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Add a couple more of the big/little-endian conversion routines and make

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them visible from userland, if need be.

I wish that the C language contained this as part of struct definintions,
but failing that, I would settle for an agreed upon set of functions for
packing/unpacking integers in various sizes from byte-streams which may
have unfriendly alignment.

This really belongs in <sys/endian.h> I guess.
This commit is contained in:
Poul-Henning Kamp 2002-09-13 10:33:10 +00:00
parent 2dfbcdd46d
commit 85b62edb84
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103279
2 changed files with 25 additions and 6 deletions
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15
sys/geom/geom.h
View File

@ -178,12 +178,6 @@ void g_trace(int level, char *, ...);
# define G_T_BIO 2
# define G_T_ACCESS 4
/* geom_enc.c */
uint32_t g_dec_be2(u_char *p);
uint32_t g_dec_be4(u_char *p);
uint32_t g_dec_le2(u_char *p);
uint32_t g_dec_le4(u_char *p);
void g_enc_le4(u_char *p, uint32_t u);
/* geom_event.c */
void g_orphan_provider(struct g_provider *pp, int error);
@ -298,4 +292,13 @@ extern struct sx topology_lock;
#define GEOMGETCONF _IOWR('G', 0, struct sbuf)
/* geom_enc.c */
uint32_t g_dec_be2(u_char *p);
uint32_t g_dec_be4(u_char *p);
uint32_t g_dec_le2(u_char *p);
uint32_t g_dec_le4(u_char *p);
uint64_t g_dec_le8(u_char *p);
void g_enc_le4(u_char *p, uint32_t u);
void g_enc_le8(u_char *p, uint64_t u);
#endif /* _GEOM_GEOM_H_ */

16
sys/geom/geom_enc.c
View File

@ -101,3 +101,19 @@ g_enc_le4(u_char *p, uint32_t u)
p[3] = (u >> 24) & 0xff;
}
uint64_t
g_dec_le8(u_char *p)
{
return(g_dec_le4(p) | ((uint64_t)(g_dec_le4(p + 4)) << 32));
}
void
g_enc_le8(u_char *p, uint64_t u)
{
g_enc_le4(p, u);
g_enc_le4(p + 4, u >> 32);
}