/*
* ole_ptr should point to the original blob value of the field.
* If omited, there will be no multi-page check to that the caller is
* responsible for not calling this function. Then, it doesn't have to
* preserve the original value.
*/
size_t
mdb_ole_read_next(MdbHandle *mdb, MdbColumn *col, void *ole_ptr)
{
guint32 ole_len;
void *buf;
int row_start;
size_t len;
if (ole_ptr) {
ole_len = mdb_get_int32(ole_ptr, 0);
mdb_debug(MDB_DEBUG_OLE,"ole len = %d ole flags = %02x",
ole_len & 0x00ffffff, ole_len >> 24);
if ((ole_len & 0x80000000)
|| (ole_len & 0x40000000))
/* inline or single-page fields don't have a next */
return 0;
}
mdb_debug(MDB_DEBUG_OLE, "pg_row %d", col->cur_blob_pg_row);
if (!col->cur_blob_pg_row)
return 0; /* we are done */
if (mdb_find_pg_row(mdb, col->cur_blob_pg_row,
&buf, &row_start, &len)) {
return 0;
}
mdb_debug(MDB_DEBUG_OLE,"start %d len %d", row_start, len);
if (col->bind_ptr)
memcpy(col->bind_ptr, buf + row_start + 4, len - 4);
col->cur_blob_pg_row = mdb_get_int32(buf, row_start);
return len - 4;
}
size_t
mdb_ole_read_next(MdbHandle *mdb, MdbColumn *col, void *ole_ptr)
{
guint32 ole_len;
void *buf;
int row_start;
size_t len;
ole_len = mdb_get_int32(ole_ptr, 0);
if ((ole_len & 0x80000000)
|| (ole_len & 0x40000000)) {
/* inline or single-page fields don't have a next */
return 0;
} else {
if (mdb_find_pg_row(mdb, col->cur_blob_pg_row,
&buf, &row_start, &len)) {
return 0;
}
if (col->bind_ptr)
memcpy(col->bind_ptr, buf + row_start + 4, len - 4);
col->cur_blob_pg_row = mdb_get_int32(buf, row_start);
return len;
}
return 0;
}
MdbTableDef *mdb_read_table(MdbCatalogEntry *entry)
{
MdbTableDef *table;
MdbHandle *mdb = entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
int len, row_start, pg_row;
void *buf, *pg_buf = mdb->pg_buf;
mdb_read_pg(mdb, entry->table_pg);
if (mdb_get_byte(pg_buf, 0) != 0x02) /* not a valid table def page */
return NULL;
table = mdb_alloc_tabledef(entry);
len = mdb_get_int16(pg_buf, 8);
table->num_rows = mdb_get_int32(pg_buf, fmt->tab_num_rows_offset);
table->num_var_cols = mdb_get_int16(pg_buf, fmt->tab_num_cols_offset-2);
table->num_cols = mdb_get_int16(pg_buf, fmt->tab_num_cols_offset);
table->num_idxs = mdb_get_int32(pg_buf, fmt->tab_num_idxs_offset);
table->num_real_idxs = mdb_get_int32(pg_buf, fmt->tab_num_ridxs_offset);
/* grab a copy of the usage map */
pg_row = mdb_get_int32(pg_buf, fmt->tab_usage_map_offset);
mdb_find_pg_row(mdb, pg_row, &buf, &row_start, &(table->map_sz));
table->usage_map = g_memdup((char*)buf + row_start, table->map_sz);
if (mdb_get_option(MDB_DEBUG_USAGE))
buffer_dump(buf, row_start, table->map_sz);
mdb_debug(MDB_DEBUG_USAGE,"usage map found on page %ld row %d start %d len %d",
pg_row >> 8, pg_row & 0xff, row_start, table->map_sz);
/* grab a copy of the free space page map */
pg_row = mdb_get_int32(pg_buf, fmt->tab_free_map_offset);
mdb_find_pg_row(mdb, pg_row, &buf, &row_start, &(table->freemap_sz));
table->free_usage_map = g_memdup((char*)buf + row_start, table->freemap_sz);
mdb_debug(MDB_DEBUG_USAGE,"free map found on page %ld row %d start %d len %d\n",
pg_row >> 8, pg_row & 0xff, row_start, table->freemap_sz);
table->first_data_pg = mdb_get_int16(pg_buf, fmt->tab_first_dpg_offset);
return table;
}
size_t
mdb_ole_read(MdbHandle *mdb, MdbColumn *col, void *ole_ptr, int chunk_size)
{
guint32 ole_len;
void *buf;
int row_start;
size_t len;
ole_len = mdb_get_int32(ole_ptr, 0);
mdb_debug(MDB_DEBUG_OLE,"ole len = %d ole flags = %02x",
ole_len & 0x00ffffff, ole_len >> 24);
col->chunk_size = chunk_size;
if (ole_len & 0x80000000) {
/* inline ole field, if we can satisfy it, then do it */
len = col->cur_value_len - MDB_MEMO_OVERHEAD;
if ((size_t)chunk_size >= len) {
if (col->bind_ptr)
memcpy(col->bind_ptr,
&mdb->pg_buf[col->cur_value_start +
MDB_MEMO_OVERHEAD],
len);
return len;
} else {
return 0;
}
} else if (ole_len & 0x40000000) {
col->cur_blob_pg_row = mdb_get_int32(ole_ptr, 4);
mdb_debug(MDB_DEBUG_OLE,"ole row = %d ole pg = %ld",
col->cur_blob_pg_row & 0xff,
col->cur_blob_pg_row >> 8);
if (mdb_find_pg_row(mdb, col->cur_blob_pg_row,
&buf, &row_start, &len)) {
return 0;
}
mdb_debug(MDB_DEBUG_OLE,"start %d len %d", row_start, len);
if (col->bind_ptr) {
memcpy(col->bind_ptr, (char*)buf + row_start, len);
if (mdb_get_option(MDB_DEBUG_OLE))
buffer_dump(col->bind_ptr, 0, 16);
}
return len;
} else if ((ole_len & 0xff000000) == 0) {