| 1 | /** @file
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| 2 | Macros to simplify boolean expressions and operations.
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| 3 |
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| 4 | This header is not specified by the C95 standard but is included here for
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| 5 | operational convenience.
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| 6 |
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| 7 | The macro bool expands to _Bool, as required by the C99 specification.
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| 8 | This subsequently expands to BOOLEAN, is a UEFI data type which is automatically
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| 9 | defined correctly for the target CPU architecture.
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| 10 |
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| 11 | The remaining three macros are suitable for use in #if preprocessing
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| 12 | directives. They are true, which expands to the integer constant 1,
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| 13 | false, which expands to the integer constant 0, and
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| 14 | __bool_true_false_are_defined which expands to the integer constant 1.
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| 15 |
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| 16 | A program may undefine and perhaps then redefine the
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| 17 | macros bool, true, and false.
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| 18 |
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| 19 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
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| 20 | This program and the accompanying materials are licensed and made available under
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| 21 | the terms and conditions of the BSD License that accompanies this distribution.
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| 22 | The full text of the license may be found at
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| 23 | http://opensource.org/licenses/bsd-license.
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| 24 |
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| 25 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 26 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 27 | **/
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| 28 | #ifndef _STDBOOL_H
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| 29 | #define _STDBOOL_H
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| 30 | #include <sys/EfiCdefs.h>
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| 31 |
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| 32 | #define bool _Bool
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| 33 | #define true 1
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| 34 | #define false 0
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| 35 | #define __bool_true_false_are_defined 1
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| 36 |
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| 37 | #endif /* _STDBOOL_H */
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