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add function header for SIGNATURE_XX, according to MDE Spec, 0.61e-7 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6428 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff 2008-11-07 09:05:44 +00:00
parent 378871863f
commit a7cc3d261c
1 changed files with 39 additions and 3 deletions
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42
MdePkg/Include/Base.h
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@ -281,11 +281,47 @@ typedef INTN RETURN_STATUS;
#define RETURN_WARN_WRITE_FAILURE ENCODE_WARNING (3)
#define RETURN_WARN_BUFFER_TOO_SMALL ENCODE_WARNING (4)
//
// Define macros to build data structure signatures from characters.
//
/**
Returns a 16-bit signature built from 2 ASCII characters.
@param A The first ASCII character.
@param B The second ASCII character.
@return A 16-bit value built from the two ASCII characters specified by A and B.
**/
#define SIGNATURE_16(A, B) ((A) | (B << 8))
/**
Returns a 32-bit signature built from 4 ASCII characters.
@param A The first ASCII character.
@param B The second ASCII character.
@param C The third ASCII character.
@param D The fourth ASCII character.
@return A 32-bit value built from the two ASCII characters specified by A, B,
C and D.
**/
#define SIGNATURE_32(A, B, C, D) (SIGNATURE_16 (A, B) | (SIGNATURE_16 (C, D) << 16))
/**
Returns a 64-bit signature built from 8 ASCII characters.
@param A The first ASCII character.
@param B The second ASCII character.
@param C The third ASCII character.
@param D The fourth ASCII character.
@param E The fifth ASCII character.
@param F The sixth ASCII character.
@param G The seventh ASCII character.
@param H The eighth ASCII character.
@return A 64-bit value built from the two ASCII characters specified by A, B,
C, D, E, F, G and H.
**/
#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
(SIGNATURE_32 (A, B, C, D) | ((UINT64) (SIGNATURE_32 (E, F, G, H)) << 32))