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https://gitlab.uni-freiburg.de/opensourcevdi/spice-common
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Update verify.h to latest version
This commit is contained in:
Christophe Fergeau
parent
5359304713
commit
62b996ffb0
144
common/verify.h
144
common/verify.h
@ -1,24 +1,24 @@
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/* Compile-time assert-like macros.
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Copyright (C) 2005-2006, 2009-2013 Free Software Foundation, Inc.
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Copyright (C) 2005-2006, 2009-2016 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert, Bruno Haible, and Jim Meyering. */
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#ifndef _GL_VERIFY_H
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# define _GL_VERIFY_H
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#define _GL_VERIFY_H
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/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert works as per C11.
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@ -31,14 +31,24 @@
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Use this only with GCC. If we were willing to slow 'configure'
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down we could also use it with other compilers, but since this
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affects only the quality of diagnostics, why bother? */
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# if (4 < __GNUC__ || (__GNUC__ == 4 && 6 <= __GNUC_MINOR__)) && !defined __cplusplus
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# define _GL_HAVE__STATIC_ASSERT 1
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# endif
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#if (4 < __GNUC__ + (6 <= __GNUC_MINOR__) \
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&& (201112L <= __STDC_VERSION__ || !defined __STRICT_ANSI__) \
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&& !defined __cplusplus)
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# define _GL_HAVE__STATIC_ASSERT 1
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#endif
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/* The condition (99 < __GNUC__) is temporary, until we know about the
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first G++ release that supports static_assert. */
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# if (99 < __GNUC__) && defined __cplusplus
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# define _GL_HAVE_STATIC_ASSERT 1
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# endif
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#if (99 < __GNUC__) && defined __cplusplus
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# define _GL_HAVE_STATIC_ASSERT 1
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#endif
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/* FreeBSD 9.1 <sys/cdefs.h>, included by <stddef.h> and lots of other
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system headers, defines a conflicting _Static_assert that is no
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better than ours; override it. */
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#ifndef _GL_HAVE_STATIC_ASSERT
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# include <stddef.h>
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# undef _Static_assert
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#endif
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/* Each of these macros verifies that its argument R is nonzero. To
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be portable, R should be an integer constant expression. Unlike
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@ -141,50 +151,50 @@
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Use a template type to work around the problem. */
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/* Concatenate two preprocessor tokens. */
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# define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)
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# define _GL_CONCAT0(x, y) x##y
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#define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)
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#define _GL_CONCAT0(x, y) x##y
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/* _GL_COUNTER is an integer, preferably one that changes each time we
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use it. Use __COUNTER__ if it works, falling back on __LINE__
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otherwise. __LINE__ isn't perfect, but it's better than a
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constant. */
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# if defined __COUNTER__ && __COUNTER__ != __COUNTER__
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# define _GL_COUNTER __COUNTER__
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# else
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# define _GL_COUNTER __LINE__
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# endif
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#if defined __COUNTER__ && __COUNTER__ != __COUNTER__
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# define _GL_COUNTER __COUNTER__
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#else
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# define _GL_COUNTER __LINE__
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#endif
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/* Generate a symbol with the given prefix, making it unique if
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possible. */
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# define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)
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#define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)
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/* Verify requirement R at compile-time, as an integer constant expression
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that returns 1. If R is false, fail at compile-time, preferably
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with a diagnostic that includes the string-literal DIAGNOSTIC. */
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# define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \
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(!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))
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#define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \
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(!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))
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# ifdef __cplusplus
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# if !GNULIB_defined_struct__gl_verify_type
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#ifdef __cplusplus
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# if !GNULIB_defined_struct__gl_verify_type
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template <int w>
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struct _gl_verify_type {
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unsigned int _gl_verify_error_if_negative: w;
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};
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# define GNULIB_defined_struct__gl_verify_type 1
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# endif
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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_gl_verify_type<(R) ? 1 : -1>
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# elif defined _GL_HAVE__STATIC_ASSERT
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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struct { \
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_Static_assert (R, DIAGNOSTIC); \
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int _gl_dummy; \
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}
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# else
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; }
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# define GNULIB_defined_struct__gl_verify_type 1
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# endif
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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_gl_verify_type<(R) ? 1 : -1>
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#elif defined _GL_HAVE__STATIC_ASSERT
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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struct { \
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_Static_assert (R, DIAGNOSTIC); \
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int _gl_dummy; \
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}
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#else
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# define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
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struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; }
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#endif
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/* Verify requirement R at compile-time, as a declaration without a
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trailing ';'. If R is false, fail at compile-time, preferably
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@ -193,23 +203,23 @@ template <int w>
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Unfortunately, unlike C11, this implementation must appear as an
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ordinary declaration, and cannot appear inside struct { ... }. */
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# ifdef _GL_HAVE__STATIC_ASSERT
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# define _GL_VERIFY _Static_assert
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# else
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# define _GL_VERIFY(R, DIAGNOSTIC) \
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extern int (*_GL_GENSYM (_gl_verify_function) (void)) \
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[_GL_VERIFY_TRUE (R, DIAGNOSTIC)]
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# endif
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#ifdef _GL_HAVE__STATIC_ASSERT
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# define _GL_VERIFY _Static_assert
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#else
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# define _GL_VERIFY(R, DIAGNOSTIC) \
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extern int (*_GL_GENSYM (_gl_verify_function) (void)) \
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[_GL_VERIFY_TRUE (R, DIAGNOSTIC)]
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#endif
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/* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h. */
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# ifdef _GL_STATIC_ASSERT_H
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# if !defined _GL_HAVE__STATIC_ASSERT && !defined _Static_assert
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# define _Static_assert(R, DIAGNOSTIC) _GL_VERIFY (R, DIAGNOSTIC)
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# endif
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# if !defined _GL_HAVE_STATIC_ASSERT && !defined static_assert
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# define static_assert _Static_assert /* C11 requires this #define. */
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# endif
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#ifdef _GL_STATIC_ASSERT_H
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# if !defined _GL_HAVE__STATIC_ASSERT && !defined _Static_assert
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# define _Static_assert(R, DIAGNOSTIC) _GL_VERIFY (R, DIAGNOSTIC)
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# endif
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# if !defined _GL_HAVE_STATIC_ASSERT && !defined static_assert
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# define static_assert _Static_assert /* C11 requires this #define. */
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# endif
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#endif
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/* @assert.h omit start@ */
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@ -227,18 +237,42 @@ template <int w>
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verify_true is obsolescent; please use verify_expr instead. */
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# define verify_true(R) _GL_VERIFY_TRUE (R, "verify_true (" #R ")")
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#define verify_true(R) _GL_VERIFY_TRUE (R, "verify_true (" #R ")")
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/* Verify requirement R at compile-time. Return the value of the
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expression E. */
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# define verify_expr(R, E) \
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(_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))
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#define verify_expr(R, E) \
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(_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))
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/* Verify requirement R at compile-time, as a declaration without a
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trailing ';'. */
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# define verify(R) _GL_VERIFY (R, "verify (" #R ")")
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#define verify(R) _GL_VERIFY (R, "verify (" #R ")")
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#ifndef __has_builtin
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# define __has_builtin(x) 0
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#endif
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/* Assume that R always holds. This lets the compiler optimize
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accordingly. R should not have side-effects; it may or may not be
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evaluated. Behavior is undefined if R is false. */
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#if (__has_builtin (__builtin_unreachable) \
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|| 4 < __GNUC__ + (5 <= __GNUC_MINOR__))
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# define assume(R) ((R) ? (void) 0 : __builtin_unreachable ())
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#elif 1200 <= _MSC_VER
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# define assume(R) __assume (R)
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#elif (defined lint \
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&& (__has_builtin (__builtin_trap) \
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|| 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__))))
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/* Doing it this way helps various packages when configured with
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--enable-gcc-warnings, which compiles with -Dlint. It's nicer
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when 'assume' silences warnings even with older GCCs. */
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# define assume(R) ((R) ? (void) 0 : __builtin_trap ())
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#else
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# define assume(R) ((void) (0 && (R)))
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#endif
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/* @assert.h omit end@ */
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