Evaluate a mathematical expression.
math(EXPR <variable> "<expression>" [OUTPUT_FORMAT <format>])
Evaluates a mathematical <expression>
and sets <variable>
to the resulting value. The result of the expression must be representable as a 64-bit signed integer.
The mathematical expression must be given as a string (i.e. enclosed in double quotation marks). An example is "5 * (10 + 13)"
. Supported operators are +
, -
, *
, /
, %
, |
, &
, ^
, ~
, <<
, >>
, and (...)
; they have the same meaning as in C code.
Hexadecimal numbers are recognized when prefixed with 0x
, as in C code.
The result is formatted according to the option OUTPUT_FORMAT
, where <format>
is one of
HEXADECIMAL
Hexadecimal notation as in C code, i. e. starting with “0x”.
DECIMAL
Decimal notation. Which is also used if no OUTPUT_FORMAT
option is specified.
For example
math(EXPR value "100 * 0xA" OUTPUT_FORMAT DECIMAL) # value is set to "1000" math(EXPR value "100 * 0xA" OUTPUT_FORMAT HEXADECIMAL) # value is set to "0x3e8"
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.19/command/math.html