private function scanFloatingPointLiteral()

in experiments/Lexer.php [524:573]
42 lines of code
13 McCabe index (conditional complexity)

    private function scanFloatingPointLiteral($text, & $pos, $endOfFilePos) {
        $hasDot = false;
        $expStart = null;
        $hasSign = false;
        while ($pos < $endOfFilePos) {
            $char = $text[$pos];

            if ($this->isDigitChar(ord($char))) {
                $pos++;
                continue;
            } elseif ($char === ".") {
                if ($hasDot || $expStart !== null) {
                    // Dot not valid, done scanning
                     break;
                }
                $hasDot = true;
                $pos++;
                continue;
            } elseif ($char === "e" || $char === "E") {
                if ($expStart !== null) {
                    // exponential not valid here, done scanning
                     break;
                }
                $expStart = $pos;
                $pos++;
                continue;
            } elseif ($char === "+" || $char === "-") {
                if ($expStart !== null && $expStart === $pos-1) {
                    $hasSign = true;
                    $pos++;
                    continue;
                }
                 // sign not valid here, done scanning
                 break;
            }
             // unexpected character, done scanning
             break;
        }

        if ($expStart !== null) {
            $expectedMinPos = $hasSign ? $expStart + 3 : $expStart + 2;
            if ($pos >= $expectedMinPos) {
                return true;
            }
             // exponential is invalid, reset position
             $pos = $expStart;
        }

        return $hasDot;
    }