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[uuid] Abstract UUID mangling code out to a separate uuid_mangle() function

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-03-20 15:06:40 +00:00
parent a9b63ecda5
commit d938e50136
3 changed files with 21 additions and 7 deletions
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19
src/include/ipxe/uuid.h
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@@ -9,6 +9,7 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <byteswap.h>
/** A universally unique ID */
union uuid {
@@ -28,6 +29,24 @@ union uuid {
uint8_t raw[16];
};
/**
* Change UUID endianness
*
* @v uuid UUID
*
* RFC4122 defines UUIDs as being encoded in network byte order, but
* leaves some wriggle room for "explicit application or presentation
* protocol specification to the contrary". PXE, EFI and SMBIOS
* (versions 2.6 and above) treat the first three fields as being
* little-endian.
*/
static inline void uuid_mangle ( union uuid *uuid ) {
__bswap_32s ( &uuid->canonical.a );
__bswap_16s ( &uuid->canonical.b );
__bswap_16s ( &uuid->canonical.c );
}
extern char * uuid_ntoa ( const union uuid *uuid );
#endif /* _IPXE_UUID_H */