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> 255 column patches and multipage table defs from Tim Nelson

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mdb-export fixes
spec file
This commit is contained in:
brianb
2000-10-13 21:33:04 +00:00
parent 9a00f0eb2a
commit fb576534d8
9 changed files with 229 additions and 52 deletions
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81
src/libmdb/table.c
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@@ -48,41 +48,92 @@ int len, i;
return table;
}
/*
** read the next page if offset is > pg_size
** return true if page was read
*/
static int read_pg_if(MdbHandle *mdb, int *cur_pos, int offset)
{
if (*cur_pos + offset >= mdb->pg_size) {
mdb_read_pg(mdb, mdb_get_int32(mdb,4));
*cur_pos = 8 - (mdb->pg_size - (*cur_pos));
return 1;
}
return 0;
}
GPtrArray *mdb_read_columns(MdbTableDef *table)
{
MdbHandle *mdb = table->entry->mdb;
MdbColumn col;
MdbColumn col, *pcol;
int len, i;
unsigned char low_byte, high_byte;
int cur_col, cur_name;
int col_type, col_size;
int col_start, name_start;
char name[MDB_MAX_OBJ_NAME+1];
int name_sz;
table->columns = g_ptr_array_new();
col_start = 43 + (table->num_pgs * 8);
name_start = col_start + (table->num_cols * 18);
cur_col = 43 + (table->num_pgs * 8);
cur_col = col_start;
cur_name = name_start;
/* new code based on patch submitted by Tim Nelson 2000.09.27 */
for (i=0;i<table->num_cols;i++) {
/*
** column attributes
*/
for (i=0; i<table->num_cols;i++) {
memset(&col,'\0', sizeof(MdbColumn));
read_pg_if(mdb, &cur_col, 0);
col.col_type = mdb->pg_buf[cur_col];
col.is_fixed = mdb->pg_buf[cur_col+13] & 0x01 ? 1 : 0;
col.col_size = mdb_get_int16(mdb,cur_col+16);
/* get the name */
name_sz = mdb->pg_buf[cur_name];
memcpy(col.name,&mdb->pg_buf[cur_name+1],name_sz);
col.name[name_sz]='\0';
cur_col += 18;
cur_name += name_sz + 1;
read_pg_if(mdb, &cur_col, 13);
col.is_fixed = mdb->pg_buf[cur_col+13] & 0x01 ? 1 : 0;
read_pg_if(mdb, &cur_col, 17);
low_byte = mdb->pg_buf[cur_col+16];
read_pg_if(mdb, &cur_col, 18);
high_byte = mdb->pg_buf[cur_col+17];
col.col_size += high_byte * 256 + low_byte;
mdb_append_column(table->columns, &col);
cur_col += 18;
}
cur_name = cur_col;
/*
** column names
*/
for (i=0;i<table->num_cols;i++) {
/* fetch the column */
pcol = g_ptr_array_index (table->columns, 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 (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;
}
return table->columns;
}