You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.1 KiB
38 lines
1.1 KiB
math
|
|
----
|
|
|
|
Evaluate a mathematical expression.
|
|
|
|
.. code-block:: cmake
|
|
|
|
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
|
|
|
|
.. code-block:: cmake
|
|
|
|
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"
|