lsm/mdbtools
1
0
Fork 0
mirror of https://github.com/mdbtools/mdbtools.git synced 2026-03-10 00:20:54 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

odbc inst fixes.

Browse Source 
deleted column fix for jet4 fixed columns
This commit is contained in:
brianb
2004-03-04 21:25:09 +00:00
parent fb02e23b6b
commit c5f4a8bb04
14 changed files with 220 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/libmdb/data.c
View File

@@ -176,7 +176,7 @@ int ret;
mdb_col_to_string(mdb, mdb->pg_buf, start, col->col_type, len));
}
} else {
strcpy(col->bind_ptr, "");
strcpy(col->bind_ptr, "");
}
ret = strlen(col->bind_ptr);
if (col->len_ptr) {
@@ -241,7 +241,8 @@ int mdb_read_row(MdbTableDef *table, int row)
#if 1
/* take advantage of mdb_crack_row() to clean up binding */
for (i = 0; i < num_fields; i++) {
/* use num_cols instead of num_fields -- bsb 03/04/02 */
for (i = 0; i < table->num_cols; i++) {
col = g_ptr_array_index(table->columns,fields[i].colnum);
if (fields[i].is_fixed) {
rc = _mdb_attempt_bind(mdb, col,

7
src/libmdb/file.c
View File

@@ -40,13 +40,16 @@ typedef struct {
guint16 col_num_offset;
guint16 tab_col_entry_size;
guint16 tab_free_map_offset;
guint16 tab_col_offset_var;
guint16 tab_col_offset_fixed;
guint16 tab_row_col_num_offset;
} MdbFormatConstants;
*/
MdbFormatConstants MdbJet4Constants = {
4096, 0x0c, 16, 45, 47, 51, 55, 56, 63, 12, 15, 23, 5, 25, 59
4096, 0x0c, 16, 45, 47, 51, 55, 56, 63, 12, 15, 23, 5, 25, 59, 7, 21, 9
};
MdbFormatConstants MdbJet3Constants = {
2048, 0x08, 12, 25, 27, 31, 35, 36, 43, 8, 13, 16, 1, 18, 39
2048, 0x08, 12, 25, 27, 31, 35, 36, 43, 8, 13, 16, 1, 18, 39, 3, 14, 5 /* not sure on 5, need to check */
};
static size_t _mdb_read_pg(MdbHandle *mdb, unsigned char *pg_buf, unsigned long pg);

4
src/libmdb/options.c
View File

@@ -65,9 +65,13 @@ load_options()
if (!strcmp(opt, "debug_write")) opts |= MDB_DEBUG_WRITE;
if (!strcmp(opt, "debug_usage")) opts |= MDB_DEBUG_USAGE;
if (!strcmp(opt, "debug_ole")) opts |= MDB_DEBUG_OLE;
if (!strcmp(opt, "debug_row")) opts |= MDB_DEBUG_ROW;
if (!strcmp(opt, "debug_all")) {
opts |= MDB_DEBUG_LIKE;
opts |= MDB_DEBUG_WRITE;
opts |= MDB_DEBUG_USAGE;
opts |= MDB_DEBUG_OLE;
opts |= MDB_DEBUG_ROW;
}
opt = strtok(NULL,":");
} while (opt);

26
src/libmdb/table.c
View File

@@ -189,9 +189,24 @@ GPtrArray *mdb_read_columns(MdbTableDef *table)
read_pg_if(mdb, &cur_col, 0);
col.col_type = mdb->pg_buf[cur_col];
read_pg_if(mdb, &cur_col, fmt->col_num_offset); // col_num_offset == 1 or 5
read_pg_if(mdb, &cur_col, cur_col + fmt->col_num_offset); // col_num_offset == 1 or 5
col.col_num = mdb->pg_buf[cur_col + fmt->col_num_offset];
//fprintf(stdout,"----- column %d -----\n",col.col_num);
read_pg_if(mdb, &cur_col, fmt->tab_col_offset_var); // col_var == 3 or 7
low_byte = mdb->pg_buf[cur_col + fmt->tab_col_offset_var];
read_pg_if(mdb, &cur_col, fmt->tab_col_offset_var + 1);
high_byte = mdb->pg_buf[cur_col + fmt->tab_col_offset_var + 1];
col.var_col_num = high_byte * 256 + low_byte;
//fprintf(stdout,"var column pos %d\n",col.var_col_num);
read_pg_if(mdb, &cur_col, fmt->tab_row_col_num_offset); // col_var == 5 or 9
low_byte = mdb->pg_buf[cur_col + fmt->tab_row_col_num_offset];
read_pg_if(mdb, &cur_col, fmt->tab_row_col_num_offset + 1);
high_byte = mdb->pg_buf[cur_col + fmt->tab_row_col_num_offset + 1];
col.row_col_num = high_byte * 256 + low_byte;
//fprintf(stdout,"row column num %d\n",col.row_col_num);
/* FIXME: can this be right in Jet3 and Jet4? */
if (col.col_type == MDB_NUMERIC) {
read_pg_if(mdb, &cur_col, 11);
@@ -203,6 +218,15 @@ GPtrArray *mdb_read_columns(MdbTableDef *table)
read_pg_if(mdb, &cur_col, fmt->col_fixed_offset); // col_fixed_offset == 13 or 15
col.is_fixed = mdb->pg_buf[cur_col + fmt->col_fixed_offset] &
0x01 ? 1 : 0;
read_pg_if(mdb, &cur_col, fmt->tab_col_offset_fixed); // col_fixed_offset == 13 or 15
low_byte = mdb->pg_buf[cur_col + fmt->tab_col_offset_fixed];
read_pg_if(mdb, &cur_col, fmt->tab_col_offset_fixed + 1);
high_byte = mdb->pg_buf[cur_col + fmt->tab_col_offset_fixed + 1];
col.fixed_offset = high_byte * 256 + low_byte;
//fprintf(stdout,"fixed column offset %d\n",col.fixed_offset);
//fprintf(stdout,"col type %s\n",col.is_fixed ? "fixed" : "variable");
if (col.col_type != MDB_BOOL) {
read_pg_if(mdb, &cur_col, fmt->col_size_offset); // col_size_offset == 16 or 23
low_byte = mdb->pg_buf[cur_col + fmt->col_size_offset];

69
src/libmdb/write.c
View File

@@ -87,20 +87,41 @@ MdbIndex *idx;
int
mdb_crack_row4(MdbTableDef *table, int row_start, int row_end, MdbField *fields)
{
MdbCatalogEntry *entry = table->entry;
MdbHandle *mdb = entry->mdb;
MdbColumn *col;
int i, j;
int var_cols = 0, fixed_cols = 0, num_cols, totcols = 0;
int var_cols_found, fixed_cols_found, var_entry_pos;
int col_start, next_col;
unsigned char *nullmask;
int bitmask_sz;
int byte_num, bit_num;
int eod, len; /* end of data */
MdbCatalogEntry *entry = table->entry;
MdbHandle *mdb = entry->mdb;
MdbColumn *col;
int i, j;
int var_cols = 0, fixed_cols = 0, num_cols, totcols = 0;
int var_cols_found, fixed_cols_found, var_entry_pos;
int col_start, next_col;
unsigned char *nullmask;
int bitmask_sz;
int byte_num, bit_num;
int eod, len; /* end of data */
int real_offset = 0;
int row_pos;
if (mdb_get_option(MDB_DEBUG_ROW)) {
buffer_dump(mdb->pg_buf, row_start, row_end+1);
}
num_cols = mdb_pg_get_int16(mdb, row_start);
/* compute nulls first to help with fixed colnum's */
bitmask_sz = (num_cols - 1) / 8 + 1;
nullmask = &mdb->pg_buf[row_end - bitmask_sz + 1];
for (i=0;i<table->num_cols;i++) {
col = g_ptr_array_index (table->columns, i);
row_pos = col->row_col_num;
byte_num = row_pos / 8;
bit_num = row_pos % 8;
/* logic on nulls is reverse, 1 is not null, 0 is null */
fields[i].is_null = nullmask[byte_num] & 1 << bit_num ? 0 : 1;
//printf("col %d is %s\n", i, fields[i].is_null ? "null" : "not null");
}
/* fields are ordered fixed then variable */
for (i = 0; i < table->num_cols; i++) {
col = g_ptr_array_index (table->columns, i);
if (mdb_is_fixed_col(col)) {
@@ -119,17 +140,6 @@ int eod, len; /* end of data */
}
}
bitmask_sz = (num_cols - 1) / 8 + 1;
nullmask = &mdb->pg_buf[row_end - bitmask_sz + 1];
for (i=0;i<num_cols;i++) {
byte_num = i / 8;
bit_num = i % 8;
/* logic on nulls is reverse, 1 is not null, 0 is null */
fields[i].is_null = nullmask[byte_num] & 1 << bit_num ? 0 : 1;
//printf("col %d is %s\n", i, fields[i].is_null ? "null" : "not null");
}
/* find the end of data pointer */
eod = mdb_pg_get_int16(mdb, row_end - 3 - var_cols*2 - bitmask_sz);
@@ -140,7 +150,18 @@ int eod, len; /* end of data */
var_cols_found = 0;
totcols = 0;
for (j=0;j<table->num_cols;j++) {
col = g_ptr_array_index(table->columns,j);
if (mdb_is_fixed_col(col) && fixed_cols_found <= fixed_cols) {
real_offset += col->col_size;
fields[totcols].start = row_start + col->fixed_offset + 2;
fields[totcols++].value = &mdb->pg_buf[row_start + col->fixed_offset + 2];
fixed_cols_found++;
}
}
/* loop through fixed columns and add values to fields[] */
/*
for (j=0;j<table->num_cols;j++) {
col = g_ptr_array_index(table->columns,j);
if (mdb_is_fixed_col(col) && ++fixed_cols_found <= fixed_cols) {
@@ -150,6 +171,10 @@ int eod, len; /* end of data */
col_start += col->col_size;
}
}
*/
col_start = mdb_pg_get_int16(mdb, row_end - 3 - bitmask_sz);
for (j=0;j<table->num_cols;j++) {
col = g_ptr_array_index(table->columns,j);
if (!mdb_is_fixed_col(col) && ++var_cols_found <= var_cols) {