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Initial changes for Access 2000 files

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This commit is contained in:
brianb
2002-02-03 02:49:08 +00:00
parent ea8fd2a6ba
commit 1a96e241d0
19 changed files with 310 additions and 91 deletions
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122
src/libmdb/table.c
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@@ -19,6 +19,15 @@
#include "mdbtools.h"
static gint mdb_col_comparer(MdbColumn *a, MdbColumn *b)
{
if (a->col_num > b->col_num)
return 1;
else if (a->col_num < b->col_num)
return -1;
else
return 0;
}
unsigned char mdb_col_needs_size(int col_type)
{
@@ -40,11 +49,11 @@ int len, i;
mdb_read_pg(mdb, entry->table_pg);
len = mdb_get_int16(mdb,8);
table->num_rows = mdb_get_int32(mdb,12);
table->num_cols = mdb_get_int16(mdb,25);
table->num_idxs = mdb_get_int32(mdb,27);
table->num_real_idxs = mdb_get_int32(mdb,31);
table->first_data_pg = mdb_get_int16(mdb,36);
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->first_data_pg = mdb_get_int16(mdb, mdb->tab_first_dpg_offset);
return table;
}
@@ -67,39 +76,44 @@ GPtrArray *mdb_read_columns(MdbTableDef *table)
{
MdbHandle *mdb = table->entry->mdb;
MdbColumn col, *pcol;
int len, i;
int len, i,j;
unsigned char low_byte, high_byte;
int cur_col, cur_name;
int col_type, col_size;
char name[MDB_MAX_OBJ_NAME+1];
int name_sz;
int name_sz, col_num;
GSList *slist = NULL;
table->columns = g_ptr_array_new();
cur_col = 43 + (table->num_real_idxs * 8);
cur_col = mdb->tab_cols_start_offset +
(table->num_real_idxs * mdb->tab_ridx_entry_size);
/* new code based on patch submitted by Tim Nelson 2000.09.27 */
/*
** column attributes
*/
for (i=0; i<table->num_cols;i++) {
memset(&col,'\0', sizeof(MdbColumn));
for (i=0;i<table->num_cols;i++) {
memset(&col, 0, sizeof(col));
col.col_num = mdb->pg_buf[cur_col + mdb->col_num_offset];
read_pg_if(mdb, &cur_col, 0);
col.col_type = mdb->pg_buf[cur_col];
read_pg_if(mdb, &cur_col, 13);
col.is_fixed = mdb->pg_buf[cur_col+13] & 0x01 ? 1 : 0;
col.is_fixed = mdb->pg_buf[cur_col + mdb->col_fixed_offset] &
0x01 ? 1 : 0;
read_pg_if(mdb, &cur_col, 17);
low_byte = mdb->pg_buf[cur_col+16];
low_byte = mdb->pg_buf[cur_col + mdb->col_size_offset];
read_pg_if(mdb, &cur_col, 18);
high_byte = mdb->pg_buf[cur_col+17];
high_byte = mdb->pg_buf[cur_col + mdb->col_size_offset + 1];
col.col_size += high_byte * 256 + low_byte;
mdb_append_column(table->columns, &col);
cur_col += 18;
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_name = cur_col;
@@ -109,32 +123,70 @@ int name_sz;
*/
for (i=0;i<table->num_cols;i++) {
/* fetch the column */
pcol = g_ptr_array_index (table->columns, i);
pcol = g_slist_nth_data (slist, i);
/* we have reached the end of page */
read_pg_if(mdb, &cur_name, 0);
name_sz = mdb->pg_buf[cur_name];
/* determine amount of name on this page */
len = ((cur_name + name_sz) > mdb->pg_size) ?
mdb->pg_size - cur_name :
name_sz;
if (mdb->jet_version==MDB_VER_JET4) {
/* 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 :
name_sz;
/* strip high order (second) byte from unicode string */
for (j=0;j<len;j+=2) {
pcol->name[j/2] = mdb->pg_buf[cur_name + j];
}
/* name wrapped over page */
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);
if (len % 2) cur_name++;
/* get the rest of the name */
for (j=0;j<len;j+=2) {
}
memcpy(&pcol->name[len], &mdb->pg_buf[cur_name], name_sz - len);
}
pcol->name[name_sz]='\0';
if (len) {
memcpy(pcol->name, &mdb->pg_buf[cur_name+1], len);
}
/* name wrapped over page */
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);
/* get the rest of the name */
memcpy(&pcol->name[len], &mdb->pg_buf[cur_name], name_sz - len);
}
pcol->name[name_sz]='\0';
cur_name += name_sz;
} else if (mdb->jet_version==MDB_VER_JET3) {
/* determine amount of name on this page */
len = ((cur_name + name_sz) > mdb->pg_size) ?
mdb->pg_size - cur_name :
name_sz;
if (len) {
memcpy(pcol->name, &mdb->pg_buf[cur_name+1], len);
}
/* name wrapped over page */
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);
/* get the rest of the name */
memcpy(&pcol->name[len], &mdb->pg_buf[cur_name], name_sz - len);
}
pcol->name[name_sz]='\0';
cur_name += name_sz + 1;
cur_name += name_sz + 1;
} else {
fprintf(stderr,"Unknown MDB version\n");
}
}
/* turn this list into an array */
for (i=0;i<table->num_cols;i++) {
pcol = g_slist_nth_data (slist, i);
g_ptr_array_add(table->columns, pcol);
}
g_slist_free(slist);
table->index_start = cur_name;
return table->columns;
}