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- #ifndef _IPXE_UUID_H
- #define _IPXE_UUID_H
-
- /** @file
- *
- * Universally unique IDs
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #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 const char * uuid_ntoa ( const union uuid *uuid );
-
- #endif /* _IPXE_UUID_H */
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