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#ifndef _IPXE_UUID_H
#define _IPXE_UUID_H
/** @file
*
* Universally unique IDs
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <byteswap.h>
/** A universally unique ID */
union uuid {
/** Canonical form (00000000-0000-0000-0000-000000000000) */
struct {
/** 8 hex digits, big-endian */
uint32_t a;
/** 2 hex digits, big-endian */
uint16_t b;
/** 2 hex digits, big-endian */
uint16_t c;
/** 2 hex digits, big-endian */
uint16_t d;
/** 12 hex digits, big-endian */
uint8_t e[6];
} canonical;
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 */
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