500ec3f8f3
In the case of is_unsigned() and is_signed(), the natural thing would be to compare to 0: #define is_unsigned(x) (((typeof(x)) -1) > 0) #define is_signed(x) (((typeof(x)) -1) < 0) However, that would trigger -Wtype-limits, so we compare against 1, which silences that, and does the same job. Signed-off-by: Alejandro Colomar <alx@kernel.org>
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
// SPDX-FileCopyrightText: 2022-2024, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_TYPETRAITS_H_
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#define SHADOW_INCLUDE_LIB_TYPETRAITS_H_
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#include <config.h>
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#include "sizeof.h"
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#define is_unsigned(x) \
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( \
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(typeof(x)) -1 > 1 \
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)
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#define is_signed(x) \
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( \
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(typeof(x)) -1 < 1 \
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)
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#define stype_max(T) \
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( \
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(T) (((((T) 1 << (WIDTHOF(T) - 2)) - 1) << 1) + 1) \
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)
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#define utype_max(T) \
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( \
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(T) -1 \
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)
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#define type_max(T) \
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( \
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(T) (is_signed(T) ? stype_max(T) : utype_max(T)) \
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)
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#define type_min(T) \
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( \
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(T) ~type_max(T) \
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)
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#endif // include guard
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