home/eliteafr/pmb/classes/writeexcel/class.writeexcel_formula.inc.php000066600000155553152165426260022175 0ustar00"); // @const SPREADSHEET_EXCEL_WRITER_GT token identifier for character ">" define('SPREADSHEET_EXCEL_WRITER_LT',"<"); // @const SPREADSHEET_EXCEL_WRITER_LT token identifier for character "<" define('SPREADSHEET_EXCEL_WRITER_LE',"<="); // @const SPREADSHEET_EXCEL_WRITER_LE token identifier for character "<=" define('SPREADSHEET_EXCEL_WRITER_GE',">="); // @const SPREADSHEET_EXCEL_WRITER_GE token identifier for character ">=" define('SPREADSHEET_EXCEL_WRITER_EQ',"="); // @const SPREADSHEET_EXCEL_WRITER_EQ token identifier for character "=" define('SPREADSHEET_EXCEL_WRITER_NE',"<>"); // @const SPREADSHEET_EXCEL_WRITER_NE token identifier for character "<>" class writeexcel_formula { ############################################################################### # # Class data. # var $parser; var $ptg; var $_functions; var $_current_char; var $_current_token; var $_lookahead; var $_debug; var $_byte_order; var $_volatile; var $_workbook; var $_ext_sheets; var $_formula; ############################################################################### # # new() # # Constructor # function writeexcel_formula($byte_order) { $this->parser = false; $this->ptg = array(); $this->_functions = array(); $this->_debug = 0; $this->_byte_order = $byte_order; $this->_volatile = 0; $this->_workbook = ""; $this->_ext_sheets = array(); $this->_current_token = ''; $this->_lookahead = ''; $this->_current_char = 0; $this->_formula = ''; } ############################################################################### # # _init_parser() # # There is a small overhead involved in generating the parser. Therefore, the # initialisation is delayed until a formula is required. TODO: use a pre- # compiled header. # function _init_parser() { $this->_initializeHashes(); if ($this->_debug) { print "Init_parser.\n\n"; } } ############################################################################### # # parse_formula() # # This is the only public method. It takes a textual description of a formula # and returns a RPN encoded byte string. # function parse_formula() { $_=func_get_args(); # Initialise the parser if this is the first call if ($this->parser===false) { $this->_init_parser(); } $formula = array_shift($_); //$str; //$tokens; if ($this->_debug) { print "$formula\n"; } # Build the parse tree for the formula $this->_formula = $formula; $this->_current_char = 0; $this->_lookahead = $this->_formula{1}; $this->_advance($formula); $parsetree = $this->_condition(); $str = $this->toReversePolish($parsetree); return $str; } function isError($data) { return (bool)(is_object($data) && (get_class($data) == 'pear_error' || is_subclass_of($data, 'pear_error'))); } /** * Class for parsing Excel formulas * * @author Xavier Noguer * @category FileFormats * @package Spreadsheet_Excel_Writer */ /** * 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:Sheet2!A1 elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\![A-Ia-i]?[A-Za-z](\d+)$/",$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:Sheet2!A1:B2 elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\!([A-Ia-i]?[A-Za-z])?(\d+)\:([A-Ia-i]?[A-Za-z])?(\d+)$/",$token)) { return $this->_convertRange3d($token); } // match external ranges like 'Sheet1:Sheet2'!A1:B2 elseif (preg_match("/^'[A-Za-z0-9_ ]+(\:[A-Za-z0-9_ ]+)?'\!([A-Ia-i]?[A-Za-z])?(\d+)\:([A-Ia-i]?[A-Za-z])?(\d+)$/",$token)) { return $this->_convertRange3d($token); } elseif (isset($this->ptg[$token])) // operators (including parentheses) { 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 codes trigger_error("Unknown token $token", E_USER_ERROR); } /** * 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**16-1 if ((preg_match("/^\d+$/",$num)) and ($num <= 65535)) { return(pack("Cv", $this->ptg['ptgInt'], $num)); } else { // A float if ($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 $string A string for conversion to its ptg value */ function _convertString($string) { // chop away beggining and ending quotes $string = substr($string, 1, strlen($string) - 2); return pack("CC", $this->ptg['ptgStr'], strlen($string)).$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) { $class = 2; // as far as I know, this is magick. // Split the range into 2 cell refs if (preg_match('/^\$?([A-Ia-i]?[A-Za-z])\$?(\d+)\:\$?([A-Ia-i]?[A-Za-z])\$?(\d+)$/',$range)) { list($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 codes trigger_error("Unknown range separator", E_USER_ERROR); } // Convert the cell references $cell_array1 = $this->_cellToPackedRowcol($cell1); if ($this->isError($cell_array1)) { return $cell_array1; } list($row1, $col1) = $cell_array1; $cell_array2 = $this->_cellToPackedRowcol($cell2); if ($this->isError($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 codes trigger_error("Unknown class $class", E_USER_ERROR); } return $ptgArea . $row1 . $row2 . $col1. $col2; } /** * Convert an Excel 3d range such as "Sheet1!A1:D4" or "Sheet1:Sheet2!A1:D4" to * a ptgArea3dV. * * @access private * @param string $token An Excel range in the Sheet1!A1:A2 format. */ function _convertRange3d($token) { $class = 2; // as far as I know, this is magick. // Split the ref at the ! symbol list($ext_ref, $range) = explode('!', $token); // Convert the external reference part $ext_ref = $this->_packExtRef($ext_ref); if ($this->isError($ext_ref)) { return $ext_ref; } // Split the range into 2 cell refs list($cell1, $cell2) = explode(':', $range); // Convert the cell references if (preg_match('/^(\$)?[A-Ia-i]?[A-Za-z](\$)?(\d+)$/', $cell1)) { $cell_array1 = $this->_cellToPackedRowcol($cell1); if ($this->isError($cell_array1)) { return $cell_array1; } list($row1, $col1) = $cell_array1; $cell_array2 = $this->_cellToPackedRowcol($cell2); if ($this->isError($cell_array2)) { return $cell_array2; } list($row2, $col2) = $cell_array2; } else { // It's a columns range (like 26:27) $cells_array = $this->_rangeToPackedRange($cell1.':'.$cell2); if ($this->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 { trigger_error("Unknown class $class", E_USER_ERROR); } 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 ($this->isError($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 codes trigger_error("Unknown class $class",E_USER_ERROR); } return $ptgRef.$row.$col; } /** * Convert an Excel 3d reference such as "Sheet1!A1" or "Sheet1:Sheet2!A1" to a * ptgRef3dV. * * @access private * @param string $cell An Excel cell reference * @return string The cell in packed() format with the corresponding ptg */ function _convertRef3d($cell) { $class = 2; // as far as I know, this is magick. // Split the ref at the ! symbol list($ext_ref, $cell) = explode('!', $cell); // Convert the external reference part $ext_ref = $this->_packExtRef($ext_ref); if ($this->isError($ext_ref)) { return $ext_ref; } // Convert the cell reference part list($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 { trigger_error("Unknown class $class", E_USER_ERROR); } 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) { trigger_error("Unknown sheet name $sheet_name1 in formula",E_USER_ERROR); } $sheet2 = $this->_getSheetIndex($sheet_name2); if ($sheet2 == -1) { trigger_error("Unknown sheet name $sheet_name2 in formula",E_USER_ERROR); } // Reverse max and min sheet numbers if necessary if ($sheet1 > $sheet2) { list($sheet1, $sheet2) = array($sheet2, $sheet1); } } else { // Single sheet name only. $sheet1 = $this->_getSheetIndex($ext_ref); if ($sheet1 == -1) { trigger_error("Unknown sheet name $ext_ref in formula",E_USER_ERROR); } $sheet2 = $sheet1; } // References are stored relative to 0xFFFF. $offset = -1 - $sheet1; return pack('vdvv', $offset, 0x00, $sheet1, $sheet2); } /** * Look up the index that corresponds to an external sheet name. The hash of * sheet names is updated by the addworksheet() method of the * Spreadsheet_Excel_Writer_Workbook class. * * @access private * @return integer */ function _getSheetIndex($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 private * @param string $name The name of the worksheet being added * @param integer $index The index of the worksheet being added */ function set_ext_sheet($name, $index) { $this->_ext_sheets[$name] = $index; } /** * pack() row and column into the required 3 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) { trigger_error("Column in: $cell greater than 255", E_USER_ERROR); } if ($row >= 16384) { trigger_error("Row in: $cell greater than 16384 ", E_USER_ERROR); } // Set the high bits to indicate if row or col are relative. $row |= $col_rel << 14; $row |= $row_rel << 15; $row = pack('v', $row); $col = pack('C', $col); return array($row, $col); } /** * pack() row range into the required 3 byte format. * Just using maximun 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; $col2 = 16383; // maximum possible value for Excel 5 (change this!!!) //list($row, $col, $row_rel, $col_rel) = $this->_cellToRowcol($cell); if (($row1 >= 16384) or ($row2 >= 16384)) { trigger_error("Row in: $range greater than 16384 ",E_USER_ERROR); } // Set the high bits to indicate if rows are relative. $row1 |= $row1_rel << 14; $row2 |= $row2_rel << 15; $row1 = pack('v', $row1); $row2 = pack('v', $row2); $col1 = pack('C', $col1); $col2 = pack('C', $col2); return array($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; $col = 0; for ($i=0; $i < strlen($col_ref); $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 = $this->_current_char; // eat up white spaces if ($i < strlen($this->_formula)) { while ($this->_formula{$i} == " ") { $i++; } if ($i < strlen($this->_formula) - 1) { $this->_lookahead = $this->_formula{$i+1}; } $token = ""; } while ($i < strlen($this->_formula)) { $token .= $this->_formula{$i}; if ($i < strlen($this->_formula) - 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 < strlen($this->_formula) - 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($token); break; case SPREADSHEET_EXCEL_WRITER_SCOLON: return($token); break; case SPREADSHEET_EXCEL_WRITER_COMA: return($token); break; case SPREADSHEET_EXCEL_WRITER_GT: if ($this->_lookahead == '=') { // it's a GE token break; } return($token); break; case SPREADSHEET_EXCEL_WRITER_LT: // it's a LE or a NE token if (($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; default: // if it's a reference if (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 $token; } // If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1) elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\![A-Ia-i]?[A-Za-z][0-9]+$/",$token) and !preg_match("#[0-9]#",$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 $token; } // If it's an external range like Sheet1:Sheet2!A1:B2 elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/",$token) and !preg_match("#[0-9]#",$this->_lookahead)) { return $token; } // If it's an external range like 'Sheet1:Sheet2'!A1:B2 elseif (preg_match("/^'[A-Za-z0-9_ ]+(\:[A-Za-z0-9_ ]+)?'\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/",$token) and !preg_match("#[0-9]#",$this->_lookahead)) { return $token; } // If it's a number (check that it's not a sheet name or range) elseif (is_numeric($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 $token; } // if it's a function call elseif (preg_match("#^[A-Z0-9\xc0-\xdc\.]+$#i",$token) and ($this->_lookahead == "(")) { return $token; } return ''; } } /** * The parsing method. It parses a formula. * * @access public * @param string $formula The formula to parse, without the initial equal sign (=). */ function parse($formula) { $this->_current_char = 0; $this->_formula = $formula; $this->_lookahead = $formula{1}; $this->_advance(); $this->_parse_tree = $this->_condition(); if ($this->isError($this->_parse_tree)) { return $this->_parse_tree; } } /** * It parses a condition. It assumes the following rule: * Cond -> Expr [(">" | "<") Expr] * * @access private * @return mixed The parsed ptg'd tree */ function _condition() { $result = $this->_expression(); if ($this->isError($result)) { return $result; } if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_LT) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgLT', $result, $result2); } elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_GT) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgGT', $result, $result2); } elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_LE) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgLE', $result, $result2); } elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_GE) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgGE', $result, $result2); } elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_EQ) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgEQ', $result, $result2); } elseif ($this->_current_token == SPREADSHEET_EXCEL_WRITER_NE) { $this->_advance(); $result2 = $this->_expression(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgNE', $result, $result2); } return $result; } /** * It parses a expression. It assumes the following rule: * Expr -> Term [("+" | "-") Term] * * @access private * @return mixed The parsed ptg'd tree */ function _expression() { // If it's a string return a string node if (preg_match("#^\"[^\"]{0,255}\"$#", $this->_current_token)) { $result = $this->_createTree($this->_current_token, '', ''); $this->_advance(); return $result; } $result = $this->_term(); if ($this->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 = $this->_term(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgAdd', $result, $result2); } else { $this->_advance(); $result2 = $this->_term(); if ($this->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 mixed 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 */ function _term() { $result = $this->_fact(); if ($this->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 = $this->_fact(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgMul', $result, $result2); } else { $this->_advance(); $result2 = $this->_fact(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('ptgDiv', $result, $result2); } } return $result; } /** * It parses a factor. It assumes the following rule: * Fact -> ( Expr ) * | CellRef * | CellRange * | Number * | Function * * @access private * @return mixed The parsed ptg'd tree */ function _fact() { if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_OPEN) { $this->_advance(); // eat the "(" $result = $this->_parenthesizedExpression(); if ($this->_current_token != SPREADSHEET_EXCEL_WRITER_CLOSE) { trigger_error("')' token expected.",E_USER_ERROR); } $this->_advance(); // eat the ")" return $result; } if (preg_match('/^\$?[A-Ia-i]?[A-Za-z]\$?[0-9]+$/',$this->_current_token)) { // if it's a reference $result = $this->_createTree($this->_current_token, '', ''); $this->_advance(); return $result; } elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\![A-Ia-i]?[A-Za-z][0-9]+$/",$this->_current_token)) { // If it's an external reference (Sheet1!A1 or Sheet1:Sheet2!A1) $result = $this->_createTree($this->_current_token, '', ''); $this->_advance(); return $result; } elseif (preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+:(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$this->_current_token) or preg_match("/^(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+\.\.(\$)?[A-Ia-i]?[A-Za-z](\$)?[0-9]+$/",$this->_current_token)) { // if it's a range $result = $this->_current_token; $this->_advance(); return $result; } elseif (preg_match("/^[A-Za-z0-9_]+(\:[A-Za-z0-9_]+)?\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/",$this->_current_token)) { // If it's an external range (Sheet1!A1:B2) $result = $this->_current_token; $this->_advance(); return $result; } elseif (preg_match("/^'[A-Za-z0-9_ ]+(\:[A-Za-z0-9_ ]+)?'\!([A-Ia-i]?[A-Za-z])?[0-9]+:([A-Ia-i]?[A-Za-z])?[0-9]+$/",$this->_current_token)) { // If it's an external range ('Sheet1'!A1:B2) $result = $this->_current_token; $this->_advance(); return $result; } elseif (is_numeric($this->_current_token)) { $result = $this->_createTree($this->_current_token, '', ''); $this->_advance(); return $result; } elseif (preg_match("#^[A-Z0-9\xc0-\xdc\.]+$#i",$this->_current_token)) { // if it's a function call $result = $this->_func(); return $result; } trigger_error("Sintactic error: ".$this->_current_token.", lookahead: ". $this->_lookahead.", current char: ".$this->_current_char, E_USER_ERROR); } /** * It parses a function call. It assumes the following rule: * Func -> ( Expr [,Expr]* ) * * @access private */ function _func() { $num_args = 0; // number of arguments received $function = $this->_current_token; $this->_advance(); $this->_advance(); // eat the "(" while ($this->_current_token != ')') { if ($num_args > 0) { if ($this->_current_token == SPREADSHEET_EXCEL_WRITER_COMA || $this->_current_token == SPREADSHEET_EXCEL_WRITER_SCOLON) { $this->_advance(); // eat the "," } else { trigger_error("Sintactic error: coma expected in ". "function $function, {$num_args}º arg", E_USER_ERROR); } $result2 = $this->_condition(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('arg', $result, $result2); } else { // first argument $result2 = $this->_condition(); if ($this->isError($result2)) { return $result2; } $result = $this->_createTree('arg', '', $result2); } $num_args++; } $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)) { trigger_error("Incorrect number of arguments in function $function() ",E_USER_ERROR); } $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 $right The right array (sub-tree) or a final node. */ function _createTree($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()) { $polish = ""; // the string we are going to return if (empty($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 ($this->isError($converted_tree)) { return $converted_tree; } $polish .= $converted_tree; } elseif ($tree['left'] != '') { // It's a final node $converted_tree = $this->_convert($tree['left']); if ($this->isError($converted_tree)) { return $converted_tree; } $polish .= $converted_tree; } if (is_array($tree['right'])) { $converted_tree = $this->toReversePolish($tree['right']); if ($this->isError($converted_tree)) { return $converted_tree; } $polish .= $converted_tree; } elseif ($tree['right'] != '') { // It's a final node $converted_tree = $this->_convert($tree['right']); if ($this->isError($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 { $left_tree = ''; } if ($this->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 ($this->isError($converted_tree)) { return $converted_tree; } } $polish .= $converted_tree; return $polish; } } ?>