| 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" |
