63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* SPDX-License-Identifier: Intel */
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/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __SIGNATURES_H__
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#define __SIGNATURES_H__
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/**
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* Returns a 16-bit signature built from 2 ASCII characters.
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*
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* This macro returns a 16-bit value built from the two ASCII characters
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* specified by A and B.
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*
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* @A: The first ASCII character.
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* @B: The second ASCII character.
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*
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* @return: A 16-bit value built from the two ASCII characters specified by
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* A and B.
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*/
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#define SIGNATURE_16(A, B) ((A) | (B << 8))
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/**
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* Returns a 32-bit signature built from 4 ASCII characters.
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*
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* This macro returns a 32-bit value built from the four ASCII characters
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* specified by A, B, C, and D.
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*
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* @A: The first ASCII character.
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* @B: The second ASCII character.
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* @C: The third ASCII character.
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* @D: The fourth ASCII character.
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*
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* @return: A 32-bit value built from the two ASCII characters specified by
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* A, B, C and D.
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*/
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#define SIGNATURE_32(A, B, C, D) \
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(SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16))
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/**
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* Returns a 64-bit signature built from 8 ASCII characters.
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*
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* This macro returns a 64-bit value built from the eight ASCII characters
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* specified by A, B, C, D, E, F, G,and H.
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*
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* @A: The first ASCII character.
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* @B: The second ASCII character.
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* @C: The third ASCII character.
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* @D: The fourth ASCII character.
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* @E: The fifth ASCII character.
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* @F: The sixth ASCII character.
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* @G: The seventh ASCII character.
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* @H: The eighth ASCII character.
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*
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* @return: A 64-bit value built from the two ASCII characters specified by
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* A, B, C, D, E, F, G and H.
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*/
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#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
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(SIGNATURE_32(A, B, C, D) | ((u64)(SIGNATURE_32(E, F, G, H)) << 32))
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#endif /* __SIGNATURES_H__ */
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