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more gmdb2 work, reorged mdbhandle

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This commit is contained in:
brianb
2003-01-01 22:29:39 +00:00
parent 3c0d61076d
commit cc362c42e9
28 changed files with 893 additions and 181 deletions
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67
src/libmdb/table.c
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@@ -44,6 +44,7 @@ MdbTableDef *mdb_read_table(MdbCatalogEntry *entry)
{
MdbTableDef *table;
MdbHandle *mdb = entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
int len, i;
int rownum, row_start, row_end;
@@ -52,16 +53,16 @@ int rownum, row_start, row_end;
mdb_read_pg(mdb, entry->table_pg);
len = mdb_get_int16(mdb,8);
table->num_rows = mdb_get_int32(mdb, mdb->tab_num_rows_offset);
table->num_cols = mdb_get_int16(mdb, mdb->tab_num_cols_offset);
table->num_idxs = mdb_get_int32(mdb, mdb->tab_num_idxs_offset);
table->num_real_idxs = mdb_get_int32(mdb, mdb->tab_num_ridxs_offset);
table->num_rows = mdb_get_int32(mdb, fmt->tab_num_rows_offset);
table->num_cols = mdb_get_int16(mdb, fmt->tab_num_cols_offset);
table->num_idxs = mdb_get_int32(mdb, fmt->tab_num_idxs_offset);
table->num_real_idxs = mdb_get_int32(mdb, fmt->tab_num_ridxs_offset);
/* grab a copy of the usage map */
rownum = mdb->pg_buf[mdb->tab_usage_map_offset];
mdb_read_alt_pg(mdb, mdb_get_int24(mdb, mdb->tab_usage_map_offset + 1));
rownum = mdb->pg_buf[fmt->tab_usage_map_offset];
mdb_read_alt_pg(mdb, mdb_get_int24(mdb, fmt->tab_usage_map_offset + 1));
mdb_swap_pgbuf(mdb);
row_start = mdb_get_int16(mdb, (mdb->row_count_offset + 2) + (rownum*2));
row_start = mdb_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 = malloc(table->map_sz);
@@ -72,11 +73,11 @@ int rownum, row_start, row_end;
/* swap back */
mdb_swap_pgbuf(mdb);
#if MDB_DEBUG_USAGE
printf ("usage map found on page %ld start %d end %d\n", mdb_get_int24(mdb, mdb->tab_usage_map_offset + 1), row_start, row_end);
printf ("usage map found on page %ld start %d end %d\n", mdb_get_int24(mdb, fmt->tab_usage_map_offset + 1), row_start, row_end);
#endif
table->first_data_pg = mdb_get_int16(mdb, mdb->tab_first_dpg_offset);
table->first_data_pg = mdb_get_int16(mdb, fmt->tab_first_dpg_offset);
return table;
}
@@ -87,9 +88,9 @@ int rownum, row_start, row_end;
*/
static int read_pg_if(MdbHandle *mdb, int *cur_pos, int offset)
{
if (*cur_pos + offset >= mdb->pg_size) {
if (*cur_pos + offset >= mdb->fmt->pg_size) {
mdb_read_pg(mdb, mdb_get_int32(mdb,4));
*cur_pos = 8 - (mdb->pg_size - (*cur_pos));
*cur_pos = 8 - (mdb->fmt->pg_size - (*cur_pos));
return 1;
}
return 0;
@@ -98,6 +99,7 @@ static int read_pg_if(MdbHandle *mdb, int *cur_pos, int offset)
GPtrArray *mdb_read_columns(MdbTableDef *table)
{
MdbHandle *mdb = table->entry->mdb;
MdbFormatConstants *fmt = mdb->fmt;
MdbColumn col, *pcol;
int len, i,j;
unsigned char low_byte, high_byte;
@@ -109,8 +111,8 @@ GSList *slist = NULL;
table->columns = g_ptr_array_new();
cur_col = mdb->tab_cols_start_offset +
(table->num_real_idxs * mdb->tab_ridx_entry_size);
cur_col = fmt->tab_cols_start_offset +
(table->num_real_idxs * fmt->tab_ridx_entry_size);
/* new code based on patch submitted by Tim Nelson 2000.09.27 */
@@ -123,7 +125,7 @@ GSList *slist = NULL;
buffer_dump(mdb->pg_buf, cur_col ,cur_col + 18); */
#endif
memset(&col, 0, sizeof(col));
col.col_num = mdb->pg_buf[cur_col + mdb->col_num_offset];
col.col_num = mdb->pg_buf[cur_col + fmt->col_num_offset];
read_pg_if(mdb, &cur_col, 0);
col.col_type = mdb->pg_buf[cur_col];
@@ -134,20 +136,20 @@ GSList *slist = NULL;
}
read_pg_if(mdb, &cur_col, 13);
col.is_fixed = mdb->pg_buf[cur_col + mdb->col_fixed_offset] &
col.is_fixed = mdb->pg_buf[cur_col + fmt->col_fixed_offset] &
0x01 ? 1 : 0;
if (col.col_type != MDB_BOOL) {
read_pg_if(mdb, &cur_col, 17);
low_byte = mdb->pg_buf[cur_col + mdb->col_size_offset];
low_byte = mdb->pg_buf[cur_col + fmt->col_size_offset];
read_pg_if(mdb, &cur_col, 18);
high_byte = mdb->pg_buf[cur_col + mdb->col_size_offset + 1];
high_byte = mdb->pg_buf[cur_col + fmt->col_size_offset + 1];
col.col_size += high_byte * 256 + low_byte;
} else
col.col_size=0;
pcol = g_memdup(&col, sizeof(MdbColumn));
slist = g_slist_insert_sorted(slist,pcol,(GCompareFunc)mdb_col_comparer);
cur_col += mdb->tab_col_entry_size;
cur_col += fmt->tab_col_entry_size;
}
cur_name = cur_col;
@@ -163,12 +165,12 @@ GSList *slist = NULL;
read_pg_if(mdb, &cur_name, 0);
name_sz = mdb->pg_buf[cur_name];
if (mdb->jet_version==MDB_VER_JET4) {
if (IS_JET4(mdb)) {
/* FIX ME - for now just skip the high order byte */
cur_name += 2;
/* determine amount of name on this page */
len = ((cur_name + name_sz) > mdb->pg_size) ?
mdb->pg_size - cur_name :
len = ((cur_name + name_sz) > fmt->pg_size) ?
fmt->pg_size - cur_name :
name_sz;
/* strip high order (second) byte from unicode string */
@@ -179,7 +181,7 @@ GSList *slist = NULL;
if (len < name_sz) {
/* read the next pg */
mdb_read_pg(mdb, mdb_get_int32(mdb,4));
cur_name = 8 - (mdb->pg_size - cur_name);
cur_name = 8 - (fmt->pg_size - cur_name);
if (len % 2) cur_name++;
/* get the rest of the name */
for (j=0;j<len;j+=2) {
@@ -189,10 +191,10 @@ GSList *slist = NULL;
pcol->name[name_sz]='\0';
cur_name += name_sz;
} else if (mdb->jet_version==MDB_VER_JET3) {
} else if (IS_JET3(mdb)) {
/* determine amount of name on this page */
len = ((cur_name + name_sz) > mdb->pg_size) ?
mdb->pg_size - cur_name :
len = ((cur_name + name_sz) > fmt->pg_size) ?
fmt->pg_size - cur_name :
name_sz;
if (len) {
@@ -202,7 +204,7 @@ GSList *slist = NULL;
if (len < name_sz) {
/* read the next pg */
mdb_read_pg(mdb, mdb_get_int32(mdb,4));
cur_name = 8 - (mdb->pg_size - cur_name);
cur_name = 8 - (fmt->pg_size - cur_name);
/* get the rest of the name */
memcpy(&pcol->name[len], &mdb->pg_buf[cur_name], name_sz - len);
}
@@ -229,6 +231,7 @@ void mdb_table_dump(MdbCatalogEntry *entry)
{
MdbTableDef *table;
MdbColumn *col;
int coln;
MdbIndex *idx;
MdbHandle *mdb = entry->mdb;
int i,bitn;
@@ -258,12 +261,20 @@ int pgnum;
mdb_index_dump(table, idx);
}
if (table->usage_map) {
printf("pages reserved by this object\n",pgnum);
pgnum = _mdb_get_int32(table->usage_map,1);
/* the first 5 bytes of the usage map mean something */
coln = 0;
for (i=5;i<table->map_sz;i++) {
for (bitn=0;bitn<8;bitn++) {
if (table->usage_map[i] & 1 << bitn)
printf("page %ld is reserved by this object\n",pgnum);
if (table->usage_map[i] & 1 << bitn) {
coln++;
printf("%6ld ",pgnum);
if (coln==10) {
printf("\n");
coln = 0;
}
}
pgnum++;
}
}