int mdb_read_row(MdbTableDef *table, unsigned int row)
{
MdbHandle *mdb = table->entry->mdb;
MdbColumn *col;
unsigned int i;
int rc;
int row_start;
size_t row_size;
int delflag, lookupflag;
MdbField fields[256];
int num_fields;
if (table->num_rows == 0)
return 0;
if (mdb_find_row(mdb, row, &row_start, &row_size)) {
fprintf(stderr, "warning: mdb_find_row failed.");
return 0;
}
delflag = lookupflag = 0;
if (row_start & 0x8000) lookupflag++;
if (row_start & 0x4000) delflag++;
row_start &= OFFSET_MASK; /* remove flags */
#if MDB_DEBUG
fprintf(stdout,"Row %d bytes %d to %d %s %s\n",
row, row_start, row_start + row_size - 1,
lookupflag ? "[lookup]" : "",
delflag ? "[delflag]" : "");
#endif
if (!table->noskip_del && delflag) {
return 0;
}
num_fields = mdb_crack_row(table, row_start, row_start + row_size - 1,
fields);
if (!mdb_test_sargs(table, fields, num_fields)) return 0;
#if MDB_DEBUG
fprintf(stdout,"sarg test passed row %d \n", row);
#endif
#if MDB_DEBUG
buffer_dump(mdb->pg_buf, row_start, row_size);
#endif
/* take advantage of mdb_crack_row() to clean up binding */
/* use num_cols instead of num_fields -- bsb 03/04/02 */
for (i = 0; i < table->num_cols; i++) {
col = g_ptr_array_index(table->columns,fields[i].colnum);
rc = _mdb_attempt_bind(mdb, col, fields[i].is_null,
fields[i].start, fields[i].siz);
}
return 1;
}
/**
* mdb_find_pg_row
* @mdb: Database file handle
* @pg_row: Lower byte contains the row number, the upper three contain page
* @buf: Pointer for returning a pointer to the page
* @off: Pointer for returning an offset to the row
* @len: Pointer for returning the length of the row
*
* Returns: 0 on success. 1 on failure.
*/
int mdb_find_pg_row(MdbHandle *mdb, int pg_row, void **buf, int *off, size_t *len)
{
unsigned int pg = pg_row >> 8;
unsigned int row = pg_row & 0xff;
if (mdb_read_alt_pg(mdb, pg) != mdb->fmt->pg_size)
return 1;
mdb_swap_pgbuf(mdb);
mdb_find_row(mdb, row, off, len);
mdb_swap_pgbuf(mdb);
*buf = mdb->alt_pg_buf;
return 0;
}
