1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/markbaker/complex/classes/src/functions/atanh.php b/vendor/markbaker/complex/classes/src/functions/atanh.php
new file mode 100644
index 0000000..d1e60e6
--- /dev/null
+++ b/vendor/markbaker/complex/classes/src/functions/atanh.php
@@ -0,0 +1,40 @@
+<?php
+
+/**
+ *
+ * Function code for the complex atanh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic tangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic tangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+if (!function_exists(__NAMESPACE__ . '\\atanh')) {
+    function atanh($complex): Complex
+    {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($complex->isReal()) {
+            $real = $complex->getReal();
+            if ($real >= -1.0 && $real <= 1.0) {
+                return new Complex(\atanh($real));
+            } else {
+                return new Complex(\atanh(1 / $real), (($real < 0.0) ? M_PI_2 : -1 * M_PI_2));
+            }
+        }
+
+        $iComplex = clone $complex;
+        $iComplex = $iComplex->invertImaginary()
+            ->reverse();
+        return atan($iComplex)
+            ->invertReal()
+            ->reverse();
+    }
+}