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Fix type of get_seqno() from int to unsigned

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While there, document the seqno functions.
This commit is contained in:
Markus Armbruster 2008-05-16 07:33:20 +02:00 • committed by Markus Armbruster
parent e1283b118a
commit d3a2130b26
1 changed files with 19 additions and 2 deletions
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21
src/lib/common/file.c
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@ -50,7 +50,7 @@ static int ef_realloc_cache(struct empfile *, int);
static int fillcache(struct empfile *, int); static int fillcache(struct empfile *, int);
static int do_read(struct empfile *, void *, int, int); static int do_read(struct empfile *, void *, int, int);
static int do_write(struct empfile *, void *, int, int, time_t); static int do_write(struct empfile *, void *, int, int, time_t);
static int get_seqno(struct empfile *, int); static unsigned get_seqno(struct empfile *, int);
static void new_seqno(struct empfile *, void *); static void new_seqno(struct empfile *, void *);
static void do_blank(struct empfile *, void *, int, int); static void do_blank(struct empfile *, void *, int, int);
@ -458,6 +458,13 @@ ef_write(int type, int id, void *from)
return 1; return 1;
} }
/*
* Change element id.
* BUF is an element of table TYPE.
* ID is its new element ID.
* If table is EFF_TYPED, change id and sequence number stored in BUF.
* Else do nothing.
*/
void void
ef_set_uid(int type, void *buf, int uid) ef_set_uid(int type, void *buf, int uid)
{ {
@ -476,7 +483,12 @@ ef_set_uid(int type, void *buf, int uid)
elt->seqno = get_seqno(ep, uid); elt->seqno = get_seqno(ep, uid);
} }
static int /*
* Return sequence number of element ID in table EP.
* Return zero if table is not EFF_TYPED (it has no sequence number
* then).
*/
static unsigned
get_seqno(struct empfile *ep, int id) get_seqno(struct empfile *ep, int id)
{ {
struct emptypedstr *elt; struct emptypedstr *elt;
@ -498,6 +510,11 @@ get_seqno(struct empfile *ep, int id)
return elt->seqno; return elt->seqno;
} }
/*
* Increment sequence number in BUF, which is about to be written to EP.
* Do nothing if table is not EFF_TYPED (it has no sequence number
* then).
*/
static void static void
new_seqno(struct empfile *ep, void *buf) new_seqno(struct empfile *ep, void *buf)
{ {