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usage map stuff

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This commit is contained in:
brianb
2002-12-20 06:17:41 +00:00
parent 0cf1a2242d
commit 66380f5958
3 changed files with 79 additions and 4 deletions
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16
src/libmdb/file.c
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@@ -48,6 +48,7 @@ int j,pos;
mdb->tab_num_cols_offset = 45;
mdb->tab_num_idxs_offset = 47;
mdb->tab_num_ridxs_offset = 51;
mdb->tab_usage_map_offset = 55;
mdb->tab_first_dpg_offset = 56;
mdb->tab_cols_start_offset = 63;
mdb->tab_ridx_entry_size = 12;
@@ -62,6 +63,7 @@ int j,pos;
mdb->tab_num_cols_offset = 25;
mdb->tab_num_idxs_offset = 27;
mdb->tab_num_ridxs_offset = 31;
mdb->tab_usage_map_offset = 35;
mdb->tab_first_dpg_offset = 36;
mdb->tab_cols_start_offset = 43;
mdb->tab_ridx_entry_size = 8;
@@ -185,18 +187,26 @@ unsigned char *c;
mdb->cur_pos+=3;
return l;
}
long mdb_get_int32(MdbHandle *mdb, int offset)
long _mdb_get_int32(unsigned char *buf, int offset)
{
long l;
unsigned char *c;
if (offset <0 || offset+4 > mdb->pg_size) return -1;
c = &mdb->pg_buf[offset];
c = &buf[offset];
l =c[3]; l<<=8;
l+=c[2]; l<<=8;
l+=c[1]; l<<=8;
l+=c[0];
return l;
}
long mdb_get_int32(MdbHandle *mdb, int offset)
{
long l;
if (offset <0 || offset+4 > mdb->pg_size) return -1;
l = _mdb_get_int32(mdb->pg_buf, offset);
mdb->cur_pos+=4;
return l;
}