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dbwrap: Add dbwrap_merge_dbufs

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Transitional code to implement dbwrap_record_storev

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Volker Lendecke 2016-09-12 17:11:09 +02:00 committed by Ralph Boehme
parent cfb6568408
commit f0598e9853
2 changed files with 51 additions and 0 deletions
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48
lib/dbwrap/dbwrap.c
View File

@ -556,3 +556,51 @@ const char *dbwrap_name(struct db_context *db)
{
return db->name;
}
static ssize_t tdb_data_buf(const TDB_DATA *dbufs, int num_dbufs,
uint8_t *buf, size_t buflen)
{
size_t needed = 0;
uint8_t *p = buf;
int i;
for (i=0; i<num_dbufs; i++) {
size_t thislen = dbufs[i].dsize;
size_t tmp;
tmp = needed + thislen;
if (tmp < needed) {
/* wrap */
return -1;
}
needed = tmp;
if (needed <= buflen) {
memcpy(p, dbufs[i].dptr, thislen);
p += thislen;
}
}
return needed;
}
TDB_DATA dbwrap_merge_dbufs(TALLOC_CTX *mem_ctx,
const TDB_DATA *dbufs, int num_dbufs)
{
ssize_t len = tdb_data_buf(dbufs, num_dbufs, NULL, 0);
uint8_t *buf;
if (len == -1) {
return (TDB_DATA) {0};
}
buf = talloc_array(mem_ctx, uint8_t, len);
if (buf == NULL) {
return (TDB_DATA) {0};
}
tdb_data_buf(dbufs, num_dbufs, buf, len);
return (TDB_DATA) { .dptr = buf, .dsize = len };
}

3
lib/dbwrap/dbwrap.h
View File

@ -216,6 +216,9 @@ NTSTATUS dbwrap_parse_marshall_buf(const uint8_t *buf, size_t buflen,
NTSTATUS dbwrap_unmarshall(struct db_context *db, const uint8_t *buf,
size_t buflen);
TDB_DATA dbwrap_merge_dbufs(TALLOC_CTX *mem_ctx,
const TDB_DATA *dbufs, int num_dbufs);
/**
* This opens a tdb file