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Parser.php @ 1

Last change on this file since 1 was 1, checked in by dungnv, 11 years ago

File size: 55.7 KB

Rev	Line
[1]	1	<?php
	2	/**
	3	* PHPExcel
	4	*
	5	* Copyright (c) 2006 - 2014 PHPExcel
	6	*
	7	* This library is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* This library is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with this library; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*
	21	* @category PHPExcel
	22	* @package PHPExcel_Writer_Excel5
	23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
	24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
	25	* @version 1.8.0, 2014-03-02
	26	*/
	27
	28	// Original file header of PEAR::Spreadsheet_Excel_Writer_Parser (used as the base for this class):
	29	// -----------------------------------------------------------------------------------------
	30	// * Class for parsing Excel formulas
	31	// *
	32	// * License Information:
	33	// *
	34	// * Spreadsheet_Excel_Writer: A library for generating Excel Spreadsheets
	35	// * Copyright (c) 2002-2003 Xavier Noguer xnoguer@rezebra.com
	36	// *
	37	// * This library is free software; you can redistribute it and/or
	38	// * modify it under the terms of the GNU Lesser General Public
	39	// * License as published by the Free Software Foundation; either
	40	// * version 2.1 of the License, or (at your option) any later version.
	41	// *
	42	// * This library is distributed in the hope that it will be useful,
	43	// * but WITHOUT ANY WARRANTY; without even the implied warranty of
	44	// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	45	// * Lesser General Public License for more details.
	46	// *
	47	// * You should have received a copy of the GNU Lesser General Public
	48	// * License along with this library; if not, write to the Free Software
	49	// * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	50	// */
	51
	52
	53	/**
	54	* PHPExcel_Writer_Excel5_Parser
	55	*
	56	* @category PHPExcel
	57	* @package PHPExcel_Writer_Excel5
	58	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
	59	*/
	60	class PHPExcel_Writer_Excel5_Parser
	61	{
	62	/** Constants */
	63	// Sheet title in unquoted form
	64	// Invalid sheet title characters cannot occur in the sheet title:
	65	// *:/\?[]
	66	// Moreover, there are valid sheet title characters that cannot occur in unquoted form (there may be more?)
	67	// +-% '^&<>=,;#()"{}
	68	const REGEX_SHEET_TITLE_UNQUOTED = '[^\*\:\/\\\\\?\[\]\+\-\% \\\'\^\&\<\>\=\,\;\#\"\{\}]+';
	69
	70	// Sheet title in quoted form (without surrounding quotes)
	71	// Invalid sheet title characters cannot occur in the sheet title:
	72	// *:/\?[] (usual invalid sheet title characters)
	73	// Single quote is represented as a pair ''
	74	const REGEX_SHEET_TITLE_QUOTED = '(([^\*\:\/\\\\\?\[\]\\\'])+\|(\\\'\\\')+)+';
	75
	76	/**
	77	* The index of the character we are currently looking at
	78	* @var integer
	79	*/
	80	public $_current_char;
	81
	82	/**
	83	* The token we are working on.
	84	* @var string
	85	*/
	86	public $_current_token;
	87
	88	/**
	89	* The formula to parse
	90	* @var string
	91	*/
	92	public $_formula;
	93
	94	/**
	95	* The character ahead of the current char
	96	* @var string
	97	*/
	98	public $_lookahead;
	99
	100	/**
	101	* The parse tree to be generated
	102	* @var string
	103	*/
	104	public $_parse_tree;
	105
	106	/**
	107	* Array of external sheets
	108	* @var array
	109	*/
	110	public $_ext_sheets;
	111
	112	/**
	113	* Array of sheet references in the form of REF structures
	114	* @var array
	115	*/
	116	public $_references;
	117
	118	/**
	119	* The class constructor
	120	*
	121	*/
	122	public function __construct()
	123	{
	124	$this->_current_char = 0;
	125	$this->_current_token = ''; // The token we are working on.
	126	$this->_formula = ''; // The formula to parse.
	127	$this->_lookahead = ''; // The character ahead of the current char.
	128	$this->_parse_tree = ''; // The parse tree to be generated.
	129	$this->_initializeHashes(); // Initialize the hashes: ptg's and function's ptg's
	130	$this->_ext_sheets = array();
	131	$this->_references = array();
	132	}
	133
	134	/**
	135	* Initialize the ptg and function hashes.
	136	*
	137	* @access private
	138	*/
	139	function _initializeHashes()
	140	{
	141	// The Excel ptg indices
	142	$this->ptg = array(
	143	'ptgExp' => 0x01,
	144	'ptgTbl' => 0x02,
	145	'ptgAdd' => 0x03,
	146	'ptgSub' => 0x04,
	147	'ptgMul' => 0x05,
	148	'ptgDiv' => 0x06,
	149	'ptgPower' => 0x07,
	150	'ptgConcat' => 0x08,
	151	'ptgLT' => 0x09,
	152	'ptgLE' => 0x0A,
	153	'ptgEQ' => 0x0B,
	154	'ptgGE' => 0x0C,
	155	'ptgGT' => 0x0D,
	156	'ptgNE' => 0x0E,
	157	'ptgIsect' => 0x0F,
	158	'ptgUnion' => 0x10,
	159	'ptgRange' => 0x11,
	160	'ptgUplus' => 0x12,
	161	'ptgUminus' => 0x13,
	162	'ptgPercent' => 0x14,
	163	'ptgParen' => 0x15,
	164	'ptgMissArg' => 0x16,
	165	'ptgStr' => 0x17,
	166	'ptgAttr' => 0x19,
	167	'ptgSheet' => 0x1A,
	168	'ptgEndSheet' => 0x1B,
	169	'ptgErr' => 0x1C,
	170	'ptgBool' => 0x1D,
	171	'ptgInt' => 0x1E,
	172	'ptgNum' => 0x1F,
	173	'ptgArray' => 0x20,
	174	'ptgFunc' => 0x21,
	175	'ptgFuncVar' => 0x22,
	176	'ptgName' => 0x23,
	177	'ptgRef' => 0x24,
	178	'ptgArea' => 0x25,
	179	'ptgMemArea' => 0x26,
	180	'ptgMemErr' => 0x27,
	181	'ptgMemNoMem' => 0x28,
	182	'ptgMemFunc' => 0x29,
	183	'ptgRefErr' => 0x2A,
	184	'ptgAreaErr' => 0x2B,
	185	'ptgRefN' => 0x2C,
	186	'ptgAreaN' => 0x2D,
	187	'ptgMemAreaN' => 0x2E,
	188	'ptgMemNoMemN' => 0x2F,
	189	'ptgNameX' => 0x39,
	190	'ptgRef3d' => 0x3A,
	191	'ptgArea3d' => 0x3B,
	192	'ptgRefErr3d' => 0x3C,
	193	'ptgAreaErr3d' => 0x3D,
	194	'ptgArrayV' => 0x40,
	195	'ptgFuncV' => 0x41,
	196	'ptgFuncVarV' => 0x42,
	197	'ptgNameV' => 0x43,
	198	'ptgRefV' => 0x44,
	199	'ptgAreaV' => 0x45,
	200	'ptgMemAreaV' => 0x46,
	201	'ptgMemErrV' => 0x47,
	202	'ptgMemNoMemV' => 0x48,
	203	'ptgMemFuncV' => 0x49,
	204	'ptgRefErrV' => 0x4A,
	205	'ptgAreaErrV' => 0x4B,
	206	'ptgRefNV' => 0x4C,
	207	'ptgAreaNV' => 0x4D,
	208	'ptgMemAreaNV' => 0x4E,
	209	'ptgMemNoMemN' => 0x4F,
	210	'ptgFuncCEV' => 0x58,
	211	'ptgNameXV' => 0x59,
	212	'ptgRef3dV' => 0x5A,
	213	'ptgArea3dV' => 0x5B,
	214	'ptgRefErr3dV' => 0x5C,
	215	'ptgAreaErr3d' => 0x5D,
	216	'ptgArrayA' => 0x60,
	217	'ptgFuncA' => 0x61,
	218	'ptgFuncVarA' => 0x62,
	219	'ptgNameA' => 0x63,
	220	'ptgRefA' => 0x64,
	221	'ptgAreaA' => 0x65,
	222	'ptgMemAreaA' => 0x66,
	223	'ptgMemErrA' => 0x67,
	224	'ptgMemNoMemA' => 0x68,
	225	'ptgMemFuncA' => 0x69,
	226	'ptgRefErrA' => 0x6A,
	227	'ptgAreaErrA' => 0x6B,
	228	'ptgRefNA' => 0x6C,
	229	'ptgAreaNA' => 0x6D,
	230	'ptgMemAreaNA' => 0x6E,
	231	'ptgMemNoMemN' => 0x6F,
	232	'ptgFuncCEA' => 0x78,
	233	'ptgNameXA' => 0x79,
	234	'ptgRef3dA' => 0x7A,
	235	'ptgArea3dA' => 0x7B,
	236	'ptgRefErr3dA' => 0x7C,
	237	'ptgAreaErr3d' => 0x7D
	238	);
	239
	240	// Thanks to Michael Meeks and Gnumeric for the initial arg values.
	241	//
	242	// The following hash was generated by "function_locale.pl" in the distro.
	243	// Refer to function_locale.pl for non-English function names.
	244	//
	245	// The array elements are as follow:
	246	// ptg: The Excel function ptg code.
	247	// args: The number of arguments that the function takes:
	248	// >=0 is a fixed number of arguments.
	249	// -1 is a variable number of arguments.
	250	// class: The reference, value or array class of the function args.
	251	// vol: The function is volatile.
	252	//
	253	$this->_functions = array(
	254	// function ptg args class vol
	255	'COUNT' => array( 0, -1, 0, 0 ),
	256	'IF' => array( 1, -1, 1, 0 ),
	257	'ISNA' => array( 2, 1, 1, 0 ),
	258	'ISERROR' => array( 3, 1, 1, 0 ),
	259	'SUM' => array( 4, -1, 0, 0 ),
	260	'AVERAGE' => array( 5, -1, 0, 0 ),
	261	'MIN' => array( 6, -1, 0, 0 ),
	262	'MAX' => array( 7, -1, 0, 0 ),
	263	'ROW' => array( 8, -1, 0, 0 ),
	264	'COLUMN' => array( 9, -1, 0, 0 ),
	265	'NA' => array( 10, 0, 0, 0 ),
	266	'NPV' => array( 11, -1, 1, 0 ),
	267	'STDEV' => array( 12, -1, 0, 0 ),
	268	'DOLLAR' => array( 13, -1, 1, 0 ),
	269	'FIXED' => array( 14, -1, 1, 0 ),
	270	'SIN' => array( 15, 1, 1, 0 ),
	271	'COS' => array( 16, 1, 1, 0 ),
	272	'TAN' => array( 17, 1, 1, 0 ),
	273	'ATAN' => array( 18, 1, 1, 0 ),
	274	'PI' => array( 19, 0, 1, 0 ),
	275	'SQRT' => array( 20, 1, 1, 0 ),
	276	'EXP' => array( 21, 1, 1, 0 ),
	277	'LN' => array( 22, 1, 1, 0 ),
	278	'LOG10' => array( 23, 1, 1, 0 ),
	279	'ABS' => array( 24, 1, 1, 0 ),
	280	'INT' => array( 25, 1, 1, 0 ),
	281	'SIGN' => array( 26, 1, 1, 0 ),
	282	'ROUND' => array( 27, 2, 1, 0 ),
	283	'LOOKUP' => array( 28, -1, 0, 0 ),
	284	'INDEX' => array( 29, -1, 0, 1 ),
	285	'REPT' => array( 30, 2, 1, 0 ),
	286	'MID' => array( 31, 3, 1, 0 ),
	287	'LEN' => array( 32, 1, 1, 0 ),
	288	'VALUE' => array( 33, 1, 1, 0 ),
	289	'TRUE' => array( 34, 0, 1, 0 ),
	290	'FALSE' => array( 35, 0, 1, 0 ),
	291	'AND' => array( 36, -1, 0, 0 ),
	292	'OR' => array( 37, -1, 0, 0 ),
	293	'NOT' => array( 38, 1, 1, 0 ),
	294	'MOD' => array( 39, 2, 1, 0 ),
	295	'DCOUNT' => array( 40, 3, 0, 0 ),
	296	'DSUM' => array( 41, 3, 0, 0 ),
	297	'DAVERAGE' => array( 42, 3, 0, 0 ),
	298	'DMIN' => array( 43, 3, 0, 0 ),
	299	'DMAX' => array( 44, 3, 0, 0 ),
	300	'DSTDEV' => array( 45, 3, 0, 0 ),
	301	'VAR' => array( 46, -1, 0, 0 ),
	302	'DVAR' => array( 47, 3, 0, 0 ),
	303	'TEXT' => array( 48, 2, 1, 0 ),
	304	'LINEST' => array( 49, -1, 0, 0 ),
	305	'TREND' => array( 50, -1, 0, 0 ),
	306	'LOGEST' => array( 51, -1, 0, 0 ),
	307	'GROWTH' => array( 52, -1, 0, 0 ),
	308	'PV' => array( 56, -1, 1, 0 ),
	309	'FV' => array( 57, -1, 1, 0 ),
	310	'NPER' => array( 58, -1, 1, 0 ),
	311	'PMT' => array( 59, -1, 1, 0 ),
	312	'RATE' => array( 60, -1, 1, 0 ),
	313	'MIRR' => array( 61, 3, 0, 0 ),
	314	'IRR' => array( 62, -1, 0, 0 ),
	315	'RAND' => array( 63, 0, 1, 1 ),
	316	'MATCH' => array( 64, -1, 0, 0 ),
	317	'DATE' => array( 65, 3, 1, 0 ),
	318	'TIME' => array( 66, 3, 1, 0 ),
	319	'DAY' => array( 67, 1, 1, 0 ),
	320	'MONTH' => array( 68, 1, 1, 0 ),
	321	'YEAR' => array( 69, 1, 1, 0 ),
	322	'WEEKDAY' => array( 70, -1, 1, 0 ),
	323	'HOUR' => array( 71, 1, 1, 0 ),
	324	'MINUTE' => array( 72, 1, 1, 0 ),
	325	'SECOND' => array( 73, 1, 1, 0 ),
	326	'NOW' => array( 74, 0, 1, 1 ),
	327	'AREAS' => array( 75, 1, 0, 1 ),
	328	'ROWS' => array( 76, 1, 0, 1 ),
	329	'COLUMNS' => array( 77, 1, 0, 1 ),
	330	'OFFSET' => array( 78, -1, 0, 1 ),
	331	'SEARCH' => array( 82, -1, 1, 0 ),
	332	'TRANSPOSE' => array( 83, 1, 1, 0 ),
	333	'TYPE' => array( 86, 1, 1, 0 ),
	334	'ATAN2' => array( 97, 2, 1, 0 ),
	335	'ASIN' => array( 98, 1, 1, 0 ),
	336	'ACOS' => array( 99, 1, 1, 0 ),
	337	'CHOOSE' => array( 100, -1, 1, 0 ),
	338	'HLOOKUP' => array( 101, -1, 0, 0 ),
	339	'VLOOKUP' => array( 102, -1, 0, 0 ),
	340	'ISREF' => array( 105, 1, 0, 0 ),
	341	'LOG' => array( 109, -1, 1, 0 ),
	342	'CHAR' => array( 111, 1, 1, 0 ),
	343	'LOWER' => array( 112, 1, 1, 0 ),
	344	'UPPER' => array( 113, 1, 1, 0 ),
	345	'PROPER' => array( 114, 1, 1, 0 ),
	346	'LEFT' => array( 115, -1, 1, 0 ),
	347	'RIGHT' => array( 116, -1, 1, 0 ),
	348	'EXACT' => array( 117, 2, 1, 0 ),
	349	'TRIM' => array( 118, 1, 1, 0 ),
	350	'REPLACE' => array( 119, 4, 1, 0 ),
	351	'SUBSTITUTE' => array( 120, -1, 1, 0 ),
	352	'CODE' => array( 121, 1, 1, 0 ),
	353	'FIND' => array( 124, -1, 1, 0 ),
	354	'CELL' => array( 125, -1, 0, 1 ),
	355	'ISERR' => array( 126, 1, 1, 0 ),
	356	'ISTEXT' => array( 127, 1, 1, 0 ),
	357	'ISNUMBER' => array( 128, 1, 1, 0 ),
	358	'ISBLANK' => array( 129, 1, 1, 0 ),
	359	'T' => array( 130, 1, 0, 0 ),
	360	'N' => array( 131, 1, 0, 0 ),
	361	'DATEVALUE' => array( 140, 1, 1, 0 ),
	362	'TIMEVALUE' => array( 141, 1, 1, 0 ),
	363	'SLN' => array( 142, 3, 1, 0 ),
	364	'SYD' => array( 143, 4, 1, 0 ),
	365	'DDB' => array( 144, -1, 1, 0 ),
	366	'INDIRECT' => array( 148, -1, 1, 1 ),
	367	'CALL' => array( 150, -1, 1, 0 ),
	368	'CLEAN' => array( 162, 1, 1, 0 ),
	369	'MDETERM' => array( 163, 1, 2, 0 ),
	370	'MINVERSE' => array( 164, 1, 2, 0 ),
	371	'MMULT' => array( 165, 2, 2, 0 ),
	372	'IPMT' => array( 167, -1, 1, 0 ),
	373	'PPMT' => array( 168, -1, 1, 0 ),
	374	'COUNTA' => array( 169, -1, 0, 0 ),
	375	'PRODUCT' => array( 183, -1, 0, 0 ),
	376	'FACT' => array( 184, 1, 1, 0 ),
	377	'DPRODUCT' => array( 189, 3, 0, 0 ),
	378	'ISNONTEXT' => array( 190, 1, 1, 0 ),
	379	'STDEVP' => array( 193, -1, 0, 0 ),
	380	'VARP' => array( 194, -1, 0, 0 ),
	381	'DSTDEVP' => array( 195, 3, 0, 0 ),
	382	'DVARP' => array( 196, 3, 0, 0 ),
	383	'TRUNC' => array( 197, -1, 1, 0 ),
	384	'ISLOGICAL' => array( 198, 1, 1, 0 ),
	385	'DCOUNTA' => array( 199, 3, 0, 0 ),
	386	'USDOLLAR' => array( 204, -1, 1, 0 ),
	387	'FINDB' => array( 205, -1, 1, 0 ),
	388	'SEARCHB' => array( 206, -1, 1, 0 ),
	389	'REPLACEB' => array( 207, 4, 1, 0 ),
	390	'LEFTB' => array( 208, -1, 1, 0 ),
	391	'RIGHTB' => array( 209, -1, 1, 0 ),
	392	'MIDB' => array( 210, 3, 1, 0 ),
	393	'LENB' => array( 211, 1, 1, 0 ),
	394	'ROUNDUP' => array( 212, 2, 1, 0 ),
	395	'ROUNDDOWN' => array( 213, 2, 1, 0 ),
	396	'ASC' => array( 214, 1, 1, 0 ),
	397	'DBCS' => array( 215, 1, 1, 0 ),
	398	'RANK' => array( 216, -1, 0, 0 ),
	399	'ADDRESS' => array( 219, -1, 1, 0 ),
	400	'DAYS360' => array( 220, -1, 1, 0 ),
	401	'TODAY' => array( 221, 0, 1, 1 ),
	402	'VDB' => array( 222, -1, 1, 0 ),
	403	'MEDIAN' => array( 227, -1, 0, 0 ),
	404	'SUMPRODUCT' => array( 228, -1, 2, 0 ),
	405	'SINH' => array( 229, 1, 1, 0 ),
	406	'COSH' => array( 230, 1, 1, 0 ),
	407	'TANH' => array( 231, 1, 1, 0 ),
	408	'ASINH' => array( 232, 1, 1, 0 ),
	409	'ACOSH' => array( 233, 1, 1, 0 ),
	410	'ATANH' => array( 234, 1, 1, 0 ),
	411	'DGET' => array( 235, 3, 0, 0 ),
	412	'INFO' => array( 244, 1, 1, 1 ),
	413	'DB' => array( 247, -1, 1, 0 ),
	414	'FREQUENCY' => array( 252, 2, 0, 0 ),
	415	'ERROR.TYPE' => array( 261, 1, 1, 0 ),
	416	'REGISTER.ID' => array( 267, -1, 1, 0 ),
	417	'AVEDEV' => array( 269, -1, 0, 0 ),
	418	'BETADIST' => array( 270, -1, 1, 0 ),
	419	'GAMMALN' => array( 271, 1, 1, 0 ),
	420	'BETAINV' => array( 272, -1, 1, 0 ),
	421	'BINOMDIST' => array( 273, 4, 1, 0 ),
	422	'CHIDIST' => array( 274, 2, 1, 0 ),
	423	'CHIINV' => array( 275, 2, 1, 0 ),
	424	'COMBIN' => array( 276, 2, 1, 0 ),
	425	'CONFIDENCE' => array( 277, 3, 1, 0 ),
	426	'CRITBINOM' => array( 278, 3, 1, 0 ),
	427	'EVEN' => array( 279, 1, 1, 0 ),
	428	'EXPONDIST' => array( 280, 3, 1, 0 ),
	429	'FDIST' => array( 281, 3, 1, 0 ),
	430	'FINV' => array( 282, 3, 1, 0 ),
	431	'FISHER' => array( 283, 1, 1, 0 ),
	432	'FISHERINV' => array( 284, 1, 1, 0 ),
	433	'FLOOR' => array( 285, 2, 1, 0 ),
	434	'GAMMADIST' => array( 286, 4, 1, 0 ),
	435	'GAMMAINV' => array( 287, 3, 1, 0 ),
	436	'CEILING' => array( 288, 2, 1, 0 ),
	437	'HYPGEOMDIST' => array( 289, 4, 1, 0 ),
	438	'LOGNORMDIST' => array( 290, 3, 1, 0 ),
	439	'LOGINV' => array( 291, 3, 1, 0 ),
	440	'NEGBINOMDIST' => array( 292, 3, 1, 0 ),
	441	'NORMDIST' => array( 293, 4, 1, 0 ),
	442	'NORMSDIST' => array( 294, 1, 1, 0 ),
	443	'NORMINV' => array( 295, 3, 1, 0 ),
	444	'NORMSINV' => array( 296, 1, 1, 0 ),
	445	'STANDARDIZE' => array( 297, 3, 1, 0 ),
	446	'ODD' => array( 298, 1, 1, 0 ),
	447	'PERMUT' => array( 299, 2, 1, 0 ),
	448	'POISSON' => array( 300, 3, 1, 0 ),
	449	'TDIST' => array( 301, 3, 1, 0 ),
	450	'WEIBULL' => array( 302, 4, 1, 0 ),
	451	'SUMXMY2' => array( 303, 2, 2, 0 ),
	452	'SUMX2MY2' => array( 304, 2, 2, 0 ),
	453	'SUMX2PY2' => array( 305, 2, 2, 0 ),
	454	'CHITEST' => array( 306, 2, 2, 0 ),
	455	'CORREL' => array( 307, 2, 2, 0 ),
	456	'COVAR' => array( 308, 2, 2, 0 ),
	457	'FORECAST' => array( 309, 3, 2, 0 ),
	458	'FTEST' => array( 310, 2, 2, 0 ),
	459	'INTERCEPT' => array( 311, 2, 2, 0 ),
	460	'PEARSON' => array( 312, 2, 2, 0 ),
	461	'RSQ' => array( 313, 2, 2, 0 ),
	462	'STEYX' => array( 314, 2, 2, 0 ),
	463	'SLOPE' => array( 315, 2, 2, 0 ),
	464	'TTEST' => array( 316, 4, 2, 0 ),
	465	'PROB' => array( 317, -1, 2, 0 ),
	466	'DEVSQ' => array( 318, -1, 0, 0 ),
	467	'GEOMEAN' => array( 319, -1, 0, 0 ),
	468	'HARMEAN' => array( 320, -1, 0, 0 ),
	469	'SUMSQ' => array( 321, -1, 0, 0 ),
	470	'KURT' => array( 322, -1, 0, 0 ),
	471	'SKEW' => array( 323, -1, 0, 0 ),
	472	'ZTEST' => array( 324, -1, 0, 0 ),
	473	'LARGE' => array( 325, 2, 0, 0 ),
	474	'SMALL' => array( 326, 2, 0, 0 ),
	475	'QUARTILE' => array( 327, 2, 0, 0 ),
	476	'PERCENTILE' => array( 328, 2, 0, 0 ),
	477	'PERCENTRANK' => array( 329, -1, 0, 0 ),
	478	'MODE' => array( 330, -1, 2, 0 ),
	479	'TRIMMEAN' => array( 331, 2, 0, 0 ),
	480	'TINV' => array( 332, 2, 1, 0 ),
	481	'CONCATENATE' => array( 336, -1, 1, 0 ),
	482	'POWER' => array( 337, 2, 1, 0 ),
	483	'RADIANS' => array( 342, 1, 1, 0 ),
	484	'DEGREES' => array( 343, 1, 1, 0 ),
	485	'SUBTOTAL' => array( 344, -1, 0, 0 ),
	486	'SUMIF' => array( 345, -1, 0, 0 ),
	487	'COUNTIF' => array( 346, 2, 0, 0 ),
	488	'COUNTBLANK' => array( 347, 1, 0, 0 ),
	489	'ISPMT' => array( 350, 4, 1, 0 ),
	490	'DATEDIF' => array( 351, 3, 1, 0 ),
	491	'DATESTRING' => array( 352, 1, 1, 0 ),
	492	'NUMBERSTRING' => array( 353, 2, 1, 0 ),
	493	'ROMAN' => array( 354, -1, 1, 0 ),
	494	'GETPIVOTDATA' => array( 358, -1, 0, 0 ),
	495	'HYPERLINK' => array( 359, -1, 1, 0 ),
	496	'PHONETIC' => array( 360, 1, 0, 0 ),
	497	'AVERAGEA' => array( 361, -1, 0, 0 ),
	498	'MAXA' => array( 362, -1, 0, 0 ),
	499	'MINA' => array( 363, -1, 0, 0 ),
	500	'STDEVPA' => array( 364, -1, 0, 0 ),
	501	'VARPA' => array( 365, -1, 0, 0 ),
	502	'STDEVA' => array( 366, -1, 0, 0 ),
	503	'VARA' => array( 367, -1, 0, 0 ),
	504	'BAHTTEXT' => array( 368, 1, 0, 0 ),
	505	);
	506	}
	507
	508	/**
	509	* Convert a token to the proper ptg value.
	510	*
	511	* @access private
	512	* @param mixed $token The token to convert.
	513	* @return mixed the converted token on success
	514	*/
	515	function _convert($token)
	516	{
	517	if (preg_match("/\"([^\"]\|\"\"){0,255}\"/", $token)) {
	518	return $this->_convertString($token);
	519
	520	} elseif (is_numeric($token)) {
	521	return $this->_convertNumber($token);
	522
	523	// match references like A1 or $A$1
	524	} elseif (preg_match('/^\$?([A-Ia-i]?[A-Za-z])\$?(\d+)$/',$token)) {
	525	return $this->_convertRef2d($token);
	526
	527	// match external references like Sheet1!A1 or Sheet1:Sheet2!A1 or Sheet1!$A$1 or Sheet1:Sheet2!$A$1
	528	} elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?[A-Ia-i]?[A-Za-z]\\$?(\d+)$/u",$token)) {
	529	return $this->_convertRef3d($token);
	530
	531	// match external references like 'Sheet1'!A1 or 'Sheet1:Sheet2'!A1 or 'Sheet1'!$A$1 or 'Sheet1:Sheet2'!$A$1
	532	} elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?[A-Ia-i]?[A-Za-z]\\$?(\d+)$/u",$token)) {
	533	return $this->_convertRef3d($token);
	534
	535	// match ranges like A1:B2 or $A$1:$B$2
	536	} elseif (preg_match('/^(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)\:(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)$/', $token)) {
	537	return $this->_convertRange2d($token);
	538
	539	// match external ranges like Sheet1!A1:B2 or Sheet1:Sheet2!A1:B2 or Sheet1!$A$1:$B$2 or Sheet1:Sheet2!$A$1:$B$2
	540	} elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?([A-Ia-i]?[A-Za-z])?\\$?(\d+)\:\\$?([A-Ia-i]?[A-Za-z])?\\$?(\d+)$/u",$token)) {
	541	return $this->_convertRange3d($token);
	542
	543	// match external ranges like 'Sheet1'!A1:B2 or 'Sheet1:Sheet2'!A1:B2 or 'Sheet1'!$A$1:$B$2 or 'Sheet1:Sheet2'!$A$1:$B$2
	544	} elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?([A-Ia-i]?[A-Za-z])?\\$?(\d+)\:\\$?([A-Ia-i]?[A-Za-z])?\\$?(\d+)$/u",$token)) {
	545	return $this->_convertRange3d($token);
	546
	547	// operators (including parentheses)
	548	} elseif (isset($this->ptg[$token])) {
	549	return pack("C", $this->ptg[$token]);
	550
	551	// match error codes
	552	} elseif (preg_match("/^#[A-Z0\/]{3,5}[!?]{1}$/", $token) or $token == '#N/A') {
	553	return $this->_convertError($token);
	554
	555	// commented so argument number can be processed correctly. See toReversePolish().
	556	/*elseif (preg_match("/[A-Z0-9\xc0-\xdc\.]+/",$token))
	557	{
	558	return($this->_convertFunction($token,$this->_func_args));
	559	}*/
	560
	561	// if it's an argument, ignore the token (the argument remains)
	562	} elseif ($token == 'arg') {
	563	return '';
	564	}
	565
	566	// TODO: use real error codes
	567	throw new PHPExcel_Writer_Exception("Unknown token $token");
	568	}
	569
	570	/**
	571	* Convert a number token to ptgInt or ptgNum
	572	*
	573	* @access private
	574	* @param mixed $num an integer or double for conversion to its ptg value
	575	*/
	576	function _convertNumber($num)
	577	{
	578	// Integer in the range 0..2**16-1
	579	if ((preg_match("/^\d+$/", $num)) and ($num <= 65535)) {
	580	return pack("Cv", $this->ptg['ptgInt'], $num);
	581	} else { // A float
	582	if (PHPExcel_Writer_Excel5_BIFFwriter::getByteOrder()) { // if it's Big Endian
	583	$num = strrev($num);
	584	}
	585	return pack("Cd", $this->ptg['ptgNum'], $num);
	586	}
	587	}
	588
	589	/**
	590	* Convert a string token to ptgStr
	591	*
	592	* @access private
	593	* @param string $string A string for conversion to its ptg value.
	594	* @return mixed the converted token on success
	595	*/
	596	function _convertString($string)
	597	{
	598	// chop away beggining and ending quotes
	599	$string = substr($string, 1, strlen($string) - 2);
	600	if (strlen($string) > 255) {
	601	throw new PHPExcel_Writer_Exception("String is too long");
	602	}
	603
	604	return pack('C', $this->ptg['ptgStr']) . PHPExcel_Shared_String::UTF8toBIFF8UnicodeShort($string);
	605	}
	606
	607	/**
	608	* Convert a function to a ptgFunc or ptgFuncVarV depending on the number of
	609	* args that it takes.
	610	*
	611	* @access private
	612	* @param string $token The name of the function for convertion to ptg value.
	613	* @param integer $num_args The number of arguments the function receives.
	614	* @return string The packed ptg for the function
	615	*/
	616	function _convertFunction($token, $num_args)
	617	{
	618	$args = $this->_functions[$token][1];
	619	// $volatile = $this->_functions[$token][3];
	620
	621	// Fixed number of args eg. TIME($i,$j,$k).
	622	if ($args >= 0) {
	623	return pack("Cv", $this->ptg['ptgFuncV'], $this->_functions[$token][0]);
	624	}
	625	// Variable number of args eg. SUM($i,$j,$k, ..).
	626	if ($args == -1) {
	627	return pack("CCv", $this->ptg['ptgFuncVarV'], $num_args, $this->_functions[$token][0]);
	628	}
	629	}
	630
	631	/**
	632	* Convert an Excel range such as A1:D4 to a ptgRefV.
	633	*
	634	* @access private
	635	* @param string $range An Excel range in the A1:A2
	636	* @param int $class
	637	*/
	638	function _convertRange2d($range, $class=0)
	639	{
	640
	641	// TODO: possible class value 0,1,2 check Formula.pm
	642	// Split the range into 2 cell refs
	643	if (preg_match('/^(\$)?([A-Ia-i]?[A-Za-z])(\$)?(\d+)\:(\$)?([A-Ia-i]?[A-Za-z])(\$)?(\d+)$/', $range)) {
	644	list($cell1, $cell2) = explode(':', $range);
	645	} else {
	646	// TODO: use real error codes
	647	throw new PHPExcel_Writer_Exception("Unknown range separator");
	648	}
	649
	650	// Convert the cell references
	651	list($row1, $col1) = $this->_cellToPackedRowcol($cell1);
	652	list($row2, $col2) = $this->_cellToPackedRowcol($cell2);
	653
	654	// The ptg value depends on the class of the ptg.
	655	if ($class == 0) {
	656	$ptgArea = pack("C", $this->ptg['ptgArea']);
	657	} elseif ($class == 1) {
	658	$ptgArea = pack("C", $this->ptg['ptgAreaV']);
	659	} elseif ($class == 2) {
	660	$ptgArea = pack("C", $this->ptg['ptgAreaA']);
	661	} else {
	662	// TODO: use real error codes
	663	throw new PHPExcel_Writer_Exception("Unknown class $class");
	664	}
	665	return $ptgArea . $row1 . $row2 . $col1. $col2;
	666	}
	667
	668	/**
	669	* Convert an Excel 3d range such as "Sheet1!A1:D4" or "Sheet1:Sheet2!A1:D4" to
	670	* a ptgArea3d.
	671	*
	672	* @access private
	673	* @param string $token An Excel range in the Sheet1!A1:A2 format.
	674	* @return mixed The packed ptgArea3d token on success.
	675	*/
	676	function _convertRange3d($token)
	677	{
	678	// $class = 0; // formulas like Sheet1!$A$1:$A$2 in list type data validation need this class (0x3B)
	679
	680	// Split the ref at the ! symbol
	681	list($ext_ref, $range) = explode('!', $token);
	682
	683	// Convert the external reference part (different for BIFF8)
	684	$ext_ref = $this->_getRefIndex($ext_ref);
	685
	686	// Split the range into 2 cell refs
	687	list($cell1, $cell2) = explode(':', $range);
	688
	689	// Convert the cell references
	690	if (preg_match("/^(\\$)?[A-Ia-i]?[A-Za-z](\\$)?(\d+)$/", $cell1)) {
	691	list($row1, $col1) = $this->_cellToPackedRowcol($cell1);
	692	list($row2, $col2) = $this->_cellToPackedRowcol($cell2);
	693	} else { // It's a rows range (like 26:27)
	694	list($row1, $col1, $row2, $col2) = $this->_rangeToPackedRange($cell1.':'.$cell2);
	695	}
	696
	697	// The ptg value depends on the class of the ptg.
	698	// if ($class == 0) {
	699	$ptgArea = pack("C", $this->ptg['ptgArea3d']);
	700	// } elseif ($class == 1) {
	701	// $ptgArea = pack("C", $this->ptg['ptgArea3dV']);
	702	// } elseif ($class == 2) {
	703	// $ptgArea = pack("C", $this->ptg['ptgArea3dA']);
	704	// } else {
	705	// throw new PHPExcel_Writer_Exception("Unknown class $class");
	706	// }
	707
	708	return $ptgArea . $ext_ref . $row1 . $row2 . $col1. $col2;
	709	}
	710
	711	/**
	712	* Convert an Excel reference such as A1, $B2, C$3 or $D$4 to a ptgRefV.
	713	*
	714	* @access private
	715	* @param string $cell An Excel cell reference
	716	* @return string The cell in packed() format with the corresponding ptg
	717	*/
	718	function _convertRef2d($cell)
	719	{
	720	// $class = 2; // as far as I know, this is magick.
	721
	722	// Convert the cell reference
	723	$cell_array = $this->_cellToPackedRowcol($cell);
	724	list($row, $col) = $cell_array;
	725
	726	// The ptg value depends on the class of the ptg.
	727	// if ($class == 0) {
	728	// $ptgRef = pack("C", $this->ptg['ptgRef']);
	729	// } elseif ($class == 1) {
	730	// $ptgRef = pack("C", $this->ptg['ptgRefV']);
	731	// } elseif ($class == 2) {
	732	$ptgRef = pack("C", $this->ptg['ptgRefA']);
	733	// } else {
	734	// // TODO: use real error codes
	735	// throw new PHPExcel_Writer_Exception("Unknown class $class");
	736	// }
	737	return $ptgRef.$row.$col;
	738	}
	739
	740	/**
	741	* Convert an Excel 3d reference such as "Sheet1!A1" or "Sheet1:Sheet2!A1" to a
	742	* ptgRef3d.
	743	*
	744	* @access private
	745	* @param string $cell An Excel cell reference
	746	* @return mixed The packed ptgRef3d token on success.
	747	*/
	748	function _convertRef3d($cell)
	749	{
	750	// $class = 2; // as far as I know, this is magick.
	751
	752	// Split the ref at the ! symbol
	753	list($ext_ref, $cell) = explode('!', $cell);
	754
	755	// Convert the external reference part (different for BIFF8)
	756	$ext_ref = $this->_getRefIndex($ext_ref);
	757
	758	// Convert the cell reference part
	759	list($row, $col) = $this->_cellToPackedRowcol($cell);
	760
	761	// The ptg value depends on the class of the ptg.
	762	// if ($class == 0) {
	763	// $ptgRef = pack("C", $this->ptg['ptgRef3d']);
	764	// } elseif ($class == 1) {
	765	// $ptgRef = pack("C", $this->ptg['ptgRef3dV']);
	766	// } elseif ($class == 2) {
	767	$ptgRef = pack("C", $this->ptg['ptgRef3dA']);
	768	// } else {
	769	// throw new PHPExcel_Writer_Exception("Unknown class $class");
	770	// }
	771
	772	return $ptgRef . $ext_ref. $row . $col;
	773	}
	774
	775	/**
	776	* Convert an error code to a ptgErr
	777	*
	778	* @access private
	779	* @param string $errorCode The error code for conversion to its ptg value
	780	* @return string The error code ptgErr
	781	*/
	782	function _convertError($errorCode)
	783	{
	784	switch ($errorCode) {
	785	case '#NULL!': return pack("C", 0x00);
	786	case '#DIV/0!': return pack("C", 0x07);
	787	case '#VALUE!': return pack("C", 0x0F);
	788	case '#REF!': return pack("C", 0x17);
	789	case '#NAME?': return pack("C", 0x1D);
	790	case '#NUM!': return pack("C", 0x24);
	791	case '#N/A': return pack("C", 0x2A);
	792	}
	793	return pack("C", 0xFF);
	794	}
	795
	796	/**
	797	* Convert the sheet name part of an external reference, for example "Sheet1" or
	798	* "Sheet1:Sheet2", to a packed structure.
	799	*
	800	* @access private
	801	* @param string $ext_ref The name of the external reference
	802	* @return string The reference index in packed() format
	803	*/
	804	function _packExtRef($ext_ref)
	805	{
	806	$ext_ref = preg_replace("/^'/", '', $ext_ref); // Remove leading ' if any.
	807	$ext_ref = preg_replace("/'$/", '', $ext_ref); // Remove trailing ' if any.
	808
	809	// Check if there is a sheet range eg., Sheet1:Sheet2.
	810	if (preg_match("/:/", $ext_ref)) {
	811	list($sheet_name1, $sheet_name2) = explode(':', $ext_ref);
	812
	813	$sheet1 = $this->_getSheetIndex($sheet_name1);
	814	if ($sheet1 == -1) {
	815	throw new PHPExcel_Writer_Exception("Unknown sheet name $sheet_name1 in formula");
	816	}
	817	$sheet2 = $this->_getSheetIndex($sheet_name2);
	818	if ($sheet2 == -1) {
	819	throw new PHPExcel_Writer_Exception("Unknown sheet name $sheet_name2 in formula");
	820	}
	821
	822	// Reverse max and min sheet numbers if necessary
	823	if ($sheet1 > $sheet2) {
	824	list($sheet1, $sheet2) = array($sheet2, $sheet1);
	825	}
	826	} else { // Single sheet name only.
	827	$sheet1 = $this->_getSheetIndex($ext_ref);
	828	if ($sheet1 == -1) {
	829	throw new PHPExcel_Writer_Exception("Unknown sheet name $ext_ref in formula");
	830	}
	831	$sheet2 = $sheet1;
	832	}
	833
	834	// References are stored relative to 0xFFFF.
	835	$offset = -1 - $sheet1;
	836
	837	return pack('vdvv', $offset, 0x00, $sheet1, $sheet2);
	838	}
	839
	840	/**
	841	* Look up the REF index that corresponds to an external sheet name
	842	* (or range). If it doesn't exist yet add it to the workbook's references
	843	* array. It assumes all sheet names given must exist.
	844	*
	845	* @access private
	846	* @param string $ext_ref The name of the external reference
	847	* @return mixed The reference index in packed() format on success
	848	*/
	849	function _getRefIndex($ext_ref)
	850	{
	851	$ext_ref = preg_replace("/^'/", '', $ext_ref); // Remove leading ' if any.
	852	$ext_ref = preg_replace("/'$/", '', $ext_ref); // Remove trailing ' if any.
	853	$ext_ref = str_replace('\'\'', '\'', $ext_ref); // Replace escaped '' with '
	854
	855	// Check if there is a sheet range eg., Sheet1:Sheet2.
	856	if (preg_match("/:/", $ext_ref)) {
	857	list($sheet_name1, $sheet_name2) = explode(':', $ext_ref);
	858
	859	$sheet1 = $this->_getSheetIndex($sheet_name1);
	860	if ($sheet1 == -1) {
	861	throw new PHPExcel_Writer_Exception("Unknown sheet name $sheet_name1 in formula");
	862	}
	863	$sheet2 = $this->_getSheetIndex($sheet_name2);
	864	if ($sheet2 == -1) {
	865	throw new PHPExcel_Writer_Exception("Unknown sheet name $sheet_name2 in formula");
	866	}
	867
	868	// Reverse max and min sheet numbers if necessary
	869	if ($sheet1 > $sheet2) {
	870	list($sheet1, $sheet2) = array($sheet2, $sheet1);
	871	}
	872	} else { // Single sheet name only.
	873	$sheet1 = $this->_getSheetIndex($ext_ref);
	874	if ($sheet1 == -1) {
	875	throw new PHPExcel_Writer_Exception("Unknown sheet name $ext_ref in formula");
	876	}
	877	$sheet2 = $sheet1;
	878	}
	879
	880	// assume all references belong to this document
	881	$supbook_index = 0x00;
	882	$ref = pack('vvv', $supbook_index, $sheet1, $sheet2);
	883	$total_references = count($this->_references);
	884	$index = -1;
	885	for ($i = 0; $i < $total_references; ++$i) {
	886	if ($ref == $this->_references[$i]) {
	887	$index = $i;
	888	break;
	889	}
	890	}
	891	// if REF was not found add it to references array
	892	if ($index == -1) {
	893	$this->_references[$total_references] = $ref;
	894	$index = $total_references;
	895	}
	896
	897	return pack('v', $index);
	898	}
	899
	900	/**
	901	* Look up the index that corresponds to an external sheet name. The hash of
	902	* sheet names is updated by the addworksheet() method of the
	903	* PHPExcel_Writer_Excel5_Workbook class.
	904	*
	905	* @access private
	906	* @param string $sheet_name Sheet name
	907	* @return integer The sheet index, -1 if the sheet was not found
	908	*/
	909	function _getSheetIndex($sheet_name)
	910	{
	911	if (!isset($this->_ext_sheets[$sheet_name])) {
	912	return -1;
	913	} else {
	914	return $this->_ext_sheets[$sheet_name];
	915	}
	916	}
	917
	918	/**
	919	* This method is used to update the array of sheet names. It is
	920	* called by the addWorksheet() method of the
	921	* PHPExcel_Writer_Excel5_Workbook class.
	922	*
	923	* @access public
	924	* @see PHPExcel_Writer_Excel5_Workbook::addWorksheet()
	925	* @param string $name The name of the worksheet being added
	926	* @param integer $index The index of the worksheet being added
	927	*/
	928	function setExtSheet($name, $index)
	929	{
	930	$this->_ext_sheets[$name] = $index;
	931	}
	932
	933	/**
	934	* pack() row and column into the required 3 or 4 byte format.
	935	*
	936	* @access private
	937	* @param string $cell The Excel cell reference to be packed
	938	* @return array Array containing the row and column in packed() format
	939	*/
	940	function _cellToPackedRowcol($cell)
	941	{
	942	$cell = strtoupper($cell);
	943	list($row, $col, $row_rel, $col_rel) = $this->_cellToRowcol($cell);
	944	if ($col >= 256) {
	945	throw new PHPExcel_Writer_Exception("Column in: $cell greater than 255");
	946	}
	947	if ($row >= 65536) {
	948	throw new PHPExcel_Writer_Exception("Row in: $cell greater than 65536 ");
	949	}
	950
	951	// Set the high bits to indicate if row or col are relative.
	952	$col \|= $col_rel << 14;
	953	$col \|= $row_rel << 15;
	954	$col = pack('v', $col);
	955
	956	$row = pack('v', $row);
	957
	958	return array($row, $col);
	959	}
	960
	961	/**
	962	* pack() row range into the required 3 or 4 byte format.
	963	* Just using maximum col/rows, which is probably not the correct solution
	964	*
	965	* @access private
	966	* @param string $range The Excel range to be packed
	967	* @return array Array containing (row1,col1,row2,col2) in packed() format
	968	*/
	969	function _rangeToPackedRange($range)
	970	{
	971	preg_match('/(\$)?(\d+)\:(\$)?(\d+)/', $range, $match);
	972	// return absolute rows if there is a $ in the ref
	973	$row1_rel = empty($match[1]) ? 1 : 0;
	974	$row1 = $match[2];
	975	$row2_rel = empty($match[3]) ? 1 : 0;
	976	$row2 = $match[4];
	977	// Convert 1-index to zero-index
	978	--$row1;
	979	--$row2;
	980	// Trick poor inocent Excel
	981	$col1 = 0;
	982	$col2 = 65535; // FIXME: maximum possible value for Excel 5 (change this!!!)
	983
	984	// FIXME: this changes for BIFF8
	985	if (($row1 >= 65536) or ($row2 >= 65536)) {
	986	throw new PHPExcel_Writer_Exception("Row in: $range greater than 65536 ");
	987	}
	988
	989	// Set the high bits to indicate if rows are relative.
	990	$col1 \|= $row1_rel << 15;
	991	$col2 \|= $row2_rel << 15;
	992	$col1 = pack('v', $col1);
	993	$col2 = pack('v', $col2);
	994
	995	$row1 = pack('v', $row1);
	996	$row2 = pack('v', $row2);
	997
	998	return array($row1, $col1, $row2, $col2);
	999	}
	1000
	1001	/**
	1002	* Convert an Excel cell reference such as A1 or $B2 or C$3 or $D$4 to a zero
	1003	* indexed row and column number. Also returns two (0,1) values to indicate
	1004	* whether the row or column are relative references.
	1005	*
	1006	* @access private
	1007	* @param string $cell The Excel cell reference in A1 format.
	1008	* @return array
	1009	*/
	1010	function _cellToRowcol($cell)
	1011	{
	1012	preg_match('/(\$)?([A-I]?[A-Z])(\$)?(\d+)/',$cell,$match);
	1013	// return absolute column if there is a $ in the ref
	1014	$col_rel = empty($match[1]) ? 1 : 0;
	1015	$col_ref = $match[2];
	1016	$row_rel = empty($match[3]) ? 1 : 0;
	1017	$row = $match[4];
	1018
	1019	// Convert base26 column string to a number.
	1020	$expn = strlen($col_ref) - 1;
	1021	$col = 0;
	1022	$col_ref_length = strlen($col_ref);
	1023	for ($i = 0; $i < $col_ref_length; ++$i) {
	1024	$col += (ord($col_ref{$i}) - 64) * pow(26, $expn);
	1025	--$expn;
	1026	}
	1027
	1028	// Convert 1-index to zero-index
	1029	--$row;
	1030	--$col;
	1031
	1032	return array($row, $col, $row_rel, $col_rel);
	1033	}
	1034
	1035	/**
	1036	* Advance to the next valid token.
	1037	*
	1038	* @access private
	1039	*/
	1040	function _advance()
	1041	{
	1042	$i = $this->_current_char;
	1043	$formula_length = strlen($this->_formula);
	1044	// eat up white spaces
	1045	if ($i < $formula_length) {
	1046	while ($this->_formula{$i} == " ") {
	1047	++$i;
	1048	}
	1049
	1050	if ($i < ($formula_length - 1)) {
	1051	$this->_lookahead = $this->_formula{$i+1};
	1052	}
	1053	$token = '';
	1054	}
	1055
	1056	while ($i < $formula_length) {
	1057	$token .= $this->_formula{$i};
	1058
	1059	if ($i < ($formula_length - 1)) {
	1060	$this->_lookahead = $this->_formula{$i+1};
	1061	} else {
	1062	$this->_lookahead = '';
	1063	}
	1064
	1065	if ($this->_match($token) != '') {
	1066	//if ($i < strlen($this->_formula) - 1) {
	1067	// $this->_lookahead = $this->_formula{$i+1};
	1068	//}
	1069	$this->_current_char = $i + 1;
	1070	$this->_current_token = $token;
	1071	return 1;
	1072	}
	1073
	1074	if ($i < ($formula_length - 2)) {
	1075	$this->_lookahead = $this->_formula{$i+2};
	1076	} else { // if we run out of characters _lookahead becomes empty
	1077	$this->_lookahead = '';
	1078	}
	1079	++$i;
	1080	}
	1081	//die("Lexical error ".$this->_current_char);
	1082	}
	1083
	1084	/**
	1085	* Checks if it's a valid token.
	1086	*
	1087	* @access private
	1088	* @param mixed $token The token to check.
	1089	* @return mixed The checked token or false on failure
	1090	*/
	1091	function _match($token)
	1092	{
	1093	switch($token) {
	1094	case "+":
	1095	case "-":
	1096	case "*":
	1097	case "/":
	1098	case "(":
	1099	case ")":
	1100	case ",":
	1101	case ";":
	1102	case ">=":
	1103	case "<=":
	1104	case "=":
	1105	case "<>":
	1106	case "^":
	1107	case "&":
	1108	case "%":
	1109	return $token;
	1110	break;
	1111	case ">":
	1112	if ($this->_lookahead == '=') { // it's a GE token
	1113	break;
	1114	}
	1115	return $token;
	1116	break;
	1117	case "<":
	1118	// it's a LE or a NE token
	1119	if (($this->_lookahead == '=') or ($this->_lookahead == '>')) {
	1120	break;
	1121	}
	1122	return $token;
	1123	break;
	1124	default:
	1125	// if it's a reference A1 or $A$1 or $A1 or A$1
	1126	if (preg_match('/^\$?[A-Ia-i]?[A-Za-z]\$?[0-9]+$/',$token) and
	1127	!preg_match("/[0-9]/",$this->_lookahead) and
	1128	($this->_lookahead != ':') and ($this->_lookahead != '.') and
	1129	($this->_lookahead != '!'))
	1130	{
	1131	return $token;
	1132	}
	1133	// If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1 or Sheet1!$A$1 or Sheet1:Sheet2!$A$1)
	1134	elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?[A-Ia-i]?[A-Za-z]\\$?[0-9]+$/u",$token) and
	1135	!preg_match("/[0-9]/",$this->_lookahead) and
	1136	($this->_lookahead != ':') and ($this->_lookahead != '.'))
	1137	{
	1138	return $token;
	1139	}
	1140	// If it's an external reference ('Sheet1'!A1 or 'Sheet1:Sheet2'!A1 or 'Sheet1'!$A$1 or 'Sheet1:Sheet2'!$A$1)
	1141	elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?[A-Ia-i]?[A-Za-z]\\$?[0-9]+$/u",$token) and
	1142	!preg_match("/[0-9]/",$this->_lookahead) and
	1143	($this->_lookahead != ':') and ($this->_lookahead != '.'))
	1144	{
	1145	return $token;
	1146	}
	1147	// if it's a range A1:A2 or $A$1:$A$2
	1148	elseif (preg_match('/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+:(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/', $token) and
	1149	!preg_match("/[0-9]/",$this->_lookahead))
	1150	{
	1151	return $token;
	1152	}
	1153	// If it's an external range like Sheet1!A1:B2 or Sheet1:Sheet2!A1:B2 or Sheet1!$A$1:$B$2 or Sheet1:Sheet2!$A$1:$B$2
	1154	elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+:\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+$/u",$token) and
	1155	!preg_match("/[0-9]/",$this->_lookahead))
	1156	{
	1157	return $token;
	1158	}
	1159	// If it's an external range like 'Sheet1'!A1:B2 or 'Sheet1:Sheet2'!A1:B2 or 'Sheet1'!$A$1:$B$2 or 'Sheet1:Sheet2'!$A$1:$B$2
	1160	elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+:\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+$/u",$token) and
	1161	!preg_match("/[0-9]/",$this->_lookahead))
	1162	{
	1163	return $token;
	1164	}
	1165	// If it's a number (check that it's not a sheet name or range)
	1166	elseif (is_numeric($token) and
	1167	(!is_numeric($token.$this->_lookahead) or ($this->_lookahead == '')) and
	1168	($this->_lookahead != '!') and ($this->_lookahead != ':'))
	1169	{
	1170	return $token;
	1171	}
	1172	// If it's a string (of maximum 255 characters)
	1173	elseif (preg_match("/\"([^\"]\|\"\"){0,255}\"/",$token) and $this->_lookahead != '"' and (substr_count($token, '"')%2 == 0))
	1174	{
	1175	return $token;
	1176	}
	1177	// If it's an error code
	1178	elseif (preg_match("/^#[A-Z0\/]{3,5}[!?]{1}$/", $token) or $token == '#N/A')
	1179	{
	1180	return $token;
	1181	}
	1182	// if it's a function call
	1183	elseif (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/i",$token) and ($this->_lookahead == "("))
	1184	{
	1185	return $token;
	1186	}
	1187	// It's an argument of some description (e.g. a named range),
	1188	// precise nature yet to be determined
	1189	elseif(substr($token,-1) == ')') {
	1190	return $token;
	1191	}
	1192	return '';
	1193	}
	1194	}
	1195
	1196	/**
	1197	* The parsing method. It parses a formula.
	1198	*
	1199	* @access public
	1200	* @param string $formula The formula to parse, without the initial equal
	1201	* sign (=).
	1202	* @return mixed true on success
	1203	*/
	1204	function parse($formula)
	1205	{
	1206	$this->_current_char = 0;
	1207	$this->_formula = $formula;
	1208	$this->_lookahead = isset($formula{1}) ? $formula{1} : '';
	1209	$this->_advance();
	1210	$this->_parse_tree = $this->_condition();
	1211	return true;
	1212	}
	1213
	1214	/**
	1215	* It parses a condition. It assumes the following rule:
	1216	* Cond -> Expr [(">" \| "<") Expr]
	1217	*
	1218	* @access private
	1219	* @return mixed The parsed ptg'd tree on success
	1220	*/
	1221	function _condition()
	1222	{
	1223	$result = $this->_expression();
	1224	if ($this->_current_token == "<") {
	1225	$this->_advance();
	1226	$result2 = $this->_expression();
	1227	$result = $this->_createTree('ptgLT', $result, $result2);
	1228	} elseif ($this->_current_token == ">") {
	1229	$this->_advance();
	1230	$result2 = $this->_expression();
	1231	$result = $this->_createTree('ptgGT', $result, $result2);
	1232	} elseif ($this->_current_token == "<=") {
	1233	$this->_advance();
	1234	$result2 = $this->_expression();
	1235	$result = $this->_createTree('ptgLE', $result, $result2);
	1236	} elseif ($this->_current_token == ">=") {
	1237	$this->_advance();
	1238	$result2 = $this->_expression();
	1239	$result = $this->_createTree('ptgGE', $result, $result2);
	1240	} elseif ($this->_current_token == "=") {
	1241	$this->_advance();
	1242	$result2 = $this->_expression();
	1243	$result = $this->_createTree('ptgEQ', $result, $result2);
	1244	} elseif ($this->_current_token == "<>") {
	1245	$this->_advance();
	1246	$result2 = $this->_expression();
	1247	$result = $this->_createTree('ptgNE', $result, $result2);
	1248	} elseif ($this->_current_token == "&") {
	1249	$this->_advance();
	1250	$result2 = $this->_expression();
	1251	$result = $this->_createTree('ptgConcat', $result, $result2);
	1252	}
	1253	return $result;
	1254	}
	1255
	1256	/**
	1257	* It parses a expression. It assumes the following rule:
	1258	* Expr -> Term [("+" \| "-") Term]
	1259	* -> "string"
	1260	* -> "-" Term : Negative value
	1261	* -> "+" Term : Positive value
	1262	* -> Error code
	1263	*
	1264	* @access private
	1265	* @return mixed The parsed ptg'd tree on success
	1266	*/
	1267	function _expression()
	1268	{
	1269	// If it's a string return a string node
	1270	if (preg_match("/\"([^\"]\|\"\"){0,255}\"/", $this->_current_token)) {
	1271	$tmp = str_replace('""', '"', $this->_current_token);
	1272	if (($tmp == '"') \|\| ($tmp == '')) $tmp = '""'; // Trap for "" that has been used for an empty string
	1273	$result = $this->_createTree($tmp, '', '');
	1274	$this->_advance();
	1275	return $result;
	1276	// If it's an error code
	1277	} elseif (preg_match("/^#[A-Z0\/]{3,5}[!?]{1}$/", $this->_current_token) or $this->_current_token == '#N/A'){
	1278	$result = $this->_createTree($this->_current_token, 'ptgErr', '');
	1279	$this->_advance();
	1280	return $result;
	1281	// If it's a negative value
	1282	} elseif ($this->_current_token == "-") {
	1283	// catch "-" Term
	1284	$this->_advance();
	1285	$result2 = $this->_expression();
	1286	$result = $this->_createTree('ptgUminus', $result2, '');
	1287	return $result;
	1288	// If it's a positive value
	1289	} elseif ($this->_current_token == "+") {
	1290	// catch "+" Term
	1291	$this->_advance();
	1292	$result2 = $this->_expression();
	1293	$result = $this->_createTree('ptgUplus', $result2, '');
	1294	return $result;
	1295	}
	1296	$result = $this->_term();
	1297	while (($this->_current_token == "+") or
	1298	($this->_current_token == "-") or
	1299	($this->_current_token == "^")) {
	1300	/**/
	1301	if ($this->_current_token == "+") {
	1302	$this->_advance();
	1303	$result2 = $this->_term();
	1304	$result = $this->_createTree('ptgAdd', $result, $result2);
	1305	} elseif ($this->_current_token == "-") {
	1306	$this->_advance();
	1307	$result2 = $this->_term();
	1308	$result = $this->_createTree('ptgSub', $result, $result2);
	1309	} else {
	1310	$this->_advance();
	1311	$result2 = $this->_term();
	1312	$result = $this->_createTree('ptgPower', $result, $result2);
	1313	}
	1314	}
	1315	return $result;
	1316	}
	1317
	1318	/**
	1319	* This function just introduces a ptgParen element in the tree, so that Excel
	1320	* doesn't get confused when working with a parenthesized formula afterwards.
	1321	*
	1322	* @access private
	1323	* @see _fact()
	1324	* @return array The parsed ptg'd tree
	1325	*/
	1326	function _parenthesizedExpression()
	1327	{
	1328	$result = $this->_createTree('ptgParen', $this->_expression(), '');
	1329	return $result;
	1330	}
	1331
	1332	/**
	1333	* It parses a term. It assumes the following rule:
	1334	* Term -> Fact [("*" \| "/") Fact]
	1335	*
	1336	* @access private
	1337	* @return mixed The parsed ptg'd tree on success
	1338	*/
	1339	function _term()
	1340	{
	1341	$result = $this->_fact();
	1342	while (($this->_current_token == "*") or
	1343	($this->_current_token == "/")) {
	1344	/**/
	1345	if ($this->_current_token == "*") {
	1346	$this->_advance();
	1347	$result2 = $this->_fact();
	1348	$result = $this->_createTree('ptgMul', $result, $result2);
	1349	} else {
	1350	$this->_advance();
	1351	$result2 = $this->_fact();
	1352	$result = $this->_createTree('ptgDiv', $result, $result2);
	1353	}
	1354	}
	1355	return $result;
	1356	}
	1357
	1358	/**
	1359	* It parses a factor. It assumes the following rule:
	1360	* Fact -> ( Expr )
	1361	* \| CellRef
	1362	* \| CellRange
	1363	* \| Number
	1364	* \| Function
	1365	*
	1366	* @access private
	1367	* @return mixed The parsed ptg'd tree on success
	1368	*/
	1369	function _fact()
	1370	{
	1371	if ($this->_current_token == "(") {
	1372	$this->_advance(); // eat the "("
	1373	$result = $this->_parenthesizedExpression();
	1374	if ($this->_current_token != ")") {
	1375	throw new PHPExcel_Writer_Exception("')' token expected.");
	1376	}
	1377	$this->_advance(); // eat the ")"
	1378	return $result;
	1379	}
	1380	// if it's a reference
	1381	if (preg_match('/^\$?[A-Ia-i]?[A-Za-z]\$?[0-9]+$/',$this->_current_token))
	1382	{
	1383	$result = $this->_createTree($this->_current_token, '', '');
	1384	$this->_advance();
	1385	return $result;
	1386	}
	1387	// If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1 or Sheet1!$A$1 or Sheet1:Sheet2!$A$1)
	1388	elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?[A-Ia-i]?[A-Za-z]\\$?[0-9]+$/u",$this->_current_token))
	1389	{
	1390	$result = $this->_createTree($this->_current_token, '', '');
	1391	$this->_advance();
	1392	return $result;
	1393	}
	1394	// If it's an external reference ('Sheet1'!A1 or 'Sheet1:Sheet2'!A1 or 'Sheet1'!$A$1 or 'Sheet1:Sheet2'!$A$1)
	1395	elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?[A-Ia-i]?[A-Za-z]\\$?[0-9]+$/u",$this->_current_token))
	1396	{
	1397	$result = $this->_createTree($this->_current_token, '', '');
	1398	$this->_advance();
	1399	return $result;
	1400	}
	1401	// if it's a range A1:B2 or $A$1:$B$2
	1402	elseif (preg_match('/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+:(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/',$this->_current_token) or
	1403	preg_match('/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+\.\.(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/',$this->_current_token))
	1404	{
	1405	// must be an error?
	1406	$result = $this->_createTree($this->_current_token, '', '');
	1407	$this->_advance();
	1408	return $result;
	1409	}
	1410	// If it's an external range (Sheet1!A1:B2 or Sheet1:Sheet2!A1:B2 or Sheet1!$A$1:$B$2 or Sheet1:Sheet2!$A$1:$B$2)
	1411	elseif (preg_match("/^" . self::REGEX_SHEET_TITLE_UNQUOTED . "(\:" . self::REGEX_SHEET_TITLE_UNQUOTED . ")?\!\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+:\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+$/u",$this->_current_token))
	1412	{
	1413	// must be an error?
	1414	//$result = $this->_current_token;
	1415	$result = $this->_createTree($this->_current_token, '', '');
	1416	$this->_advance();
	1417	return $result;
	1418	}
	1419	// If it's an external range ('Sheet1'!A1:B2 or 'Sheet1'!A1:B2 or 'Sheet1'!$A$1:$B$2 or 'Sheet1'!$A$1:$B$2)
	1420	elseif (preg_match("/^'" . self::REGEX_SHEET_TITLE_QUOTED . "(\:" . self::REGEX_SHEET_TITLE_QUOTED . ")?'\!\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+:\\$?([A-Ia-i]?[A-Za-z])?\\$?[0-9]+$/u",$this->_current_token))
	1421	{
	1422	// must be an error?
	1423	//$result = $this->_current_token;
	1424	$result = $this->_createTree($this->_current_token, '', '');
	1425	$this->_advance();
	1426	return $result;
	1427	}
	1428	// If it's a number or a percent
	1429	elseif (is_numeric($this->_current_token))
	1430	{
	1431	if($this->_lookahead == '%'){
	1432	$result = $this->_createTree('ptgPercent', $this->_current_token, '');
	1433	} else {
	1434	$result = $this->_createTree($this->_current_token, '', '');
	1435	}
	1436	$this->_advance();
	1437	return $result;
	1438	}
	1439	// if it's a function call
	1440	elseif (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/i",$this->_current_token))
	1441	{
	1442	$result = $this->_func();
	1443	return $result;
	1444	}
	1445	throw new PHPExcel_Writer_Exception("Syntax error: ".$this->_current_token.
	1446	", lookahead: ".$this->_lookahead.
	1447	", current char: ".$this->_current_char);
	1448	}
	1449
	1450	/**
	1451	* It parses a function call. It assumes the following rule:
	1452	* Func -> ( Expr [,Expr]* )
	1453	*
	1454	* @access private
	1455	* @return mixed The parsed ptg'd tree on success
	1456	*/
	1457	function _func()
	1458	{
	1459	$num_args = 0; // number of arguments received
	1460	$function = strtoupper($this->_current_token);
	1461	$result = ''; // initialize result
	1462	$this->_advance();
	1463	$this->_advance(); // eat the "("
	1464	while ($this->_current_token != ')') {
	1465	/**/
	1466	if ($num_args > 0) {
	1467	if ($this->_current_token == "," or
	1468	$this->_current_token == ";")
	1469	{
	1470	$this->_advance(); // eat the "," or ";"
	1471	} else {
	1472	throw new PHPExcel_Writer_Exception("Syntax error: comma expected in ".
	1473	"function $function, arg #{$num_args}");
	1474	}
	1475	$result2 = $this->_condition();
	1476	$result = $this->_createTree('arg', $result, $result2);
	1477	} else { // first argument
	1478	$result2 = $this->_condition();
	1479	$result = $this->_createTree('arg', '', $result2);
	1480	}
	1481	++$num_args;
	1482	}
	1483	if (!isset($this->_functions[$function])) {
	1484	throw new PHPExcel_Writer_Exception("Function $function() doesn't exist");
	1485	}
	1486	$args = $this->_functions[$function][1];
	1487	// If fixed number of args eg. TIME($i,$j,$k). Check that the number of args is valid.
	1488	if (($args >= 0) and ($args != $num_args)) {
	1489	throw new PHPExcel_Writer_Exception("Incorrect number of arguments in function $function() ");
	1490	}
	1491
	1492	$result = $this->_createTree($function, $result, $num_args);
	1493	$this->_advance(); // eat the ")"
	1494	return $result;
	1495	}
	1496
	1497	/**
	1498	* Creates a tree. In fact an array which may have one or two arrays (sub-trees)
	1499	* as elements.
	1500	*
	1501	* @access private
	1502	* @param mixed $value The value of this node.
	1503	* @param mixed $left The left array (sub-tree) or a final node.
	1504	* @param mixed $right The right array (sub-tree) or a final node.
	1505	* @return array A tree
	1506	*/
	1507	function _createTree($value, $left, $right)
	1508	{
	1509	return array('value' => $value, 'left' => $left, 'right' => $right);
	1510	}
	1511
	1512	/**
	1513	* Builds a string containing the tree in reverse polish notation (What you
	1514	* would use in a HP calculator stack).
	1515	* The following tree:
	1516	*
	1517	* +
	1518	* / \
	1519	* 2 3
	1520	*
	1521	* produces: "23+"
	1522	*
	1523	* The following tree:
	1524	*
	1525	* +
	1526	* / \
	1527	* 3 *
	1528	* / \
	1529	* 6 A1
	1530	*
	1531	* produces: "36A1*+"
	1532	*
	1533	* In fact all operands, functions, references, etc... are written as ptg's
	1534	*
	1535	* @access public
	1536	* @param array $tree The optional tree to convert.
	1537	* @return string The tree in reverse polish notation
	1538	*/
	1539	function toReversePolish($tree = array())
	1540	{
	1541	$polish = ""; // the string we are going to return
	1542	if (empty($tree)) { // If it's the first call use _parse_tree
	1543	$tree = $this->_parse_tree;
	1544	}
	1545
	1546	if (is_array($tree['left'])) {
	1547	$converted_tree = $this->toReversePolish($tree['left']);
	1548	$polish .= $converted_tree;
	1549	} elseif ($tree['left'] != '') { // It's a final node
	1550	$converted_tree = $this->_convert($tree['left']);
	1551	$polish .= $converted_tree;
	1552	}
	1553	if (is_array($tree['right'])) {
	1554	$converted_tree = $this->toReversePolish($tree['right']);
	1555	$polish .= $converted_tree;
	1556	} elseif ($tree['right'] != '') { // It's a final node
	1557	$converted_tree = $this->_convert($tree['right']);
	1558	$polish .= $converted_tree;
	1559	}
	1560	// if it's a function convert it here (so we can set it's arguments)
	1561	if (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/",$tree['value']) and
	1562	!preg_match('/^([A-Ia-i]?[A-Za-z])(\d+)$/',$tree['value']) and
	1563	!preg_match("/^[A-Ia-i]?[A-Za-z](\d+)\.\.[A-Ia-i]?[A-Za-z](\d+)$/",$tree['value']) and
	1564	!is_numeric($tree['value']) and
	1565	!isset($this->ptg[$tree['value']]))
	1566	{
	1567	// left subtree for a function is always an array.
	1568	if ($tree['left'] != '') {
	1569	$left_tree = $this->toReversePolish($tree['left']);
	1570	} else {
	1571	$left_tree = '';
	1572	}
	1573	// add it's left subtree and return.
	1574	return $left_tree.$this->_convertFunction($tree['value'], $tree['right']);
	1575	} else {
	1576	$converted_tree = $this->_convert($tree['value']);
	1577	}
	1578	$polish .= $converted_tree;
	1579	return $polish;
	1580	}
	1581
	1582	}

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source: sourcecode/application/libraries/PHPExcel/Writer/Excel5/Parser.php @ 1

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