solanum/tests/tap/macros.h

98 lines
3.7 KiB
C
Raw Normal View History

2017-07-25 20:02:45 +00:00
/*
* Helpful macros for TAP header files.
*
* This is not, strictly speaking, related to TAP, but any TAP add-on is
* probably going to need these macros, so define them in one place so that
* everyone can pull them in.
*
* This file is part of C TAP Harness. The current version plus supporting
* documentation is at <https://www.eyrie.org/~eagle/software/c-tap-harness/>.
*
* Copyright 2008, 2012, 2013, 2015 Russ Allbery <eagle@eyrie.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef TAP_MACROS_H
#define TAP_MACROS_H 1
/*
* __attribute__ is available in gcc 2.5 and later, but only with gcc 2.7
* could you use the __format__ form of the attributes, which is what we use
* (to avoid confusion with other macros), and only with gcc 2.96 can you use
* the attribute __malloc__. 2.96 is very old, so don't bother trying to get
* the other attributes to work with GCC versions between 2.7 and 2.96.
*/
#ifndef __attribute__
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
# define __attribute__(spec) /* empty */
# endif
#endif
/*
* We use __alloc_size__, but it was only available in fairly recent versions
* of GCC. Suppress warnings about the unknown attribute if GCC is too old.
* We know that we're GCC at this point, so we can use the GCC variadic macro
* extension, which will still work with versions of GCC too old to have C99
* variadic macro support.
*/
#if !defined(__attribute__) && !defined(__alloc_size__)
# if defined(__GNUC__) && !defined(__clang__)
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
# define __alloc_size__(spec, args...) /* empty */
# endif
# endif
#endif
/* Suppress __warn_unused_result__ if gcc is too old. */
#if !defined(__attribute__) && !defined(__warn_unused_result__)
# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
# define __warn_unused_result__ /* empty */
# endif
#endif
/*
* LLVM and Clang pretend to be GCC but don't support all of the __attribute__
* settings that GCC does. For them, suppress warnings about unknown
* attributes on declarations. This unfortunately will affect the entire
* compilation context, but there's no push and pop available.
*/
#if !defined(__attribute__) && (defined(__llvm__) || defined(__clang__))
# pragma GCC diagnostic ignored "-Wattributes"
#endif
/* Used for unused parameters to silence gcc warnings. */
#define UNUSED __attribute__((__unused__))
/*
* BEGIN_DECLS is used at the beginning of declarations so that C++
* compilers don't mangle their names. END_DECLS is used at the end.
*/
#undef BEGIN_DECLS
#undef END_DECLS
#ifdef __cplusplus
# define BEGIN_DECLS extern "C" {
# define END_DECLS }
#else
# define BEGIN_DECLS /* empty */
# define END_DECLS /* empty */
#endif
#endif /* TAP_MACROS_H */