The Microsoft Excel File Format - OpenOffice.org

3 Formulas
Example of the formula = CHOOSE(2, 1,2, 3). The formula contains spaces before the function
identifier and before the second and fourth parameter.
Offset Size Token name Description
0 2 tInt The choice: the integer constant 2 (take second choice)
2 12 tAttrChoose Function contains 3 choices (nc = 3)
Jump table: distances to start positions of the next nc = 3
parameters (including the size of this jump table:
nc∙2+2 = 3∙2+2 = 8 bytes):
- First choice: 8 bytes (skip the jump table only)
- Second choice: 8+7+4 = 19 bytes
- Third choice: 8+7+7+4 = 26 bytes
Distance to start of tFuncVar(CHOOSE) token (including
jump table size, leading tAttrSpace tokens will be skipped
too): 8+7+7+11+8 = 41 bytes
14 4 tAttrSpace Leading spaces for the next token
18 3 tInt First choice parameter: the constant 1
21 4 tAttrSkip Distance to position behind tFuncVar(CHOOSE) token
(minus 1): 11+11+8–1 = 29 bytes
25 3 tInt Second choice parameter: the constant 2
28 4 tAttrSkip Distance to position behind tFuncVar(CHOOSE) token
(minus 1): 11+8–1 = 18 bytes
32 4 tAttrSpace Leading spaces for the next token
36 3 tInt Third choice parameter: the constant 3
39 4 tAttrSpace Leading spaces for the next token (the function identifier).
Note that the tAttrSpace tokens related to the function
itself are located before the tAttrSkip token!
43 4 tAttrSkip Distance to position behind tFuncVar(CHOOSE) token
(minus 1): 4–1 = 3 bytes
47 4 tFuncVar(CHOOSE) Identifier of the CHOOSE function with 4 parameters
• Jump to Position – The tAttrSkip Token
This token is used to let formula evaluation continue at another position in the token array. It contains the number of
bytes to skip from the current position. For no obvious reason, this value is always one less than the actual number. This
token is only used in conjunction with the tAttrIf token and tAttrChoose token (see tAttrIf and tAttrChosse tokens above
for examples).
Token tAttrSkip, BIFF2:
Offset Size Contents
0 1 19 H
1 1 08 H (identifier for the tAttrSkip token)
2 1 Distance (number of bytes) from start of next token to destination position, decreased by 1
Token tAttrSkip, BIFF3-BIFF8:
Offset Size Contents
0 1 19 H
1 1 08 H (identifier for the tAttrSkip token)
2 2 Distance (number of bytes) from start of next token to destination position, decreased by 1
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