/*
* __curlog_kv --
* Set the key and value of the log cursor to return to the user.
*/
static int
__curlog_kv(WT_SESSION_IMPL *session, WT_CURSOR *cursor)
{
WT_CURSOR_LOG *cl;
WT_DECL_RET;
uint32_t fileid, key_count, opsize, optype, raw;
cl = (WT_CURSOR_LOG *)cursor;
/* Temporarily turn off raw so we can do direct cursor operations. */
raw = F_MASK(cursor, WT_CURSTD_RAW);
F_CLR(cursor, WT_CURSTD_RAW);
/*
* If it is a commit and we have stepped over the header, peek to get
* the size and optype and read out any key/value from this operation.
*/
if ((key_count = cl->step_count++) > 0) {
WT_ERR(__wt_logop_read(session,
&cl->stepp, cl->stepp_end, &optype, &opsize));
WT_ERR(__curlog_op_read(session, cl, optype, opsize, &fileid));
/* Position on the beginning of the next record part. */
cl->stepp += opsize;
} else {
optype = WT_LOGOP_INVALID;
fileid = 0;
cl->opkey->data = NULL;
cl->opkey->size = 0;
/*
* Non-commit records we want to return the record without the
* header and the adjusted size. Add one to skip over the type
* which is normally consumed by __wt_logrec_read.
*/
cl->opvalue->data = WT_LOG_SKIP_HEADER(cl->logrec->data) + 1;
cl->opvalue->size = WT_LOG_REC_SIZE(cl->logrec->size) - 1;
}
/*
* The log cursor sets the LSN and step count as the cursor key and
* and log record related data in the value. The data in the value
* contains any operation key/value that was in the log record.
*/
__wt_cursor_set_key(cursor, cl->cur_lsn->l.file, cl->cur_lsn->l.offset,
key_count);
__wt_cursor_set_value(cursor, cl->txnid, cl->rectype, optype, fileid,
cl->opkey, cl->opvalue);
err: F_SET(cursor, raw);
return (ret);
}
/*
* __curlog_kv --
* Set the key and value of the log cursor to return to the user.
*/
static int
__curlog_kv(WT_SESSION_IMPL *session, WT_CURSOR *cursor)
{
WT_CURSOR_LOG *cl;
WT_ITEM item;
uint32_t fileid, key_count, opsize, optype;
cl = (WT_CURSOR_LOG *)cursor;
/*
* If it is a commit and we have stepped over the header, peek to get
* the size and optype and read out any key/value from this operation.
*/
if ((key_count = cl->step_count++) > 0) {
WT_RET(__wt_logop_read(session,
&cl->stepp, cl->stepp_end, &optype, &opsize));
WT_RET(__curlog_op_read(session, cl, optype, opsize, &fileid));
/* Position on the beginning of the next record part. */
cl->stepp += opsize;
} else {
optype = WT_LOGOP_INVALID;
fileid = 0;
cl->opkey->data = NULL;
cl->opkey->size = 0;
/*
* Non-commit records we want to return the record without the
* header and the adjusted size. Add one to skip over the type
* which is normally consumed by __wt_logrec_read.
*/
cl->opvalue->data = WT_LOG_SKIP_HEADER(cl->logrec->data) + 1;
cl->opvalue->size = WT_LOG_REC_SIZE(cl->logrec->size) - 1;
}
/*
* The log cursor sets the LSN and step count as the cursor key and
* and log record related data in the value. The data in the value
* contains any operation key/value that was in the log record.
* For the special case that the caller needs the result in raw form,
* we create packed versions of the key/value.
*/
if (FLD_ISSET(cursor->flags, WT_CURSTD_RAW)) {
memset(&item, 0, sizeof(item));
WT_RET(wiredtiger_struct_size((WT_SESSION *)session,
&item.size, WT_LOGC_KEY_FORMAT, cl->cur_lsn->l.file,
cl->cur_lsn->l.offset, key_count));
WT_RET(__wt_realloc(session, NULL, item.size, &cl->packed_key));
item.data = cl->packed_key;
WT_RET(wiredtiger_struct_pack((WT_SESSION *)session,
cl->packed_key, item.size, WT_LOGC_KEY_FORMAT,
cl->cur_lsn->l.file, cl->cur_lsn->l.offset, key_count));
__wt_cursor_set_key(cursor, &item);
WT_RET(wiredtiger_struct_size((WT_SESSION *)session,
&item.size, WT_LOGC_VALUE_FORMAT, cl->txnid, cl->rectype,
optype, fileid, cl->opkey, cl->opvalue));
WT_RET(__wt_realloc(session, NULL, item.size,
&cl->packed_value));
item.data = cl->packed_value;
WT_RET(wiredtiger_struct_pack((WT_SESSION *)session,
cl->packed_value, item.size, WT_LOGC_VALUE_FORMAT,
cl->txnid, cl->rectype, optype, fileid, cl->opkey,
cl->opvalue));
__wt_cursor_set_value(cursor, &item);
} else {
__wt_cursor_set_key(cursor, cl->cur_lsn->l.file,
cl->cur_lsn->l.offset, key_count);
__wt_cursor_set_value(cursor, cl->txnid, cl->rectype, optype,
fileid, cl->opkey, cl->opvalue);
}
return (0);
}
