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Add function mdb_find_pg_row

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whydoubt
2004-09-08 12:38:24 +00:00
parent d2208db027
commit 91d4a63fed
4 changed files with 134 additions and 185 deletions
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44
src/libmdb/table.c
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@@ -67,9 +67,8 @@ MdbTableDef *mdb_read_table(MdbCatalogEntry *entry)
MdbTableDef *table;
MdbHandle *mdb = entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
int len;
int rownum, row_start, row_end;
guint32 pg;
int len, row_start, pg_row;
char *buf;
table = mdb_alloc_tabledef(entry);
@@ -83,36 +82,21 @@ MdbTableDef *mdb_read_table(MdbCatalogEntry *entry)
table->num_cols = mdb_pg_get_int16(mdb, fmt->tab_num_cols_offset);
table->num_idxs = mdb_pg_get_int32(mdb, fmt->tab_num_idxs_offset);
table->num_real_idxs = mdb_pg_get_int32(mdb, fmt->tab_num_ridxs_offset);
/* grab a copy of the usage map */
rownum = mdb->pg_buf[fmt->tab_usage_map_offset];
pg = mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1);
mdb_read_alt_pg(mdb, pg);
mdb_swap_pgbuf(mdb);
row_start = mdb_pg_get_int16(mdb, (fmt->row_count_offset + 2) + (rownum*2));
row_end = mdb_find_end_of_row(mdb, rownum);
table->map_sz = row_end - row_start + 1;
table->usage_map = g_memdup(&mdb->pg_buf[row_start], table->map_sz);
pg_row = mdb_pg_get_int32(mdb, fmt->tab_usage_map_offset);
mdb_find_pg_row(mdb, pg_row, &buf, &row_start, &(table->map_sz));
table->usage_map = g_memdup(buf + row_start, table->map_sz);
if (mdb_get_option(MDB_DEBUG_USAGE))
buffer_dump(mdb->pg_buf, row_start, row_end);
/* swap back */
mdb_swap_pgbuf(mdb);
mdb_debug(MDB_DEBUG_USAGE,"usage map found on page %ld rownum %d start %d end %d", mdb_pg_get_int24(mdb, fmt->tab_usage_map_offset + 1), rownum, row_start, row_end);
buffer_dump(buf, row_start, row_start+table->map_sz-1);
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);
/* now grab the free space page map */
#if 1
//mdb_swap_pgbuf(mdb);
rownum = mdb->pg_buf[fmt->tab_free_map_offset];
mdb_read_alt_pg(mdb, mdb_pg_get_int24(mdb, fmt->tab_free_map_offset + 1));
mdb_swap_pgbuf(mdb);
row_start = mdb_pg_get_int16(mdb, (fmt->row_count_offset + 2) + (rownum*2));
row_end = mdb_find_end_of_row(mdb, rownum);
table->freemap_sz = row_end - row_start + 1;
table->free_usage_map = g_memdup(&mdb->pg_buf[row_start], table->freemap_sz);
mdb_swap_pgbuf(mdb);
#endif
mdb_debug(MDB_DEBUG_USAGE,"free map found on page %ld rownum %d start %d end %d\n", mdb_pg_get_int24(mdb, fmt->tab_free_map_offset + 1), rownum, row_start, row_end);
/* grab a copy of the free space page map */
pg_row = mdb_pg_get_int32(mdb, fmt->tab_free_map_offset);
mdb_find_pg_row(mdb, pg_row, &buf, &row_start, &(table->freemap_sz));
table->free_usage_map = g_memdup(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_pg_get_int16(mdb, fmt->tab_first_dpg_offset);