Text_Diff_Engine_string::parseUnifiedDiff( array $diff ): array

91    function parseUnifiedDiff($diff)92    {93        $edits = array();94        $end = count($diff) - 1;95        for ($i = 0; $i < $end;) {96            $diff1 = array();97            switch (substr($diff[$i], 0, 1)) {98            case ' ':99                do {100                    $diff1[] = substr($diff[$i], 1);101                } while (++$i < $end && substr($diff[$i], 0, 1) == ' ');102                $edits[] = new Text_Diff_Op_copy($diff1);103                break;104 105            case '+':106                // get all new lines107                do {108                    $diff1[] = substr($diff[$i], 1);109                } while (++$i < $end && substr($diff[$i], 0, 1) == '+');110                $edits[] = new Text_Diff_Op_add($diff1);111                break;112 113            case '-':114                // get changed or removed lines115                $diff2 = array();116                do {117                    $diff1[] = substr($diff[$i], 1);118                } while (++$i < $end && substr($diff[$i], 0, 1) == '-');119 120                while ($i < $end && substr($diff[$i], 0, 1) == '+') {121                    $diff2[] = substr($diff[$i++], 1);122                }123                if (count($diff2) == 0) {124                    $edits[] = new Text_Diff_Op_delete($diff1);125                } else {126                    $edits[] = new Text_Diff_Op_change($diff1, $diff2);127                }128                break;129 130            default:131                $i++;132                break;133            }134        }135 136        return $edits;137    }