Spreadsheet application code.

You can dump some information in a dbgutil build:

=== CTRL+SHIFT+F12 ===

Dumps the column width of the first 20 columns.

=== CTRL+SHIFT+F11 ===

Dumps the graphic objects and their position and size in pixel.

=== CTRL+SHIFT+F6 ===

Dumps the SfxItemSet representing the cell properties' of the
current selection as a xml file. The file will be named dump.xml

=== The Cache Format ===

ScDocument::StoreTabToCache allows storing the content (not the formatting)
of a table to a binary cache format.

The format is column orientated which allows quick serialization of the table.

Header:
    * Number of Columns: 64 bit unsigned integer

Column:
    * Column Index: 64 bit unsigned integer
    * Column Size: 64 bit unsigned integer
    * For each cell type block a new ColumnBlock

ColumnBlock:
    * Start Row: 64 bit unsigned integer
    * Block Size: 64 bit unsigned integer
    * Type: 8 bit unsigned integer
        - 0 : empty
        - 1 : numeric
            * for each cell: 64 bit IEEE 754 double precision value
        - 2 : string
            * for each cell: 32 bit signed string length followed by string length bytes of the string (UTF-8)
        - 3 : formula
            * for each cell: 32 bit signed string length followed by the formula in R1C1 notation as a string


=== Functions supporting Wildcards or Regular Expressions ===

As this comes up every now and then, and rather should be documented in an
extra list of the Help system, functions that support Wildcards or Regular
Expressions *and* depend on the setting under
Tools -> Options -> Calc -> Calculate are those that in ODF OpenFormula (ODFF)
are defined to depend on the HOST-USE-REGULAR-EXPRESSIONS or HOST-USE-WILDCARDS
properties, see
https://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part2.html

* Database Functions
  * DAVERAGE
  * DCOUNT
  * DCOUNTA
  * DGET
  * DMAX
  * DMIN
  * DPRODUCT
  * DSTDEV
  * DSTDEVP
  * DSUM
  * DVAR
  * DVARP
* Information Functions
  * COUNTIF
  * COUNTIFS
* Lookup Functions
  * HLOOKUP
  * LOOKUP
  * MATCH
  * VLOOKUP
* Mathematical Functions
  * SUMIF
  * SUMIFS
* Statistical Functions
  * AVERAGEIF
  * AVERAGEIFS
* Text Functions
  * SEARCH