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

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brianb
2000-03-01 03:34:33 +00:00
parent 03410e70f6
commit f9afc55877
6 changed files with 194 additions and 9 deletions
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@@ -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
fully figured this out so what follows is rough.
a column definition, including name, type, size, number of datarows, a pointer
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 |
| 0x00 |10 bytes | ??? |
| ???? | 4 bytes | appears to be a length of the data |
| ???? | 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 | ranges from 1 to 3ish |
| ???? | 1 byte | number of columns in table |
| ???? | 2 bytes | generally same as # of cols but not always |
| ???? | 2 bytes | ??? |
| ???? | 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: