions but needs to be
31 portable to other compilers, we provide the GCC_VERSION macro that
32 simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
33 wrappers around __attribute__. Also, __extension__ will be #defined
34 to nothing if it doesn't work. See below. */
35
36#ifndef _ANSIDECL_H
37#define _ANSIDECL_H 1
38
39#ifdef __cplusplus
40extern "C" {
41#endif
42
43/* Every source file includes this file,
44 so they will all get the switch for lint. */
45/* LINTLIBRARY */
46
47/* Using MACRO(x,y) in cpp #if conditionals does not work with some
48 older preprocessors. Thus we can't define something like this:
49
50#define HAVE_GCC_VERSION(MAJOR, MINOR) \
51 (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))
52
53and then test "#if HAVE_GCC_VERSION(2,7)".
54
55So instead we use the macro below and test it against specific values. */
56
57/* This macro simplifies testing whether we are using gcc, and if it
58 is of a particular minimum version. (Both major & minor numbers are
59 significant.) This macro will evaluate to 0 if we are not using
60 gcc at all. */
61#ifndef GCC_VERSION
62#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
63#endif /* GCC_VERSION */
64
65#if defined (__STDC__) || defined(__cplusplus) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32)
66/* All known AIX compilers implement these things (but don't always
67 define __STDC__). The RISC/OS MIPS compiler defines these things
68 in SVR4 mode, but does not define __STDC__. */
69/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other
70 C++ compilers, does not define __STDC__, though it acts as if this
71 was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */
72
73#define PTR void *
74
75#undef const
76#undef volatile
77#undef signed
78
79/* inline requires special treatment; it's in C99, and GCC >=2.7 supports
80 it too, but it's not in C89. */
81#undef inline
82#if __STDC_VERSION__ >= 199901L || defined(__cplusplus) || (defined(__SUNPRO_C) && defined(__C99FEATURES__))
83/* it's a keyword */
84#else
85# if GCC_VERSION >= 2007
86# define inline __inline__ /* __inline__ prevents -pedantic warnings */
87# else
88# define inline /* nothing */
89# endif
90#endif
91
92#else /* Not ANSI C. */
93
94#define PTR char *
95
96/* some systems define these in header files for non-ansi mode */
97#undef const
98#undef volatile
99#undef signed
100#undef inline
101#define const
102#define volatile
103#define signed
104#define inline
105
106#endif /* ANSI C. */
107
108/* Define macros for some gcc attributes. This permits us to use the
109 macros freely, and know that they will come into play for the
110 version of gcc in which they are supported. */
111
112#if (GCC_VERSION < 2007)
113# define __attribute__(x)
114#endif
115
116/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
117#ifndef ATTRIBUTE_MALLOC
118# if (GCC_VERSION >= 2096)
119# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
120# else
121# define ATTRIBUTE_MALLOC
122# endif /* GNUC >= 2.96 */
123#endif /* ATTRIBUTE_MALLOC */
124
125/* Attributes on labels were valid as of gcc 2.93 and g++ 4.5. For
126 g++ an attribute on a label must be followed by a semicolon. */
127#ifndef ATTRIBUTE_UNUSED_LABEL
128# ifndef __cplusplus
129# if GCC_VERSION >= 2093
130# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
131# else
132# define ATTRIBUTE_UNUSED_LABEL
133# endif
134# else
135# if GCC_VERSION >= 4005
136# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ;
137# else
138# define ATTRIBUTE_UNUSED_LABEL
139# endif
140# endif
141#endif
142
143/* Similarly to ARG_UNUSED below. Prior to GCC 3.4, the C++ frontend
144 couldn't parse attributes placed after the identifier name, and now
145 the entire compiler is built with C++. */
146#ifndef ATTRIBUTE_UNUSED
147#if GCC_VERSION >= 3004
148# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
149#else
150#define ATTRIBUTE_UNUSED
151#endif
152#endif /* ATTRIBUTE_UNUSED */
153
154/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the
155 identifier name. */
156#if ! defined(__cplusplus) || (GCC_VERSION >= 3004)
157# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED
158#else /* !__cplusplus || GNUC >= 3.4 */
159# define ARG_UNUSED(NAME) NAME
160#endif /* !__cplusplus || GNUC >= 3.4 */
161
162#ifndef ATTRIBUTE_NORETURN
163#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
164#endif /* ATTRIBUTE_NORETURN */
165
166/* Attribute `nonnull' was valid as of gcc 3.3. */
167#ifndef ATTRIBUTE_NONNULL
168# if (GCC_VERSION >= 3003)
169# define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
170# else
171# define ATTRIBUTE_NONNULL(m)
172# endif /* GNUC >= 3.3 */
173#endif /* ATTRIBUTE_NONNULL */
174
175/* Attribute `returns_nonnull' was valid as of gcc 4.9. */
176#ifndef ATTRIBUTE_RETURNS_NONNULL
177# if (GCC_VERSION >= 4009)
178# define ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
179# else
180# define ATTRIBUTE_RETURNS_NONNULL
181# endif /* GNUC >= 4.9 */
182#endif /* ATTRIBUTE_RETURNS_NONNULL */
183
184/* Attribute `pure' was valid as of gcc 3.0. */
185#ifndef ATTRIBUTE_PURE
186# if (GCC_VERSION >= 3000)
187# define ATTRIBUTE_PURE __attribute__ ((__pure__))
188# else
189# define ATTRIBUTE_PURE
190# endif /* GNUC >= 3.0 */
191#endif /* ATTRIBUTE_PURE */
192
193/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL.
194 This was the case for the `printf' format attribute by itself
195 before GCC 3.3, but as of 3.3 we need to add the `nonnull'
196 attribute to retain this behavior. */
197#ifndef ATTRIBUTE_PRINTF
198#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
199#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
200#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
201#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
202#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
203#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
204#endif /* ATTRIBUTE_PRINTF */
205
206/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on
207 a function pointer. Format attributes were allowed on function
208 pointers as of gcc 3.1. */
209#ifndef ATTRIBUTE_FPTR_PRINTF
210# if (GCC_VERSION >= 3001)
211# define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n)
212# else
213# define ATTRIBUTE_FPTR_PRINTF(m, n)
214# endif /* GNUC >= 3.1 */
215# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2)
216# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3)
217# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4)
218# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5)
219# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6)
220#endif /* ATTRIBUTE_FPTR_PRINTF */
221
222/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL. A
223 NULL format specifier was allowed as of gcc 3.3. */
224#ifndef ATTRIBUTE_NULL_PRINTF
225# if (GCC_VERSION >= 3003)
226# define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
227# else
228# define ATTRIBUTE_NULL_PRINTF(m, n)
229# endif /* GNUC >= 3.3 */
230# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
231# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
232# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
233# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
234# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
235#endif /* ATTRIBUTE_NULL_PRINTF */
236
237/* Attribute `sentinel' was valid as of gcc 3.5. */
238#ifndef ATTRIBUTE_SENTINEL
239# if (GCC_VERSION >= 3005)
240# define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
241# else
242# define ATTRIBUTE_SENTINEL
243# endif /* GNUC >= 3.5 */
244#endif /* ATTRIBUTE_SENTINEL */
245
246
247#ifndef ATTRIBUTE_ALIGNED_ALIGNOF
248# if (GCC_VERSION >= 3000)
249# define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
250# else
251# define ATTRIBUTE_ALIGNED_ALIGNOF(m)
252# endif /* GNUC >= 3.0 */
253#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */
254
255/* Useful for structures whose layout must match some binary specification
256 regardless of the alignment and padding qualities of the compiler. */
257#ifndef ATTRIBUTE_PACKED
258# define ATTRIBUTE_PACKED __attribute__ ((packed))
259#endif
260
261/* Attribute `hot' and `cold' was valid as of gcc 4.3. */
262#ifndef ATTRIBUTE_COLD
263# if (GCC_VERSION >= 4003)
264# define ATTRIBUTE_COLD __attribute__ ((__cold__))
265# else
266# define ATTRIBUTE_COLD
267# endif /* GNUC >= 4.3 */
268#endif /* ATTRIBUTE_COLD */
269#ifndef ATTRIBUTE_HOT
270# if (GCC_VERSION >= 4003)
271# define ATTRIBUTE_HOT __attribute__ ((__hot__))
272# else
273# define ATTRIBUTE_HOT
274# endif /* GNUC >= 4.3 */
275#endif /* ATTRIBUTE_HOT */
276
277/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9. */
278#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
279# if (GCC_VERSION >= 4009)
280# define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
281# else
282# define ATTRIBUTE_NO_SANITIZE_UNDEFINED
283# endif /* GNUC >= 4.9 */
284#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */
285
286/* Attribute 'nonstring' was valid as of gcc 8. */
287#ifndef ATTRIBUTE_NONSTRING
288# if GCC_VERSION >= 8000
289# define ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
290# else
291# define ATTRIBUTE_NONSTRING
292# endif
293#endif
294
295/* We use __extension__ in some places to suppress -pedantic warnings
296 about GCC extensions. This feature didn't work properly before
297 gcc 2.8. */
298#if GCC_VERSION < 2008
299#define __extension__
300#endif
301
302/* This is used to declare a const variable which should be visible
303 outside of the current compilation unit. Use it as
304 EXPORTED_CONST int i = 1;
305 This is because the semantics of const are different in C and C++.
306 "extern const" is permitted in C but it looks strange, and gcc
307 warns about it when -Wc++-compat is not used. */
308#ifdef __cplusplus
309#define EXPORTED_CONST extern const
310#else
311#define EXPORTED_CONST const
312#endif
313
314/* Be conservative and only use enum bitfields with C++ or GCC.
315 FIXME: provide a complete autoconf test for buggy enum bitfields. */
316
317#ifdef __cplusplus
318#define ENUM_BITFIELD(TYPE) enum TYPE
319#elif (GCC_VERSION > 2000)
320#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
321#else
322#define ENUM_BITFIELD(TYPE) unsigned int
323#endif
324
325#if __cpp_constexpr >= 200704
326#define CONSTEXPR constexpr
327#else
328#define CONSTEXPR
329#endif
330
331/* C++11 adds the ability to add "override" after an implementation of a
332 virtual function in a subclass, to:
333 (A) document that this is an override of a virtual function
334 (B) allow the compiler to issue a warning if it isn't (e.g. a mismatch
335 of the type signature).
336
337 Similarly, it allows us to add a "final" to indicate that no subclass
338 may subsequently override the vfunc.
339
340 Provide OVERRIDE and FINAL as macros, allowing us to get these benefits
341 when compiling with C++11 support, but without requiring C++11.
342
343 For gcc, use "-std=c++11" to enable C++11 support; gcc 6 onwards enables
344 this by default (actually GNU++14). */
345
346#if defined __cplusplus
347# if __cplusplus >= 201103
348 /* C++11 claims to be available: use it. Final/override were only
349 implemented in 4.7, though. */
350# if GCC_VERSION < 4007
351# define OVERRIDE
352# define FINAL
353# else
354# define OVERRIDE override
355# define FINAL final
356# endif
357# elif GCC_VERSION >= 4007
358 /* G++ 4.7 supports __final in C++98. */
359# define OVERRIDE
360# define FINAL __final
361# else
362 /* No C++11 support; leave the macros empty. */
363# define OVERRIDE
364# define FINAL
365# endif
366#else
367 /* No C++11 support; leave the macros empty. */
368# define OVERRIDE
369# define FINAL
370#endif
371
372/* A macro to disable the copy constructor and assignment operator.
373 When building with C++11 and above, the methods are explicitly
374 deleted, causing a compile-time error if something tries to copy.
375 For C++03, this just declares the methods, causing a link-time
376 error if the methods end up called (assuming you don't
377 define them). For C++03, for best results, place the macro
378 under the private: access specifier, like this,
379
380 class name_lookup
381 {
382 private:
383 DISABLE_COPY_AND_ASSIGN (name_lookup);
384 };
385
386 so that most attempts at copy are caught at compile-time. */
387
388#if __cplusplus >= 201103
389#define DISABLE_COPY_AND_ASSIGN(TYPE) \
390 TYPE (const TYPE&) = delete; \
391 void operator= (const TYPE &) = delete
392 #else
393#define DISABLE_COPY_AND_ASSIGN(TYPE) \
394 TYPE (const TYPE&); \
395 void operator= (const TYPE &)
396#endif /* __cplusplus >= 201103 */
397
398#ifdef __cplusplus
399}
400#endif
401
402#endif /* ansidecl.h */
403

Warning: That file was not part of the compilation database. It may have many parsing errors.