added simple dump routine for table definitions. needs to be modularized.

2025-10-20 18:50:44 +08:00 · 2000-03-01 03:34:33 +00:00
parent 03410e70f6
commit f9afc55877
6 changed files with 194 additions and 9 deletions
--- a/src/libmdb/table.c
+++ b/src/libmdb/table.c
@@ -0,0 +1,109 @@
+/* MDB Tools - A library for reading MS Access database file
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "mdbtools.h"
+
+
+char *mdb_get_coltype_string(int col_type)
+{
+
+/* 
+** need to do this is a way that will allow multiple outputs for different
+** backend servers...these are MS SQL/Sybase specific 
+*/
+static char *type_name[] = {"Unknown 0x00",
+                        "Unknown 0x01",
+                        "Unknown 0x02",
+                        "smallint",
+                        "int",
+                        "Unknown 0x05",
+                        "Unknown 0x06",
+                        "Unknown 0x07",
+                        "smalldatetime",
+                        "Unknown 0x09",
+                        "varchar",
+                        "Unknown 0x0b"
+                        "hyperlink -- fixme"
+                };
+
+        if (col_type > 11) {
+                return NULL;
+        } else {
+                return type_name[col_type];
+        }
+}
+
+unsigned char mdb_col_needs_size(int col_type)
+{
+	if (col_type == MDB_TEXT) {
+		return TRUE;
+	} else {
+		return FALSE;
+	}
+}
+
+/*
+**   
+*/
+
+void mdb_table_dump(MdbCatalogEntry *entry)
+{
+int num_cols, num_rows, data_pgs, first_dpg;
+int len, i;
+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;
+MdbHandle *mdb = entry->mdb;
+
+	mdb_read_pg(mdb, entry->table_pg);
+	len = mdb_get_int16(mdb,8);
+	num_rows = mdb_get_int32(mdb,12);
+	num_cols = mdb_get_int16(mdb,25);
+	data_pgs = mdb_get_int32(mdb,27);
+	first_dpg = mdb_get_int16(mdb,36);
+	fprintf(stdout,"number of datarows  = %d\n",num_rows);
+	fprintf(stdout,"number of columns   = %d\n",num_cols);
+	fprintf(stdout,"number of datapages = %d\n",data_pgs);
+	fprintf(stdout,"first data page     = %d\n",first_dpg);
+
+	col_start = 43 + (data_pgs * 8);
+	name_start = col_start + (num_cols * 18);
+
+	cur_col = col_start;
+	cur_name = name_start;
+
+	for (i=0;i<num_cols;i++) {
+		col_type = mdb->pg_buf[cur_col];
+		col_size = mdb_get_int16(mdb,cur_col+16);
+		
+		/* get the name */
+		name_sz = mdb->pg_buf[cur_name];
+		memcpy(name,&mdb->pg_buf[cur_name+1],name_sz);
+		name[name_sz]='\0';
+		fprintf(stdout,"column %2d %s\n",i,name);
+		fprintf(stdout,"column type %s\n",mdb_get_coltype_string(col_type));
+		fprintf(stdout,"column size %d\n",col_size);
+
+		cur_col += 18;
+		cur_name += name_sz + 1;
+	}
+}
+