function ctools_math_expr::__construct

Public constructor.

File

includes/math-expr.inc, line 144

Class

ctools_math_expr

ctools_math_expr Class.

Code

public function __construct() {
    $this->userfuncs = array();
    $this->simplefuncs = array(
        'sin',
        'sinh',
        'asin',
        'asinh',
        'cos',
        'cosh',
        'acos',
        'acosh',
        'tan',
        'tanh',
        'atan',
        'atanh',
        'exp',
        'sqrt',
        'abs',
        'log',
        'ceil',
        'floor',
        'round',
    );
    $this->ops = array(
        '+' => array(
            'precedence' => 0,
        ),
        '-' => array(
            'precedence' => 0,
        ),
        '*' => array(
            'precedence' => 1,
        ),
        '/' => array(
            'precedence' => 1,
        ),
        '^' => array(
            'precedence' => 2,
            'right' => TRUE,
        ),
        '_' => array(
            'precedence' => 1,
        ),
        '==' => array(
            'precedence' => -1,
        ),
        '!=' => array(
            'precedence' => -1,
        ),
        '>=' => array(
            'precedence' => -1,
        ),
        '<=' => array(
            'precedence' => -1,
        ),
        '>' => array(
            'precedence' => -1,
        ),
        '<' => array(
            'precedence' => -1,
        ),
    );
    $this->binaryops = array(
        '+',
        '-',
        '*',
        '/',
        '^',
        '==',
        '!=',
        '<',
        '<=',
        '>=',
        '>',
    );
    $this->funcs = array(
        'ln' => array(
            'function' => 'log',
            'arguments' => 1,
        ),
        'arcsin' => array(
            'function' => 'asin',
            'arguments' => 1,
        ),
        'arcsinh' => array(
            'function' => 'asinh',
            'arguments' => 1,
        ),
        'arccos' => array(
            'function' => 'acos',
            'arguments' => 1,
        ),
        'arccosh' => array(
            'function' => 'acosh',
            'arguments' => 1,
        ),
        'arctan' => array(
            'function' => 'atan',
            'arguments' => 1,
        ),
        'arctanh' => array(
            'function' => 'atanh',
            'arguments' => 1,
        ),
        'min' => array(
            'function' => 'min',
            'arguments' => 2,
            'max arguments' => 99,
        ),
        'max' => array(
            'function' => 'max',
            'arguments' => 2,
            'max arguments' => 99,
        ),
        'pow' => array(
            'function' => 'pow',
            'arguments' => 2,
        ),
        'if' => array(
            'function' => 'ctools_math_expr_if',
            'arguments' => 2,
            'max arguments' => 3,
        ),
        'number' => array(
            'function' => 'ctools_math_expr_number',
            'arguments' => 1,
        ),
        'time' => array(
            'function' => 'time',
            'arguments' => 0,
        ),
    );
    // Allow modules to add custom functions.
    $context = array(
        'final' => &$this->funcs,
    );
    drupal_alter('ctools_math_expression_functions', $this->simplefuncs, $context);
    // Set up the initial constants and mark them read-only.
    $this->vars = array(
        'e' => exp(1),
        'pi' => pi(),
    );
    drupal_alter('ctools_math_expression_constants', $this->vars);
    $this->constvars = array_keys($this->vars);
    // Translate the older, simpler style into the newer, richer style.
    foreach ($this->simplefuncs as $function) {
        $this->funcs[$function] = array(
            'function' => $function,
            'arguments' => 1,
        );
    }
}