2 #define __PDCLIB_AUX_H __PDCLIB_AUX_H
4 /* Auxiliary PDCLib code <_PDCLIB_aux.h>
6 This file is part of the Public Domain C Library (PDCLib).
7 Permission is granted to use, modify, and / or redistribute at will.
10 /* -------------------------------------------------------------------------- */
11 /* You should not have to edit anything in this file; if you DO have to, it */
12 /* would be considered a bug / missing feature: notify the author(s). */
13 /* -------------------------------------------------------------------------- */
15 /* -------------------------------------------------------------------------- */
16 /* Standard Version */
17 /* -------------------------------------------------------------------------- */
19 /* Many a compiler gets this wrong, so you might have to hardcode it instead. */
22 #error Compiler does not define _ _STDC_ _ to 1 (not standard-compliant)!
25 #if defined(_PDCLIB_C_VERSION)
26 /* Pass - conditional simplification case */
27 #elif !defined(__STDC_VERSION__)
28 #define _PDCLIB_C_VERSION 1990
29 #elif __STDC_VERSION__ == 199409L
30 #define _PDCLIB_C_VERSION 1995
31 #elif __STDC_VERSION__ == 199901L
32 #define _PDCLIB_C_VERSION 1999
33 #elif __STDC_VERSION__ == 201112L
34 #define _PDCLIB_C_VERSION 2011
36 #error Unsupported _ _STDC_VERSION_ _ (__STDC_VERSION__) (supported: ISO/IEC 9899:1990, 9899/AMD1:1995, 9899:1999, 9899:2011).
39 #if !defined(__cplusplus) || defined(_PDCLIB_CXX_VERSION)
40 #define _PDCLIB_CXX_VERSION 0
41 #elif __cplusplus == 201103L
42 #define _PDCLIB_CXX_VERSION 2011
43 /* TODO: Do we want this? */
44 #if _PDCLIB_C_VERSION < 2011
45 #undef _PDCLIB_C_VERSION
46 #define _PDCLIB_C_VERSION 2011
48 #elif __cplusplus == 199711L
49 #define _PDCLIB_CXX_VERSION 1997
51 #error Unsupported _ _cplusplus (__cplusplus) (supported: ISO/IEC 14882:1997, ISO/IEC 14882:2011).
54 #ifndef __STDC_HOSTED__
55 #error Compiler does not define _ _STDC_HOSTED_ _ (not standard-compliant)!
56 #elif __STDC_HOSTED__ == 0
57 #define _PDCLIB_HOSTED 0
58 #elif __STDC_HOSTED__ == 1
59 #define _PDCLIB_HOSTED 1
61 #error Compiler does not define _ _STDC_HOSTED_ _ to 0 or 1 (not standard-compliant)!
65 #define _PDCLIB_BEGIN_EXTERN_C extern "C" {
66 #define _PDCLIB_END_EXTERN_C }
67 typedef bool _PDCLIB_bool;
69 #define _PDCLIB_BEGIN_EXTERN_C
70 #define _PDCLIB_END_EXTERN_C
71 typedef _Bool _PDCLIB_bool;
74 /* Clang style feature detection macros
75 * Note: It is common to #define __has_feature(0) if undefined so the presence
76 * of this macro does not guarantee it to be working
80 #define _PDCLIB_HAS_FEATURE(x) __has_feature(x)
82 #define _PDCLIB_HAS_FEATURE(x) (0)
85 #ifdef __has_extension
86 #define _PDCLIB_HAS_EXTENSION(x) __has_extension(x)
88 // Older versions of Clang use __has_feature instead
89 #define _PDCLIB_HAS_EXTENSION(x) _PDCLIB_HAS_FEATURE(x)
93 #define _PDCLIB_HAS_BUILTIN(x) __has_builtin(x)
95 #define _PDCLIB_HAS_BUILTIN(x) (0)
98 #ifdef __has_attribute
99 #define _PDCLIB_HAS_ATTRIBUTE(x) __has_attribute(x)
101 #define _PDCLIB_HAS_ATTRIBUTE(x) (0)
104 /* GCC feature detection macros */
106 #if defined(__GNUC__)
107 #define _PDCLIB_GCC_MIN(maj, min) \
108 ((__GNUC__ > maj) || (__GNUC__ == maj && __GNUC_MINOR__ >= min))
110 #define _PDCLIB_GCC_MIN(maj, min) (0)
113 /* Hybrid GCC/Clang feature detection macros */
114 #define _PDCLIB_GCC_FEATURE(x, gccmaj, gccmin) \
115 (_PDCLIB_HAS_FEATURE(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
117 #define _PDCLIB_GCC_EXTENSION(x, gccmaj, gccmin) \
118 (_PDCLIB_HAS_EXTENSION(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
120 #define _PDCLIB_GCC_BUILTIN(x, gccmaj, gccmin) \
121 (_PDCLIB_HAS_BUILTIN(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
123 #define _PDCLIB_GCC_ATTRIBUTE(x, gccmaj, gccmin) \
124 (_PDCLIB_HAS_ATTRIBUTE(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
126 /* Extension & Language feature detection */
128 #if _PDCLIB_C_VERSION >= 1999 || defined(__cplusplus)
130 #define _PDCLIB_restrict restrict
132 #define _PDCLIB_inline inline
135 #if _PDCLIB_CXX_VERSION >= 2011
136 #define _PDCLIB_nothrow noexcept
137 #define _PDCLIB_noexcept(x) noexcept(x)
138 #elif _PDCLIB_CXX_VERSION
139 #define _PDCLIB_nothrow throw()
140 #define _PDCLIB_noexcept
143 #if _PDCLIB_CXX_VERSION >= 2011 && _PDCLIB_GCC_FEATURE(cxx_attributes, 4, 8)
144 #define _PDCLIB_noreturn [[noreturn]]
145 #elif _PDCLIB_C_VERSION >= 2011 && _PDCLIB_GCC_FEATURE(c_noreturn, 4, 7)
146 #define _PDCLIB_noreturn _Noreturn
150 #define _PDCLIB_EXPORT __declspec(dllexport)
151 #define _PDCLIB_IMPORT __declspec(dllimport)
154 #if !defined(_PDCLIB_EXPORT) && _PDCLIB_GCC_ATTRIBUTE(__visibility__, 4, 0)
155 #define _PDCLIB_EXPORT __attribute__((__visibility__("protected")))
158 #if !defined(_PDCLIB_HIDDEN) && _PDCLIB_GCC_ATTRIBUTE(__visibility__, 4, 0)
159 #define _PDCLIB_HIDDEN __attribute__((__visibility__("hidden")))
162 #if !defined(_PDCLIB_nothrow) && _PDCLIB_GCC_ATTRIBUTE(__nothrow__, 4, 0)
163 #define _PDCLIB_nothrow __attribute__((__nothrow__))
164 #define _PDCLIB_noexcept
167 #if !defined(_PDCLIB_restrict) && _PDCLIB_GCC_MIN(3, 0)
168 #define _PDCLIB_restrict __restrict
171 #if !defined(_PDCLIB_inline) && _PDCLIB_GCC_MIN(3, 0)
172 #define _PDCLIB_inline __inline
175 #if !defined(_PDCLIB_noreturn) && _PDCLIB_GCC_ATTRIBUTE(__noreturn__, 3, 0)
176 /* If you don't use __noreturn__, then stdnoreturn.h will break things! */
177 #define _PDCLIB_noreturn __attribute__((__noreturn__))
180 #if !defined(_PDCLIB_DEPRECATED) && _PDCLIB_GCC_ATTRIBUTE(__deprecated__, 3, 0)
181 #define _PDCLIB_DEPRECATED __attribute__ ((__deprecated__))
184 #if !defined(_PDCLIB_UNREACHABLE) && _PDCLIB_GCC_BUILTIN(__builtin_unreachable, 4, 0)
185 #define _PDCLIB_UNREACHABLE __builtin_unreachable()
188 #if !defined(_PDCLIB_UNDEFINED) && defined(__GNUC__)
189 #define _PDCLIB_UNDEFINED(_var) \
190 do { __asm__("" : "=X"(_var)); } while(0)
193 /* No-op fallbacks */
195 #ifndef _PDCLIB_nothrow
196 #define _PDCLIB_nothrow
197 #define _PDCLIB_noexcept
200 #ifndef _PDCLIB_EXPORT
201 #define _PDCLIB_EXPORT
203 #ifndef _PDCLIB_IMPORT
204 #define _PDCLIB_IMPORT
206 #ifndef _PDCLIB_HIDDEN
207 #define _PDCLIB_HIDDEN
210 #if defined(_PDCLIB_SHARED)
211 #if defined(_PDCLIB_BUILD)
212 #define _PDCLIB_API _PDCLIB_EXPORT
214 #define _PDCLIB_API _PDCLIB_IMPORT
220 #ifndef _PDCLIB_restrict
221 #define _PDCLIB_restrict
224 #ifndef _PDCLIB_inline
225 #define _PDCLIB_inline
228 #ifndef _PDCLIB_noreturn
229 #define _PDCLIB_noreturn
232 #ifndef _PDCLIB_DEPRECATED
233 #define _PDCLIB_DEPRECATED
236 #ifndef _PDCLIB_UNREACHABLE
237 #define _PDCLIB_UNREACHABLE do {} while(0)
240 #ifndef _PDCLIB_UNDEFINED
241 #define _PDCLIB_UNDEFINED(_var) do {} while(0)
244 /*#if _PDCLIB_C_VERSION != 1999
245 #error PDCLib might not be fully conforming to either C89 or C95 prior to v2.x.
248 /* -------------------------------------------------------------------------- */
250 /* _PDCLIB_cc( x, y ) concatenates two preprocessor tokens without extending */
251 /* _PDCLIB_concat( x, y ) concatenates two preprocessor tokens with extending */
252 /* _PDCLIB_concat3( x, y, z ) is the same for three tokens */
253 /* _PDCLIB_static_assert( x ) provides a compile-time check mechanism */
254 /* -------------------------------------------------------------------------- */
256 #define _PDCLIB_cc( x, y ) x ## y
257 #define _PDCLIB_concat( x, y ) _PDCLIB_cc( x, y )
258 #define _PDCLIB_concat3( x, y, z ) _PDCLIB_concat( _PDCLIB_concat( x, y ), z )
259 #if _PDCLIB_C_VERSION >= 2011
260 #define _PDCLIB_static_assert _Static_assert
262 #define _PDCLIB_static_assert( e, m ) ;enum { _PDCLIB_concat( _PDCLIB_assert_, __LINE__ ) = 1 / ( !!( e ) ) }
265 #define _PDCLIB_symbol2value( x ) #x
266 #define _PDCLIB_symbol2string( x ) _PDCLIB_symbol2value( x )
268 /* Feature test macros
270 * All of the feature test macros come in the following forms
271 * _PDCLIB_*_MIN(min): Available in versions >= min
272 * _PDCLIB_*_MINMAX(min, max): Available in versions >= min <= max
273 * _PDCLIB_*_MAX(max): Availabel in versions <= max
275 * The defined tests are:
276 * C: C standard versions
277 * 1990, 1995, 1999, 2011
278 * CXX: C++ standard versions
280 * POSIX: POSIX extension versions.
281 * 1 (POSIX.2), 2 (POSIX.2), 199309L (POSIX.1b),
282 * 199506L (POSIX.1c), 200112L (2001), 200809L (2008)
283 * XOPEN: X/Open System Interface (XSI)/Single Unix Specification
284 * 0 (XPG4), 500 (SUSv2/UNIX98), 600 (SUSv3/UNIX03), 700 (SUSv4)
286 * Additionally, the macros
287 * _BSD_SOURCE, _SVID_SOURCE and _GNU_SOURCE
288 * are adhered to. If _GNU_SOURCE is defined, _XOPEN_SOURCE and
289 * _POSIX_C_SOURCE are defined to their most recent values to match glibc
292 * The intention of supporting these feature test macros is to ease
293 * application portability from these systems to PDCLib systems; in addition,
294 * it eases support for these standards by systems supporting them which are
295 * using PDCLib as their default C library.
297 * Applications targetting purely PDClib/PDCLib based platforms may define
298 * just _PDCLIB_EXTENSIONS, which will enable all supported extensions, plus
299 * all features from all supported versions of C and C++.
302 #define _PDCLIB_C_MIN(min) _PDCLIB_C_MINMAX(min, 3000)
303 #define _PDCLIB_CXX_MIN(min) _PDCLIB_CXX_MINMAX(min, 3000)
304 #define _PDCLIB_XOPEN_MIN(min) _PDCLIB_XOPEN_MINMAX(min, 30000000)
305 #define _PDCLIB_POSIX_MIN(min) _PDCLIB_POSIX_MINMAX(min, 30000000)
306 #define _PDCLIB_C_MAX(max) _PDCLIB_C_MINMAX(0, max)
307 #define _PDCLIB_CXX_MAX(max) _PDCLIB_CXX_MINMAX(0, max)
308 #define _PDCLIB_XOPEN_MAX(max) _PDCLIB_XOPEN_MINMAX(0, max)
309 #define _PDCLIB_POSIX_MAX(max) _PDCLIB_POSIX_MINMAX(0, max)
310 #if defined(_PDCLIB_EXTENSIONS) || defined(_PDCLIB_BUILD)
311 #define _PDCLIB_C_MINMAX(min, max) 1
312 #define _PDCLIB_CXX_MINMAX(min, max) 1
313 #define _PDCLIB_POSIX_MINMAX(min, max) 1
314 #define _PDCLIB_XOPEN_MINMAX(min, max) 1
316 #undef _PDCLIB_EXTENSIONS
317 #undef _PDCLIB_BSD_SOURCE
318 #undef _PDCLIB_SVID_SOURCE
319 #undef _PDCLIB_GNU_SOURCE
321 #define _PDCLIB_EXTENSIONS 1
322 #define _PDCLIB_BSD_SOURCE 1
323 #define _PDCLIB_SVID_SOURCE 1
324 #define _PDCLIB_GNU_SOURCE 1
326 #define _PDCLIB_C_MINMAX(min, max) \
327 (_PDCLIB_C_VERSION >= (min) && _PDCLIB_C_VERSION <= (max))
328 #define _PDCLIB_CXX_MINMAX(min, max) \
329 (_PDCLIB_CXX_VERSION >= (min) && _PDCLIB_CXX_VERSION <= (max))
330 #define _PDCLIB_XOPEN_MINMAX(min, max) \
331 (defined(_XOPEN_SOURCE) \
332 && _XOPEN_SOURCE >= (min) && _XOPEN_SOURCE <= (max))
333 #define _PDCLIB_POSIX_MINMAX(min, max) \
334 (defined(_POSIX_C_SOURCE) \
335 && _POSIX_C_SOURCE >= (min) && _POSIX_C_SOURCE <= (max))
337 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE-1 == -1)
338 /* If _XOPEN_SOURCE is defined as empty, redefine here as zero */
340 #define _XOPEN_SOURCE 0
343 #if defined(_GNU_SOURCE)
344 #define _PDCLIB_GNU_SOURCE 1
345 #define _PDCLIB_SVID_SOURCE 1
346 #define _PDCLIB_BSD_SOURCE 1
348 #define _XOPEN_SOURCE 700
350 #define _PDCLIB_GNU_SOURCE 0
353 #if defined(_PDCLIB_BSD_SOURCE)
355 #elif defined(_BSD_SOURCE)
356 #define _PDCLIB_BSD_SOURCE 1
358 #define _PDCLIB_BSD_SOURCE 0
361 #if defined(_PDCLIB_SVID_SOURCE)
363 #elif defined(_SVID_SOURCE)
364 #define _PDCLIB_SVID_SOURCE 1
366 #define _PDCLIB_SVID_SOURCE 0
369 #if _PDCLIB_XOPEN_MIN(700) && !_PDCLIB_POSIX_MIN(200809L)
370 #undef _POSIX_C_SOURCE
371 #define _POSIX_C_SOURCE 2008098L
372 #elif _PDCLIB_XOPEN_MIN(600) && !_PDCLIB_POSIX_MIN(200112L)
373 #undef _POSIX_C_SOURCE
374 #define _POSIX_C_SOURCE 200112L
375 #elif _PDCLIB_XOPEN_MIN(0) && !_PDCLIB_POSIX_MIN(2)
376 #undef _POSIX_C_SOURCE
377 #define _POSIX_C_SOURCE 2
380 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
381 #define _POSIX_C_SOURCE 1