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

HACKERS

@@ -93,8 +93,8 @@ Column Definition
 -----------------
 
 The second and third bytes of each catalog entry store a 16 bit page pointer to 
-a column definition, including name, type, size and possibly more.  I haven't 
+a column definition, including name, type, size, number of datarows, a pointer 
-fully figured this out so what follows is rough.  
+to the first data page, and possibly more.  I haven't fully figured this out so what follows is rough.  
 
 The header to table definition pages start look something like this:
 
@@ -103,13 +103,27 @@ The header to table definition pages start look something like this:
 | 0x01 | 1 byte  | Unknown                                                |
 | 'VC' | 2 bytes | ???                                                    |
 | 0x00 | 4 bytes | Unknown                                                |
-| ???? | 2 bytes | appears to be a length of the data                     |
+| ???? | 4 bytes | appears to be a length of the data                     |
-| 0x00 |10 bytes | ???                                                    |
+| ???? | 4 bytes | number of rows of data in this table                   |
+| 0x00 | 4 bytes | ???                                                    |
 | 0x4e | 1 byte  | ???                                                    |
-| ???? | 2 bytes | ranges from 1 to 3ish                                  |
+| ???? | 2 bytes | generally same as # of cols but not always             |
-| ???? | 2 bytes | ranges from 1 to 3ish                                  |
+| ???? | 2 bytes | ???                                                    |
-| ???? | 1 byte  | number of columns in table                             |
+| ???? | 2 bytes | number of columns in table                             |
+| ???? | 4 bytes | number of data pages in table                          |
+| ???? | 4 bytes | number of data pages in table (repeat)                 |
+| 0x00 | 1 byte  | ???                                                    |
+| ???? | 2 bytes | page number of first datapage for table                |
+| ???? | 2 bytes | ???                                                    |
+| ???? | 2 bytes | page number of first datapage for table                |
+| 0x00 | 1 byte  | ???                                                    |
 +-------------------------------------------------------------------------+
+| Iterate for the 2 x number of datapages                                 |
++-------------------------------------------------------------------------+
+| ???? | 4 bytes | number of rows in table                                |
+| ???? | 4 bytes | ???                                                    |
++-------------------------------------------------------------------------+
+
 The next few bytes are somewhat of a mystery right now, but around 0x2B from 
 the start of the page (though not always) begins a series of 18 byte records
 one for each column present.  It's format is as follows:

src/include/mdbtools.h

@@ -47,6 +47,13 @@ enum {
 	MDB_UNKNOWN_0A,
 	MDB_UNKNOWN_0B
 };
+enum {
+	MDB_INT = 0x03,
+	MDB_LONGINT = 0x04,
+	MDB_SDATETIME = 0x08,
+	MDB_TEXT = 0x0a,
+	MDB_HYPERLINK = 0x0c
+};
 
 typedef struct {
 	int           fd;

src/libmdb/Makefile

@@ -2,7 +2,7 @@
 CC = gcc
 
 INC = -I ../include `glib-config --cflags`
-OBJS = catalog.o mem.o file.o kkd.o
+OBJS = catalog.o mem.o file.o kkd.o table.o
 
 all: libmdb
 

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;
+	}
+}
+

src/util/Makefile

@@ -3,8 +3,9 @@ CC = gcc
 
 INC = -I ../include `glib-config --cflags`
 LIBS = -L ../libmdb -lmdb `glib-config --libs`
-PROGS = prcat prtable
+PROGS = prcat prkkd prtable
 PRCATOBJS = prcat.o
+PRKKDOBJS = prkkd.o
 PRTABLEOBJS = prtable.o
 
 all: $(PROGS)
@@ -12,6 +13,9 @@ all: $(PROGS)
 prcat: $(PRCATOBJS)
 	$(CC) -g -o $@ $(PRCATOBJS) $(LIBS)
 		
+prkkd: $(PRKKDOBJS)
+	$(CC) -g -o $@ $(PRKKDOBJS) $(LIBS)
+		
 prtable: $(PRTABLEOBJS)
 	$(CC) -g -o $@ $(PRTABLEOBJS) $(LIBS)
 		

src/util/prtable.c

@@ -0,0 +1,51 @@
+/* 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"
+
+main(int argc, char **argv)
+{
+int rows;
+int i;
+unsigned char buf[2048];
+MdbHandle *mdb;
+MdbCatalogEntry entry;
+
+
+	if (argc<2) {
+		fprintf(stderr,"Usage: prtable <file> <table>\n");
+		exit(1);
+	}
+	
+	mdb = mdb_open(argv[1]);
+
+	mdb_read_pg(mdb, MDB_CATALOG_PG);
+	rows = mdb_catalog_rows(mdb);
+
+	for (i=0;i<rows;i++) {
+  		if (mdb_catalog_entry(mdb, i, &entry)) {
+			if (!strcmp(entry.object_name,argv[2])) {
+				mdb_table_dump(&entry);
+  			}
+		}
+	}
+
+	mdb_free_handle(mdb);
+}
+