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<?php/*** Class for parsing Excel formulas** License Information:** Spreadsheet_Excel_Writer: A library for generating Excel Spreadsheets* Copyright (c) 2002-2003 Xavier Noguer xnoguer@rezebra.com** This library is free software; you can redistribute it and/or* modify it under the terms of the GNU Lesser General Public* License as published by the Free Software Foundation; either* version 2.1 of the License, or (at your option) any later version.** This library is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU* Lesser General Public License for more details.** You should have received a copy of the GNU Lesser General Public* License along with this library; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA*//*** @const SPREADSHEET_EXCEL_WRITER_ADD token identifier for character "+"*/define('SPREADSHEET_EXCEL_WRITER_ADD', "+");/*** @const SPREADSHEET_EXCEL_WRITER_SUB token identifier for character "-"*/define('SPREADSHEET_EXCEL_WRITER_SUB', "-");/*** @const SPREADSHEET_EXCEL_WRITER_MUL token identifier for character "*"*/define('SPREADSHEET_EXCEL_WRITER_MUL', "*");/*** @const SPREADSHEET_EXCEL_WRITER_DIV token identifier for character "/"*/define('SPREADSHEET_EXCEL_WRITER_DIV', "/");/*** @const SPREADSHEET_EXCEL_WRITER_OPEN token identifier for character "("*/define('SPREADSHEET_EXCEL_WRITER_OPEN', "(");/*** @const SPREADSHEET_EXCEL_WRITER_CLOSE token identifier for character ")"*/define('SPREADSHEET_EXCEL_WRITER_CLOSE', ")");/*** @const SPREADSHEET_EXCEL_WRITER_COMA token identifier for character ","*/define('SPREADSHEET_EXCEL_WRITER_COMA', ",");/*** @const SPREADSHEET_EXCEL_WRITER_SEMICOLON token identifier for character ";"*/define('SPREADSHEET_EXCEL_WRITER_SEMICOLON', ";");/*** @const SPREADSHEET_EXCEL_WRITER_GT token identifier for character ">"*/define('SPREADSHEET_EXCEL_WRITER_GT', ">");/*** @const SPREADSHEET_EXCEL_WRITER_LT token identifier for character "<"*/define('SPREADSHEET_EXCEL_WRITER_LT', "<");/*** @const SPREADSHEET_EXCEL_WRITER_LE token identifier for character "<="*/define('SPREADSHEET_EXCEL_WRITER_LE', "<=");/*** @const SPREADSHEET_EXCEL_WRITER_GE token identifier for character ">="*/define('SPREADSHEET_EXCEL_WRITER_GE', ">=");/*** @const SPREADSHEET_EXCEL_WRITER_EQ token identifier for character "="*/define('SPREADSHEET_EXCEL_WRITER_EQ', "=");/*** @const SPREADSHEET_EXCEL_WRITER_NE token identifier for character "<>"*/define('SPREADSHEET_EXCEL_WRITER_NE', "<>");/*** * @const SPREADSHEET_EXCEL_WRITER_CONCAT token identifier for character "&"*/define('SPREADSHEET_EXCEL_WRITER_CONCAT', "&");require_once 'PEAR.php';/*** Class for parsing Excel formulas** @author Xavier Noguer <xnoguer@rezebra.com>* @category FileFormats* @package Spreadsheet_Excel_Writer*/class Spreadsheet_Excel_Writer_Parser extends PEAR{/*** The index of the character we are currently looking at* @var integer*/var $_current_char;/*** The token we are working on.* @var string*/var $_current_token;/*** The formula to parse* @var string*/var $_formula;/*** The character ahead of the current char* @var string*/var $_lookahead;/*** The parse tree to be generated* @var string*/var $_parse_tree;/*** The byte order. 1 => big endian, 0 => little endian.* @var integer*/var $_byte_order;/*** Array of external sheets* @var array*/var $_ext_sheets;/*** Array of sheet references in the form of REF structures* @var array*/var $_references;/*** The BIFF version for the workbook* @var integer*/var $_BIFF_version;/*** The class constructor** @param integer $byte_order The byte order (Little endian or Big endian) of the architecture(optional). 1 => big endian, 0 (default) little endian.*/function Spreadsheet_Excel_Writer_Parser($byte_order, $biff_version){$this->_current_char = 0;$this->_BIFF_version = $biff_version;$this->_current_token = ''; // The token we are working on.$this->_formula = ''; // The formula to parse.$this->_lookahead = ''; // The character ahead of the current char.$this->_parse_tree = ''; // The parse tree to be generated.$this->_initializeHashes(); // Initialize the hashes: ptg's and function's ptg's$this->_byte_order = $byte_order; // Little Endian or Big Endian$this->_ext_sheets = array();$this->_references = array();}/*** Initialize the ptg and function hashes.** @access private*/function _initializeHashes(){// The Excel ptg indices$this->ptg = array('ptgExp' => 0x01,'ptgTbl' => 0x02,'ptgAdd' => 0x03,'ptgSub' => 0x04,'ptgMul' => 0x05,'ptgDiv' => 0x06,'ptgPower' => 0x07,'ptgConcat' => 0x08,'ptgLT' => 0x09,'ptgLE' => 0x0A,'ptgEQ' => 0x0B,'ptgGE' => 0x0C,'ptgGT' => 0x0D,'ptgNE' => 0x0E,'ptgIsect' => 0x0F,'ptgUnion' => 0x10,'ptgRange' => 0x11,'ptgUplus' => 0x12,'ptgUminus' => 0x13,'ptgPercent' => 0x14,'ptgParen' => 0x15,'ptgMissArg' => 0x16,'ptgStr' => 0x17,'ptgAttr' => 0x19,'ptgSheet' => 0x1A,'ptgEndSheet' => 0x1B,'ptgErr' => 0x1C,'ptgBool' => 0x1D,'ptgInt' => 0x1E,'ptgNum' => 0x1F,'ptgArray' => 0x20,'ptgFunc' => 0x21,'ptgFuncVar' => 0x22,'ptgName' => 0x23,'ptgRef' => 0x24,'ptgArea' => 0x25,'ptgMemArea' => 0x26,'ptgMemErr' => 0x27,'ptgMemNoMem' => 0x28,'ptgMemFunc' => 0x29,'ptgRefErr' => 0x2A,'ptgAreaErr' => 0x2B,'ptgRefN' => 0x2C,'ptgAreaN' => 0x2D,'ptgMemAreaN' => 0x2E,'ptgMemNoMemN' => 0x2F,'ptgNameX' => 0x39,'ptgRef3d' => 0x3A,'ptgArea3d' => 0x3B,'ptgRefErr3d' => 0x3C,'ptgAreaErr3d' => 0x3D,'ptgArrayV' => 0x40,'ptgFuncV' => 0x41,'ptgFuncVarV' => 0x42,'ptgNameV' => 0x43,'ptgRefV' => 0x44,'ptgAreaV' => 0x45,'ptgMemAreaV' => 0x46,'ptgMemErrV' => 0x47,'ptgMemNoMemV' => 0x48,'ptgMemFuncV' => 0x49,'ptgRefErrV' => 0x4A,'ptgAreaErrV' => 0x4B,'ptgRefNV' => 0x4C,'ptgAreaNV' => 0x4D,'ptgMemAreaNV' => 0x4E,'ptgMemNoMemN' => 0x4F,'ptgFuncCEV' => 0x58,'ptgNameXV' => 0x59,'ptgRef3dV' => 0x5A,'ptgArea3dV' => 0x5B,'ptgRefErr3dV' => 0x5C,'ptgAreaErr3d' => 0x5D,'ptgArrayA' => 0x60,'ptgFuncA' => 0x61,'ptgFuncVarA' => 0x62,'ptgNameA' => 0x63,'ptgRefA' => 0x64,'ptgAreaA' => 0x65,'ptgMemAreaA' => 0x66,'ptgMemErrA' => 0x67,'ptgMemNoMemA' => 0x68,'ptgMemFuncA' => 0x69,'ptgRefErrA' => 0x6A,'ptgAreaErrA' => 0x6B,'ptgRefNA' => 0x6C,'ptgAreaNA' => 0x6D,'ptgMemAreaNA' => 0x6E,'ptgMemNoMemN' => 0x6F,'ptgFuncCEA' => 0x78,'ptgNameXA' => 0x79,'ptgRef3dA' => 0x7A,'ptgArea3dA' => 0x7B,'ptgRefErr3dA' => 0x7C,'ptgAreaErr3d' => 0x7D);// Thanks to Michael Meeks and Gnumeric for the initial arg values.//// The following hash was generated by "function_locale.pl" in the distro.// Refer to function_locale.pl for non-English function names.//// The array elements are as follow:// ptg: The Excel function ptg code.// args: The number of arguments that the function takes:// >=0 is a fixed number of arguments.// -1 is a variable number of arguments.// class: The reference, value or array class of the function args.// vol: The function is volatile.//$this->_functions = array(// function ptg args class vol'COUNT' => array( 0, -1, 0, 0 ),'IF' => array( 1, -1, 1, 0 ),'ISNA' => array( 2, 1, 1, 0 ),'ISERROR' => array( 3, 1, 1, 0 ),'SUM' => array( 4, -1, 0, 0 ),'AVERAGE' => array( 5, -1, 0, 0 ),'MIN' => array( 6, -1, 0, 0 ),'MAX' => array( 7, -1, 0, 0 ),'ROW' => array( 8, -1, 0, 0 ),'COLUMN' => array( 9, -1, 0, 0 ),'NA' => array( 10, 0, 0, 0 ),'NPV' => array( 11, -1, 1, 0 ),'STDEV' => array( 12, -1, 0, 0 ),'DOLLAR' => array( 13, -1, 1, 0 ),'FIXED' => array( 14, -1, 1, 0 ),'SIN' => array( 15, 1, 1, 0 ),'COS' => array( 16, 1, 1, 0 ),'TAN' => array( 17, 1, 1, 0 ),'ATAN' => array( 18, 1, 1, 0 ),'PI' => array( 19, 0, 1, 0 ),'SQRT' => array( 20, 1, 1, 0 ),'EXP' => array( 21, 1, 1, 0 ),'LN' => array( 22, 1, 1, 0 ),'LOG10' => array( 23, 1, 1, 0 ),'ABS' => array( 24, 1, 1, 0 ),'INT' => array( 25, 1, 1, 0 ),'SIGN' => array( 26, 1, 1, 0 ),'ROUND' => array( 27, 2, 1, 0 ),'LOOKUP' => array( 28, -1, 0, 0 ),'INDEX' => array( 29, -1, 0, 1 ),'REPT' => array( 30, 2, 1, 0 ),'MID' => array( 31, 3, 1, 0 ),'LEN' => array( 32, 1, 1, 0 ),'VALUE' => array( 33, 1, 1, 0 ),'TRUE' => array( 34, 0, 1, 0 ),'FALSE' => array( 35, 0, 1, 0 ),'AND' => array( 36, -1, 0, 0 ),'OR' => array( 37, -1, 0, 0 ),'NOT' => array( 38, 1, 1, 0 ),'MOD' => array( 39, 2, 1, 0 ),'DCOUNT' => array( 40, 3, 0, 0 ),'DSUM' => array( 41, 3, 0, 0 ),'DAVERAGE' => array( 42, 3, 0, 0 ),'DMIN' => array( 43, 3, 0, 0 ),'DMAX' => array( 44, 3, 0, 0 ),'DSTDEV' => array( 45, 3, 0, 0 ),'VAR' => array( 46, -1, 0, 0 ),'DVAR' => array( 47, 3, 0, 0 ),'TEXT' => array( 48, 2, 1, 0 ),'LINEST' => array( 49, -1, 0, 0 ),'TREND' => array( 50, -1, 0, 0 ),'LOGEST' => array( 51, -1, 0, 0 ),'GROWTH' => array( 52, -1, 0, 0 ),'PV' => array( 56, -1, 1, 0 ),'FV' => array( 57, -1, 1, 0 ),'NPER' => array( 58, -1, 1, 0 ),'PMT' => array( 59, -1, 1, 0 ),'RATE' => array( 60, -1, 1, 0 ),'MIRR' => array( 61, 3, 0, 0 ),'IRR' => array( 62, -1, 0, 0 ),'RAND' => array( 63, 0, 1, 1 ),'MATCH' => array( 64, -1, 0, 0 ),'DATE' => array( 65, 3, 1, 0 ),'TIME' => array( 66, 3, 1, 0 ),'DAY' => array( 67, 1, 1, 0 ),'MONTH' => array( 68, 1, 1, 0 ),'YEAR' => array( 69, 1, 1, 0 ),'WEEKDAY' => array( 70, -1, 1, 0 ),'HOUR' => array( 71, 1, 1, 0 ),'MINUTE' => array( 72, 1, 1, 0 ),'SECOND' => array( 73, 1, 1, 0 ),'NOW' => array( 74, 0, 1, 1 ),'AREAS' => array( 75, 1, 0, 1 ),'ROWS' => array( 76, 1, 0, 1 ),'COLUMNS' => array( 77, 1, 0, 1 ),'OFFSET' => array( 78, -1, 0, 1 ),'SEARCH' => array( 82, -1, 1, 0 ),'TRANSPOSE' => array( 83, 1, 1, 0 ),'TYPE' => array( 86, 1, 1, 0 ),'ATAN2' => array( 97, 2, 1, 0 ),'ASIN' => array( 98, 1, 1, 0 ),'ACOS' => array( 99, 1, 1, 0 ),'CHOOSE' => array( 100, -1, 1, 0 ),'HLOOKUP' => array( 101, -1, 0, 0 ),'VLOOKUP' => array( 102, -1, 0, 0 ),'ISREF' => array( 105, 1, 0, 0 ),'LOG' => array( 109, -1, 1, 0 ),'CHAR' => array( 111, 1, 1, 0 ),'LOWER' => array( 112, 1, 1, 0 ),'UPPER' => array( 113, 1, 1, 0 ),'PROPER' => array( 114, 1, 1, 0 ),'LEFT' => array( 115, -1, 1, 0 ),'RIGHT' => array( 116, -1, 1, 0 ),'EXACT' => array( 117, 2, 1, 0 ),'TRIM' => array( 118, 1, 1, 0 ),'REPLACE' => array( 119, 4, 1, 0 ),'SUBSTITUTE' => array( 120, -1, 1, 0 ),'CODE' => array( 121, 1, 1, 0 ),'FIND' => array( 124, -1, 1, 0 ),'CELL' => array( 125, -1, 0, 1 ),'ISERR' => array( 126, 1, 1, 0 ),'ISTEXT' => array( 127, 1, 1, 0 ),'ISNUMBER' => array( 128, 1, 1, 0 ),'ISBLANK' => array( 129, 1, 1, 0 ),'T' => array( 130, 1, 0, 0 ),'N' => array( 131, 1, 0, 0 ),'DATEVALUE' => array( 140, 1, 1, 0 ),'TIMEVALUE' => array( 141, 1, 1, 0 ),'SLN' => array( 142, 3, 1, 0 ),'SYD' => array( 143, 4, 1, 0 ),'DDB' => array( 144, -1, 1, 0 ),'INDIRECT' => array( 148, -1, 1, 1 ),'CALL' => array( 150, -1, 1, 0 ),'CLEAN' => array( 162, 1, 1, 0 ),'MDETERM' => array( 163, 1, 2, 0 ),'MINVERSE' => array( 164, 1, 2, 0 ),'MMULT' => array( 165, 2, 2, 0 ),'IPMT' => array( 167, -1, 1, 0 ),'PPMT' => array( 168, -1, 1, 0 ),'COUNTA' => array( 169, -1, 0, 0 ),'PRODUCT' => array( 183, -1, 0, 0 ),'FACT' => array( 184, 1, 1, 0 ),'DPRODUCT' => array( 189, 3, 0, 0 ),'ISNONTEXT' => array( 190, 1, 1, 0 ),'STDEVP' => array( 193, -1, 0, 0 ),'VARP' => array( 194, -1, 0, 0 ),'DSTDEVP' => array( 195, 3, 0, 0 ),'DVARP' => array( 196, 3, 0, 0 ),'TRUNC' => array( 197, -1, 1, 0 ),'ISLOGICAL' => array( 198, 1, 1, 0 ),'DCOUNTA' => array( 199, 3, 0, 0 ),'ROUNDUP' => array( 212, 2, 1, 0 ),'ROUNDDOWN' => array( 213, 2, 1, 0 ),'RANK' => array( 216, -1, 0, 0 ),'ADDRESS' => array( 219, -1, 1, 0 ),'DAYS360' => array( 220, -1, 1, 0 ),'TODAY' => array( 221, 0, 1, 1 ),'VDB' => array( 222, -1, 1, 0 ),'MEDIAN' => array( 227, -1, 0, 0 ),'SUMPRODUCT' => array( 228, -1, 2, 0 ),'SINH' => array( 229, 1, 1, 0 ),'COSH' => array( 230, 1, 1, 0 ),'TANH' => array( 231, 1, 1, 0 ),'ASINH' => array( 232, 1, 1, 0 ),'ACOSH' => array( 233, 1, 1, 0 ),'ATANH' => array( 234, 1, 1, 0 ),'DGET' => array( 235, 3, 0, 0 ),'INFO' => array( 244, 1, 1, 1 ),'DB' => array( 247, -1, 1, 0 ),'FREQUENCY' => array( 252, 2, 0, 0 ),'ERROR.TYPE' => array( 261, 1, 1, 0 ),'REGISTER.ID' => array( 267, -1, 1, 0 ),'AVEDEV' => array( 269, -1, 0, 0 ),'BETADIST' => array( 270, -1, 1, 0 ),'GAMMALN' => array( 271, 1, 1, 0 ),'BETAINV' => array( 272, -1, 1, 0 ),'BINOMDIST' => array( 273, 4, 1, 0 ),'CHIDIST' => array( 274, 2, 1, 0 ),'CHIINV' => array( 275, 2, 1, 0 ),'COMBIN' => array( 276, 2, 1, 0 ),'CONFIDENCE' => array( 277, 3, 1, 0 ),'CRITBINOM' => array( 278, 3, 1, 0 ),'EVEN' => array( 279, 1, 1, 0 ),'EXPONDIST' => array( 280, 3, 1, 0 ),'FDIST' => array( 281, 3, 1, 0 ),'FINV' => array( 282, 3, 1, 0 ),'FISHER' => array( 283, 1, 1, 0 ),'FISHERINV' => array( 284, 1, 1, 0 ),'FLOOR' => array( 285, 2, 1, 0 ),'GAMMADIST' => array( 286, 4, 1, 0 ),'GAMMAINV' => array( 287, 3, 1, 0 ),'CEILING' => array( 288, 2, 1, 0 ),'HYPGEOMDIST' => array( 289, 4, 1, 0 ),'LOGNORMDIST' => array( 290, 3, 1, 0 ),'LOGINV' => array( 291, 3, 1, 0 ),'NEGBINOMDIST' => array( 292, 3, 1, 0 ),'NORMDIST' => array( 293, 4, 1, 0 ),'NORMSDIST' => array( 294, 1, 1, 0 ),'NORMINV' => array( 295, 3, 1, 0 ),'NORMSINV' => array( 296, 1, 1, 0 ),'STANDARDIZE' => array( 297, 3, 1, 0 ),'ODD' => array( 298, 1, 1, 0 ),'PERMUT' => array( 299, 2, 1, 0 ),'POISSON' => array( 300, 3, 1, 0 ),'TDIST' => array( 301, 3, 1, 0 ),'WEIBULL' => array( 302, 4, 1, 0 ),'SUMXMY2' => array( 303, 2, 2, 0 ),'SUMX2MY2' => array( 304, 2, 2, 0 ),'SUMX2PY2' => array( 305, 2, 2, 0 ),'CHITEST' => array( 306, 2, 2, 0 ),'CORREL' => array( 307, 2, 2, 0 ),'COVAR' => array( 308, 2, 2, 0 ),'FORECAST' => array( 309, 3, 2, 0 ),'FTEST' => array( 310, 2, 2, 0 ),'INTERCEPT' => array( 311, 2, 2, 0 ),'PEARSON' => array( 312, 2, 2, 0 ),'RSQ' => array( 313, 2, 2, 0 ),'STEYX' => array( 314, 2, 2, 0 ),'SLOPE' => array( 315, 2, 2, 0 ),'TTEST' => array( 316, 4, 2, 0 ),'PROB' => array( 317, -1, 2, 0 ),'DEVSQ' => array( 318, -1, 0, 0 ),'GEOMEAN' => array( 319, -1, 0, 0 ),'HARMEAN' => array( 320, -1, 0, 0 ),'SUMSQ' => array( 321, -1, 0, 0 ),'KURT' => array( 322, -1, 0, 0 ),'SKEW' => array( 323, -1, 0, 0 ),'ZTEST' => array( 324, -1, 0, 0 ),'LARGE' => array( 325, 2, 0, 0 ),'SMALL' => array( 326, 2, 0, 0 ),'QUARTILE' => array( 327, 2, 0, 0 ),'PERCENTILE' => array( 328, 2, 0, 0 ),'PERCENTRANK' => array( 329, -1, 0, 0 ),'MODE' => array( 330, -1, 2, 0 ),'TRIMMEAN' => array( 331, 2, 0, 0 ),'TINV' => array( 332, 2, 1, 0 ),'CONCATENATE' => array( 336, -1, 1, 0 ),'POWER' => array( 337, 2, 1, 0 ),'RADIANS' => array( 342, 1, 1, 0 ),'DEGREES' => array( 343, 1, 1, 0 ),'SUBTOTAL' => array( 344, -1, 0, 0 ),'SUMIF' => array( 345, -1, 0, 0 ),'COUNTIF' => array( 346, 2, 0, 0 ),'COUNTBLANK' => array( 347, 1, 0, 0 ),'ROMAN' => array( 354, -1, 1, 0 ));}/*** Convert a token to the proper ptg value.** @access private* @param mixed $token The token to convert.* @return mixed the converted token on success. PEAR_Error if the token* is not recognized*/function _convert($token){if (preg_match("/^\"[^\"]{0,255}\"$/", $token)) {return $this->_convertString($token);} elseif (is_numeric($token)) {return $this->_convertNumber($token);// match references like A1 or $A$1} elseif (preg_match('/^\$?([A-Ia-i]?[A-Za-z])\$?(\d+)$/',$token)) {return $this->_convertRef2d($token);// match external references like Sheet1!A1 or Sheet1:Sheet2!A1} elseif (preg_match("/^\w+(\:\w+)?\![A-Ia-i]?[A-Za-z](\d+)$/u",$token)) {return $this->_convertRef3d($token);// match external references like 'Sheet1'!A1 or 'Sheet1:Sheet2'!A1} elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\![A-Ia-i]?[A-Za-z](\d+)$/u",$token)) {return $this->_convertRef3d($token);// match ranges like A1:B2} elseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)\:(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)$/",$token)) {return $this->_convertRange2d($token);// match ranges like A1..B2} elseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)\.\.(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)$/",$token)) {return $this->_convertRange2d($token);// match external ranges like Sheet1!A1 or Sheet1:Sheet2!A1:B2} elseif (preg_match("/^\w+(\:\w+)?\!([A-Ia-i]?[A-Za-z])?(\d+)\:([A-Ia-i]?[A-Za-z])?(\d+)$/u",$token)) {return $this->_convertRange3d($token);// match external ranges like 'Sheet1'!A1 or 'Sheet1:Sheet2'!A1:B2} elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\!([A-Ia-i]?[A-Za-z])?(\d+)\:([A-Ia-i]?[A-Za-z])?(\d+)$/u",$token)) {return $this->_convertRange3d($token);// operators (including parentheses)} elseif (isset($this->ptg[$token])) {return pack("C", $this->ptg[$token]);// commented so argument number can be processed correctly. See toReversePolish()./*elseif (preg_match("/[A-Z0-9\xc0-\xdc\.]+/",$token)){return($this->_convertFunction($token,$this->_func_args));}*/// if it's an argument, ignore the token (the argument remains)} elseif ($token == 'arg') {return '';}// TODO: use real error codesreturn $this->raiseError("Unknown token $token");}/*** Convert a number token to ptgInt or ptgNum** @access private* @param mixed $num an integer or double for conversion to its ptg value*/function _convertNumber($num){// Integer in the range 0..2**16-1if ((preg_match("/^\d+$/", $num)) and ($num <= 65535)) {return pack("Cv", $this->ptg['ptgInt'], $num);} else { // A floatif ($this->_byte_order) { // if it's Big Endian$num = strrev($num);}return pack("Cd", $this->ptg['ptgNum'], $num);}}/*** Convert a string token to ptgStr** @access private* @param string $string A string for conversion to its ptg value.* @return mixed the converted token on success. PEAR_Error if the string* is longer than 255 characters.*/function _convertString($string){// chop away beggining and ending quotes$string = substr($string, 1, strlen($string) - 2);if (strlen($string) > 255) {return $this->raiseError("String is too long");}if ($this->_BIFF_version == 0x0500) {return pack("CC", $this->ptg['ptgStr'], strlen($string)).$string;} elseif ($this->_BIFF_version == 0x0600) {$encoding = 0; // TODO: Unicode supportreturn pack("CCC", $this->ptg['ptgStr'], strlen($string), $encoding).$string;}}/*** Convert a function to a ptgFunc or ptgFuncVarV depending on the number of* args that it takes.** @access private* @param string $token The name of the function for convertion to ptg value.* @param integer $num_args The number of arguments the function receives.* @return string The packed ptg for the function*/function _convertFunction($token, $num_args){$args = $this->_functions[$token][1];$volatile = $this->_functions[$token][3];// Fixed number of args eg. TIME($i,$j,$k).if ($args >= 0) {return pack("Cv", $this->ptg['ptgFuncV'], $this->_functions[$token][0]);}// Variable number of args eg. SUM($i,$j,$k, ..).if ($args == -1) {return pack("CCv", $this->ptg['ptgFuncVarV'], $num_args, $this->_functions[$token][0]);}}/*** Convert an Excel range such as A1:D4 to a ptgRefV.** @access private* @param string $range An Excel range in the A1:A2 or A1..A2 format.*/function _convertRange2d($range, $class=0){// TODO: possible class value 0,1,2 check Formula.pm// Split the range into 2 cell refsif (preg_match("/^([A-Ia-i]?[A-Za-z])(\d+)\:([A-Ia-i]?[A-Za-z])(\d+)$/", $range)) {list($cell1, $cell2) = explode(':', $range);} elseif (preg_match("/^([A-Ia-i]?[A-Za-z])(\d+)\.\.([A-Ia-i]?[A-Za-z])(\d+)$/", $range)) {list($cell1, $cell2) = explode('..', $range);} else {// TODO: use real error codesreturn $this->raiseError("Unknown range separator", 0, PEAR_ERROR_DIE);}// Convert the cell references$cell_array1 = $this->_cellToPackedRowcol($cell1);if (PEAR::isError($cell_array1)) {return $cell_array1;}list($row1, $col1) = $cell_array1;$cell_array2 = $this->_cellToPackedRowcol($cell2);if (PEAR::isError($cell_array2)) {return $cell_array2;}list($row2, $col2) = $cell_array2;// The ptg value depends on the class of the ptg.if ($class == 0) {$ptgArea = pack("C", $this->ptg['ptgArea']);} elseif ($class == 1) {$ptgArea = pack("C", $this->ptg['ptgAreaV']);} elseif ($class == 2) {$ptgArea = pack("C", $this->ptg['ptgAreaA']);} else {// TODO: use real error codesreturn $this->raiseError("Unknown class $class", 0, PEAR_ERROR_DIE);}return $ptgArea . $row1 . $row2 . $col1. $col2;}/*** Convert an Excel 3d range such as "Sheet1!A1:D4" or "Sheet1:Sheet2!A1:D4" to* a ptgArea3d.** @access private* @param string $token An Excel range in the Sheet1!A1:A2 format.* @return mixed The packed ptgArea3d token on success, PEAR_Error on failure.*/function _convertRange3d($token){$class = 2; // as far as I know, this is magick.// Split the ref at the ! symbollist($ext_ref, $range) = explode('!', $token);// Convert the external reference part (different for BIFF8)if ($this->_BIFF_version == 0x0500) {$ext_ref = $this->_packExtRef($ext_ref);if (PEAR::isError($ext_ref)) {return $ext_ref;}} elseif ($this->_BIFF_version == 0x0600) {$ext_ref = $this->_getRefIndex($ext_ref);if (PEAR::isError($ext_ref)) {return $ext_ref;}}// Split the range into 2 cell refslist($cell1, $cell2) = explode(':', $range);// Convert the cell referencesif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)$/", $cell1)) {$cell_array1 = $this->_cellToPackedRowcol($cell1);if (PEAR::isError($cell_array1)) {return $cell_array1;}list($row1, $col1) = $cell_array1;$cell_array2 = $this->_cellToPackedRowcol($cell2);if (PEAR::isError($cell_array2)) {return $cell_array2;}list($row2, $col2) = $cell_array2;} else { // It's a rows range (like 26:27)$cells_array = $this->_rangeToPackedRange($cell1.':'.$cell2);if (PEAR::isError($cells_array)) {return $cells_array;}list($row1, $col1, $row2, $col2) = $cells_array;}// The ptg value depends on the class of the ptg.if ($class == 0) {$ptgArea = pack("C", $this->ptg['ptgArea3d']);} elseif ($class == 1) {$ptgArea = pack("C", $this->ptg['ptgArea3dV']);} elseif ($class == 2) {$ptgArea = pack("C", $this->ptg['ptgArea3dA']);} else {return $this->raiseError("Unknown class $class", 0, PEAR_ERROR_DIE);}return $ptgArea . $ext_ref . $row1 . $row2 . $col1. $col2;}/*** Convert an Excel reference such as A1, $B2, C$3 or $D$4 to a ptgRefV.** @access private* @param string $cell An Excel cell reference* @return string The cell in packed() format with the corresponding ptg*/function _convertRef2d($cell){$class = 2; // as far as I know, this is magick.// Convert the cell reference$cell_array = $this->_cellToPackedRowcol($cell);if (PEAR::isError($cell_array)) {return $cell_array;}list($row, $col) = $cell_array;// The ptg value depends on the class of the ptg.if ($class == 0) {$ptgRef = pack("C", $this->ptg['ptgRef']);} elseif ($class == 1) {$ptgRef = pack("C", $this->ptg['ptgRefV']);} elseif ($class == 2) {$ptgRef = pack("C", $this->ptg['ptgRefA']);} else {// TODO: use real error codesreturn $this->raiseError("Unknown class $class");}return $ptgRef.$row.$col;}/*** Convert an Excel 3d reference such as "Sheet1!A1" or "Sheet1:Sheet2!A1" to a* ptgRef3d.** @access private* @param string $cell An Excel cell reference* @return mixed The packed ptgRef3d token on success, PEAR_Error on failure.*/function _convertRef3d($cell){$class = 2; // as far as I know, this is magick.// Split the ref at the ! symbollist($ext_ref, $cell) = explode('!', $cell);// Convert the external reference part (different for BIFF8)if ($this->_BIFF_version == 0x0500) {$ext_ref = $this->_packExtRef($ext_ref);if (PEAR::isError($ext_ref)) {return $ext_ref;}} elseif ($this->_BIFF_version == 0x0600) {$ext_ref = $this->_getRefIndex($ext_ref);if (PEAR::isError($ext_ref)) {return $ext_ref;}}// Convert the cell reference partlist($row, $col) = $this->_cellToPackedRowcol($cell);// The ptg value depends on the class of the ptg.if ($class == 0) {$ptgRef = pack("C", $this->ptg['ptgRef3d']);} elseif ($class == 1) {$ptgRef = pack("C", $this->ptg['ptgRef3dV']);} elseif ($class == 2) {$ptgRef = pack("C", $this->ptg['ptgRef3dA']);} else {return $this->raiseError("Unknown class $class", 0, PEAR_ERROR_DIE);}return $ptgRef . $ext_ref. $row . $col;}/*** Convert the sheet name part of an external reference, for example "Sheet1" or* "Sheet1:Sheet2", to a packed structure.** @access private* @param string $ext_ref The name of the external reference* @return string The reference index in packed() format*/function _packExtRef($ext_ref){$ext_ref = preg_replace("/^'/", '', $ext_ref); // Remove leading ' if any.$ext_ref = preg_replace("/'$/", '', $ext_ref); // Remove trailing ' if any.// Check if there is a sheet range eg., Sheet1:Sheet2.if (preg_match("/:/", $ext_ref)) {list($sheet_name1, $sheet_name2) = explode(':', $ext_ref);$sheet1 = $this->_getSheetIndex($sheet_name1);if ($sheet1 == -1) {return $this->raiseError("Unknown sheet name $sheet_name1 in formula");}$sheet2 = $this->_getSheetIndex($sheet_name2);if ($sheet2 == -1) {return $this->raiseError("Unknown sheet name $sheet_name2 in formula");}// Reverse max and min sheet numbers if necessaryif ($sheet1 > $sheet2) {list($sheet1, $sheet2) = array($sheet2, $sheet1);}} else { // Single sheet name only.$sheet1 = $this->_getSheetIndex($ext_ref);if ($sheet1 == -1) {return $this->raiseError("Unknown sheet name $ext_ref in formula");}$sheet2 = $sheet1;}// References are stored relative to 0xFFFF.$offset = -1 - $sheet1;return pack('vdvv', $offset, 0x00, $sheet1, $sheet2);}/*** Look up the REF index that corresponds to an external sheet name* (or range). If it doesn't exist yet add it to the workbook's references* array. It assumes all sheet names given must exist.** @access private* @param string $ext_ref The name of the external reference* @return mixed The reference index in packed() format on success,* PEAR_Error on failure*/function _getRefIndex($ext_ref){$ext_ref = preg_replace("/^'/", '', $ext_ref); // Remove leading ' if any.$ext_ref = preg_replace("/'$/", '', $ext_ref); // Remove trailing ' if any.// Check if there is a sheet range eg., Sheet1:Sheet2.if (preg_match("/:/", $ext_ref)) {list($sheet_name1, $sheet_name2) = explode(':', $ext_ref);$sheet1 = $this->_getSheetIndex($sheet_name1);if ($sheet1 == -1) {return $this->raiseError("Unknown sheet name $sheet_name1 in formula");}$sheet2 = $this->_getSheetIndex($sheet_name2);if ($sheet2 == -1) {return $this->raiseError("Unknown sheet name $sheet_name2 in formula");}// Reverse max and min sheet numbers if necessaryif ($sheet1 > $sheet2) {list($sheet1, $sheet2) = array($sheet2, $sheet1);}} else { // Single sheet name only.$sheet1 = $this->_getSheetIndex($ext_ref);if ($sheet1 == -1) {return $this->raiseError("Unknown sheet name $ext_ref in formula");}$sheet2 = $sheet1;}// assume all references belong to this document$supbook_index = 0x00;$ref = pack('vvv', $supbook_index, $sheet1, $sheet2);$total_references = count($this->_references);$index = -1;for ($i = 0; $i < $total_references; $i++) {if ($ref == $this->_references[$i]) {$index = $i;break;}}// if REF was not found add it to references arrayif ($index == -1) {$this->_references[$total_references] = $ref;$index = $total_references;}return pack('v', $index);}/*** Look up the index that corresponds to an external sheet name. The hash of* sheet names is updated by the addworksheet() method of the* Spreadsheet_Excel_Writer_Workbook class.** @access private* @return integer The sheet index, -1 if the sheet was not found*/function _getSheetIndex($sheet_name){if (!isset($this->_ext_sheets[$sheet_name])) {return -1;} else {return $this->_ext_sheets[$sheet_name];}}/*** This method is used to update the array of sheet names. It is* called by the addWorksheet() method of the* Spreadsheet_Excel_Writer_Workbook class.** @access public* @see Spreadsheet_Excel_Writer_Workbook::addWorksheet()* @param string $name The name of the worksheet being added* @param integer $index The index of the worksheet being added*/function setExtSheet($name, $index){$this->_ext_sheets[$name] = $index;}/*** pack() row and column into the required 3 or 4 byte format.** @access private* @param string $cell The Excel cell reference to be packed* @return array Array containing the row and column in packed() format*/function _cellToPackedRowcol($cell){$cell = strtoupper($cell);list($row, $col, $row_rel, $col_rel) = $this->_cellToRowcol($cell);if ($col >= 256) {return $this->raiseError("Column in: $cell greater than 255");}// FIXME: change for BIFF8if ($row >= 16384) {return $this->raiseError("Row in: $cell greater than 16384 ");}// Set the high bits to indicate if row or col are relative.if ($this->_BIFF_version == 0x0500) {$row |= $col_rel << 14;$row |= $row_rel << 15;$col = pack('C', $col);} elseif ($this->_BIFF_version == 0x0600) {$col |= $col_rel << 14;$col |= $row_rel << 15;$col = pack('v', $col);}$row = pack('v', $row);return array($row, $col);}/*** pack() row range into the required 3 or 4 byte format.* Just using maximum col/rows, which is probably not the correct solution** @access private* @param string $range The Excel range to be packed* @return array Array containing (row1,col1,row2,col2) in packed() format*/function _rangeToPackedRange($range){preg_match('/(\$)?(\d+)\:(\$)?(\d+)/', $range, $match);// return absolute rows if there is a $ in the ref$row1_rel = empty($match[1]) ? 1 : 0;$row1 = $match[2];$row2_rel = empty($match[3]) ? 1 : 0;$row2 = $match[4];// Convert 1-index to zero-index$row1--;$row2--;// Trick poor inocent Excel$col1 = 0;$col2 = 16383; // FIXME: maximum possible value for Excel 5 (change this!!!)// FIXME: this changes for BIFF8if (($row1 >= 16384) or ($row2 >= 16384)) {return $this->raiseError("Row in: $range greater than 16384 ");}// Set the high bits to indicate if rows are relative.if ($this->_BIFF_version == 0x0500) {$row1 |= $row1_rel << 14; // FIXME: probably a bug$row2 |= $row2_rel << 15;$col1 = pack('C', $col1);$col2 = pack('C', $col2);} elseif ($this->_BIFF_version == 0x0600) {$col1 |= $row1_rel << 15;$col2 |= $row2_rel << 15;$col1 = pack('v', $col1);$col2 = pack('v', $col2);}$row1 = pack('v', $row1);$row2 = pack('v', $row2);return array($row1, $col1, $row2, $col2);}/*** Convert an Excel cell reference such as A1 or $B2 or C$3 or $D$4 to a zero* indexed row and column number. Also returns two (0,1) values to indicate* whether the row or column are relative references.** @access private* @param string $cell The Excel cell reference in A1 format.* @return array*/function _cellToRowcol($cell){preg_match('/(\$)?([A-I]?[A-Z])(\$)?(\d+)/',$cell,$match);// return absolute column if there is a $ in the ref$col_rel = empty($match[1]) ? 1 : 0;$col_ref = $match[2];$row_rel = empty($match[3]) ? 1 : 0;$row = $match[4];// Convert base26 column string to a number.$expn = strlen($col_ref) - 1;$col = 0;$col_ref_length = strlen($col_ref);for ($i = 0; $i < $col_ref_length; $i++) {$col += (ord($col_ref{$i}) - ord('A') + 1) * pow(26, $expn);$expn--;}// Convert 1-index to zero-index$row--;$col--;return array($row, $col, $row_rel, $col_rel);}/*** Advance to the next valid token.** @access private*/function _advance(){$i = $this->_current_char;$formula_length = strlen($this->_formula);// eat up white spacesif ($i < $formula_length) {while ($this->_formula{$i} == " ") {$i++;}if ($i < ($formula_length - 1)) {$this->_lookahead = $this->_formula{$i+1};}$token = '';}while ($i < $formula_length) {$token .= $this->_formula{$i};if ($i < ($formula_length - 1)) {$this->_lookahead = $this->_formula{$i+1};} else {$this->_lookahead = '';}if ($this->_match($token) != '') {//if ($i < strlen($this->_formula) - 1) {// $this->_lookahead = $this->_formula{$i+1};//}$this->_current_char = $i + 1;$this->_current_token = $token;return 1;}if ($i < ($formula_length - 2)) {$this->_lookahead = $this->_formula{$i+2};} else { // if we run out of characters _lookahead becomes empty$this->_lookahead = '';}$i++;}//die("Lexical error ".$this->_current_char);}/*** Checks if it's a valid token.** @access private* @param mixed $token The token to check.* @return mixed The checked token or false on failure*/function _match($token){switch($token) {case SPREADSHEET_EXCEL_WRITER_ADD:return $token;break;case SPREADSHEET_EXCEL_WRITER_SUB:return $token;break;case SPREADSHEET_EXCEL_WRITER_MUL:return $token;break;case SPREADSHEET_EXCEL_WRITER_DIV:return $token;break;case SPREADSHEET_EXCEL_WRITER_OPEN:return $token;break;case SPREADSHEET_EXCEL_WRITER_CLOSE:return $token;break;case SPREADSHEET_EXCEL_WRITER_COMA:return $token;break;case SPREADSHEET_EXCEL_WRITER_SEMICOLON:return $token;break;case SPREADSHEET_EXCEL_WRITER_GT:if ($this->_lookahead == '=') { // it's a GE tokenbreak;}return $token;break;case SPREADSHEET_EXCEL_WRITER_LT:// it's a LE or a NE tokenif (($this->_lookahead == '=') or ($this->_lookahead == '>')) {break;}return $token;break;case SPREADSHEET_EXCEL_WRITER_GE:return $token;break;case SPREADSHEET_EXCEL_WRITER_LE:return $token;break;case SPREADSHEET_EXCEL_WRITER_EQ:return $token;break;case SPREADSHEET_EXCEL_WRITER_NE:return $token;break;case SPREADSHEET_EXCEL_WRITER_CONCAT:return $token;break;default:// if it's a referenceif (preg_match('/^\$?[A-Ia-i]?[A-Za-z]\$?[0-9]+$/',$token) and!preg_match("/[0-9]/",$this->_lookahead) and($this->_lookahead != ':') and ($this->_lookahead != '.') and($this->_lookahead != '!')){return $token;}// If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1)elseif (preg_match("/^\w+(\:\w+)?\![A-Ia-i]?[A-Za-z][0-9]+$/u",$token) and!preg_match("/[0-9]/",$this->_lookahead) and($this->_lookahead != ':') and ($this->_lookahead != '.')){return $token;}// If it's an external reference ('Sheet1'!A1 or 'Sheet1:Sheet2'!A1)elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\![A-Ia-i]?[A-Za-z][0-9]+$/u",$token) and!preg_match("/[0-9]/",$this->_lookahead) and($this->_lookahead != ':') and ($this->_lookahead != '.')){return $token;}// if it's a range (A1:A2)elseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+:(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$token) and!preg_match("/[0-9]/",$this->_lookahead)){return $token;}// if it's a range (A1..A2)elseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+\.\.(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$token) and!preg_match("/[0-9]/",$this->_lookahead)){return $token;}// If it's an external range like Sheet1!A1 or Sheet1:Sheet2!A1:B2elseif (preg_match("/^\w+(\:\w+)?\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/u",$token) and!preg_match("/[0-9]/",$this->_lookahead)){return $token;}// If it's an external range like 'Sheet1'!A1 or 'Sheet1:Sheet2'!A1:B2elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/u",$token) and!preg_match("/[0-9]/",$this->_lookahead)){return $token;}// If it's a number (check that it's not a sheet name or range)elseif (is_numeric($token) and(!is_numeric($token.$this->_lookahead) or ($this->_lookahead == '')) and($this->_lookahead != '!') and ($this->_lookahead != ':')){return $token;}// If it's a string (of maximum 255 characters)elseif (preg_match("/^\"[^\"]{0,255}\"$/",$token)){return $token;}// if it's a function callelseif (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/i",$token) and ($this->_lookahead == "(")){return $token;}return '';}}/*** The parsing method. It parses a formula.** @access public* @param string $formula The formula to parse, without the initial equal* sign (=).* @return mixed true on success, PEAR_Error on failure*/function parse($formula){$this->_current_char = 0;$this->_formula = $formula;$this->_lookahead = $formula{1};$this->_advance();$this->_parse_tree = $this->_condition();if (PEAR::isError($this->_parse_tree)) {return $this->_parse_tree;}return true;}/*** It parses a condition. It assumes the following rule:* Cond -> Expr [(">" | "<") Expr]** @access private* @return mixed The parsed ptg'd tree on success, PEAR_Error on failure*/function _condition(){$result = $this->_expression();if (PEAR::isError($result)) {return $result;}if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_LT) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgLT', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_GT) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgGT', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_LE) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgLE', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_GE) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgGE', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_EQ) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgEQ', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_NE) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgNE', $result, $result2);} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_CONCAT) {$this->_advance();$result2 = $this->_expression();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgConcat', $result, $result2);}return $result;}/*** It parses a expression. It assumes the following rule:* Expr -> Term [("+" | "-") Term]* -> "string"* -> "-" Term** @access private* @return mixed The parsed ptg'd tree on success, PEAR_Error on failure*/function _expression(){// If it's a string return a string nodeif (preg_match("/^\"[^\"]{0,255}\"$/", $this->_current_token)) {$result = $this->_createTree($this->_current_token, '', '');$this->_advance();return $result;} elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_SUB) {// catch "-" Term$this->_advance();$result2 = $this->_expression();$result = $this->_createTree('ptgUminus', $result2, '');return $result;}$result = $this->_term();if (PEAR::isError($result)) {return $result;}while (($this->_current_token == SPREADSHEET_EXCEL_WRITER_ADD) or($this->_current_token == SPREADSHEET_EXCEL_WRITER_SUB)) {/**/if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_ADD) {$this->_advance();$result2 = $this->_term();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgAdd', $result, $result2);} else {$this->_advance();$result2 = $this->_term();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgSub', $result, $result2);}}return $result;}/*** This function just introduces a ptgParen element in the tree, so that Excel* doesn't get confused when working with a parenthesized formula afterwards.** @access private* @see _fact()* @return array The parsed ptg'd tree*/function _parenthesizedExpression(){$result = $this->_createTree('ptgParen', $this->_expression(), '');return $result;}/*** It parses a term. It assumes the following rule:* Term -> Fact [("*" | "/") Fact]** @access private* @return mixed The parsed ptg'd tree on success, PEAR_Error on failure*/function _term(){$result = $this->_fact();if (PEAR::isError($result)) {return $result;}while (($this->_current_token == SPREADSHEET_EXCEL_WRITER_MUL) or($this->_current_token == SPREADSHEET_EXCEL_WRITER_DIV)) {/**/if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_MUL) {$this->_advance();$result2 = $this->_fact();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgMul', $result, $result2);} else {$this->_advance();$result2 = $this->_fact();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('ptgDiv', $result, $result2);}}return $result;}/*** It parses a factor. It assumes the following rule:* Fact -> ( Expr )* | CellRef* | CellRange* | Number* | Function** @access private* @return mixed The parsed ptg'd tree on success, PEAR_Error on failure*/function _fact(){if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_OPEN) {$this->_advance(); // eat the "("$result = $this->_parenthesizedExpression();if ($this->_current_token != SPREADSHEET_EXCEL_WRITER_CLOSE) {return $this->raiseError("')' token expected.");}$this->_advance(); // eat the ")"return $result;}// if it's a referenceif (preg_match('/^\$?[A-Ia-i]?[A-Za-z]\$?[0-9]+$/',$this->_current_token)){$result = $this->_createTree($this->_current_token, '', '');$this->_advance();return $result;}// If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1)elseif (preg_match("/^\w+(\:\w+)?\![A-Ia-i]?[A-Za-z][0-9]+$/u",$this->_current_token)){$result = $this->_createTree($this->_current_token, '', '');$this->_advance();return $result;}// If it's an external reference ('Sheet1'!A1 or 'Sheet1:Sheet2'!A1)elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\![A-Ia-i]?[A-Za-z][0-9]+$/u",$this->_current_token)){$result = $this->_createTree($this->_current_token, '', '');$this->_advance();return $result;}// if it's a rangeelseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+:(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$this->_current_token) orpreg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+\.\.(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$this->_current_token)){$result = $this->_current_token;$this->_advance();return $result;}// If it's an external range (Sheet1!A1 or Sheet1!A1:B2)elseif (preg_match("/^\w+(\:\w+)?\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/u",$this->_current_token)){$result = $this->_current_token;$this->_advance();return $result;}// If it's an external range ('Sheet1'!A1 or 'Sheet1'!A1:B2)elseif (preg_match("/^'[\w -]+(\:[\w -]+)?'\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/u",$this->_current_token)){$result = $this->_current_token;$this->_advance();return $result;}elseif (is_numeric($this->_current_token)){$result = $this->_createTree($this->_current_token, '', '');$this->_advance();return $result;}// if it's a function callelseif (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/i",$this->_current_token)){$result = $this->_func();return $result;}return $this->raiseError("Syntax error: ".$this->_current_token.", lookahead: ".$this->_lookahead.", current char: ".$this->_current_char);}/*** It parses a function call. It assumes the following rule:* Func -> ( Expr [,Expr]* )** @access private* @return mixed The parsed ptg'd tree on success, PEAR_Error on failure*/function _func(){$num_args = 0; // number of arguments received$function = strtoupper($this->_current_token);$result = ''; // initialize result$this->_advance();$this->_advance(); // eat the "("while ($this->_current_token != ')') {/**/if ($num_args > 0) {if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_COMA or$this->_current_token == SPREADSHEET_EXCEL_WRITER_SEMICOLON){$this->_advance(); // eat the "," or ";"} else {return $this->raiseError("Syntax error: comma expected in "."function $function, arg #{$num_args}");}$result2 = $this->_condition();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('arg', $result, $result2);} else { // first argument$result2 = $this->_condition();if (PEAR::isError($result2)) {return $result2;}$result = $this->_createTree('arg', '', $result2);}$num_args++;}if (!isset($this->_functions[$function])) {return $this->raiseError("Function $function() doesn't exist");}$args = $this->_functions[$function][1];// If fixed number of args eg. TIME($i,$j,$k). Check that the number of args is valid.if (($args >= 0) and ($args != $num_args)) {return $this->raiseError("Incorrect number of arguments in function $function() ");}$result = $this->_createTree($function, $result, $num_args);$this->_advance(); // eat the ")"return $result;}/*** Creates a tree. In fact an array which may have one or two arrays (sub-trees)* as elements.** @access private* @param mixed $value The value of this node.* @param mixed $left The left array (sub-tree) or a final node.* @param mixed $right The right array (sub-tree) or a final node.* @return array A tree*/function _createTree($value, $left, $right){return array('value' => $value, 'left' => $left, 'right' => $right);}/*** Builds a string containing the tree in reverse polish notation (What you* would use in a HP calculator stack).* The following tree:** +* / \* 2 3** produces: "23+"** The following tree:** +* / \* 3 ** / \* 6 A1** produces: "36A1*+"** In fact all operands, functions, references, etc... are written as ptg's** @access public* @param array $tree The optional tree to convert.* @return string The tree in reverse polish notation*/function toReversePolish($tree = array()){$polish = ""; // the string we are going to returnif (empty($tree)) { // If it's the first call use _parse_tree$tree = $this->_parse_tree;}if (is_array($tree['left'])) {$converted_tree = $this->toReversePolish($tree['left']);if (PEAR::isError($converted_tree)) {return $converted_tree;}$polish .= $converted_tree;} elseif ($tree['left'] != '') { // It's a final node$converted_tree = $this->_convert($tree['left']);if (PEAR::isError($converted_tree)) {return $converted_tree;}$polish .= $converted_tree;}if (is_array($tree['right'])) {$converted_tree = $this->toReversePolish($tree['right']);if (PEAR::isError($converted_tree)) {return $converted_tree;}$polish .= $converted_tree;} elseif ($tree['right'] != '') { // It's a final node$converted_tree = $this->_convert($tree['right']);if (PEAR::isError($converted_tree)) {return $converted_tree;}$polish .= $converted_tree;}// if it's a function convert it here (so we can set it's arguments)if (preg_match("/^[A-Z0-9\xc0-\xdc\.]+$/",$tree['value']) and!preg_match('/^([A-Ia-i]?[A-Za-z])(\d+)$/',$tree['value']) and!preg_match("/^[A-Ia-i]?[A-Za-z](\d+)\.\.[A-Ia-i]?[A-Za-z](\d+)$/",$tree['value']) and!is_numeric($tree['value']) and!isset($this->ptg[$tree['value']])){// left subtree for a function is always an array.if ($tree['left'] != '') {$left_tree = $this->toReversePolish($tree['left']);} else {$left_tree = '';}if (PEAR::isError($left_tree)) {return $left_tree;}// add it's left subtree and return.return $left_tree.$this->_convertFunction($tree['value'], $tree['right']);} else {$converted_tree = $this->_convert($tree['value']);if (PEAR::isError($converted_tree)) {return $converted_tree;}}$polish .= $converted_tree;return $polish;}}?>