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