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<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2011 PHPExcel
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel_Shared
* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.6, 2011-02-27
*/
/**
* PHPExcel_Shared_String
*
* @category PHPExcel
* @package PHPExcel_Shared
* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_Shared_String
{
/** Constants */
/** Regular Expressions */
// Fraction
const STRING_REGEXP_FRACTION = '(-?)(\d+)\s+(\d+\/\d+)';
/**
* Control characters array
*
* @var string[]
*/
private static $_controlCharacters = array();
/**
* SYLK Characters array
*
* $var array
*/
private static $_SYLKCharacters = array();
/**
* Decimal separator
*
* @var string
*/
private static $_decimalSeparator;
/**
* Thousands separator
*
* @var string
*/
private static $_thousandsSeparator;
/**
* Currency code
*
* @var string
*/
private static $_currencyCode;
/**
* Is mbstring extension avalable?
*
* @var boolean
*/
private static $_isMbstringEnabled;
/**
* Is iconv extension avalable?
*
* @var boolean
*/
private static $_isIconvEnabled;
/**
* Build control characters array
*/
private static function _buildControlCharacters() {
for ($i = 0; $i <= 31; ++$i) {
if ($i != 9 && $i != 10 && $i != 13) {
$find = '_x' . sprintf('%04s' , strtoupper(dechex($i))) . '_';
$replace = chr($i);
self::$_controlCharacters[$find] = $replace;
}
}
}
/**
* Build SYLK characters array
*/
private static function _buildSYLKCharacters()
{
self::$_SYLKCharacters = array(
"\x1B 0" => chr(0),
"\x1B 1" => chr(1),
"\x1B 2" => chr(2),
"\x1B 3" => chr(3),
"\x1B 4" => chr(4),
"\x1B 5" => chr(5),
"\x1B 6" => chr(6),
"\x1B 7" => chr(7),
"\x1B 8" => chr(8),
"\x1B 9" => chr(9),
"\x1B :" => chr(10),
"\x1B ;" => chr(11),
"\x1B <" => chr(12),
"\x1B :" => chr(13),
"\x1B >" => chr(14),
"\x1B ?" => chr(15),
"\x1B!0" => chr(16),
"\x1B!1" => chr(17),
"\x1B!2" => chr(18),
"\x1B!3" => chr(19),
"\x1B!4" => chr(20),
"\x1B!5" => chr(21),
"\x1B!6" => chr(22),
"\x1B!7" => chr(23),
"\x1B!8" => chr(24),
"\x1B!9" => chr(25),
"\x1B!:" => chr(26),
"\x1B!;" => chr(27),
"\x1B!<" => chr(28),
"\x1B!=" => chr(29),
"\x1B!>" => chr(30),
"\x1B!?" => chr(31),
"\x1B'?" => chr(127),
"\x1B(0" => '€', // 128 in CP1252
"\x1B(2" => '‚', // 130 in CP1252
"\x1B(3" => 'ƒ', // 131 in CP1252
"\x1B(4" => '„', // 132 in CP1252
"\x1B(5" => '…', // 133 in CP1252
"\x1B(6" => '†', // 134 in CP1252
"\x1B(7" => '‡', // 135 in CP1252
"\x1B(8" => 'ˆ', // 136 in CP1252
"\x1B(9" => '‰', // 137 in CP1252
"\x1B(:" => 'Š', // 138 in CP1252
"\x1B(;" => '‹', // 139 in CP1252
"\x1BNj" => 'Œ', // 140 in CP1252
"\x1B(>" => 'Ž', // 142 in CP1252
"\x1B)1" => '‘', // 145 in CP1252
"\x1B)2" => '’', // 146 in CP1252
"\x1B)3" => '“', // 147 in CP1252
"\x1B)4" => '”', // 148 in CP1252
"\x1B)5" => '•', // 149 in CP1252
"\x1B)6" => '–', // 150 in CP1252
"\x1B)7" => '—', // 151 in CP1252
"\x1B)8" => '˜', // 152 in CP1252
"\x1B)9" => '™', // 153 in CP1252
"\x1B):" => 'š', // 154 in CP1252
"\x1B);" => '›', // 155 in CP1252
"\x1BNz" => 'œ', // 156 in CP1252
"\x1B)>" => 'ž', // 158 in CP1252
"\x1B)?" => 'Ÿ', // 159 in CP1252
"\x1B*0" => ' ', // 160 in CP1252
"\x1BN!" => '¡', // 161 in CP1252
"\x1BN\"" => '¢', // 162 in CP1252
"\x1BN#" => '£', // 163 in CP1252
"\x1BN(" => '¤', // 164 in CP1252
"\x1BN%" => '¥', // 165 in CP1252
"\x1B*6" => '¦', // 166 in CP1252
"\x1BN'" => '§', // 167 in CP1252
"\x1BNH " => '¨', // 168 in CP1252
"\x1BNS" => '©', // 169 in CP1252
"\x1BNc" => 'ª', // 170 in CP1252
"\x1BN+" => '«', // 171 in CP1252
"\x1B*<" => '¬', // 172 in CP1252
"\x1B*=" => '', // 173 in CP1252
"\x1BNR" => '®', // 174 in CP1252
"\x1B*?" => '¯', // 175 in CP1252
"\x1BN0" => '°', // 176 in CP1252
"\x1BN1" => '±', // 177 in CP1252
"\x1BN2" => '²', // 178 in CP1252
"\x1BN3" => '³', // 179 in CP1252
"\x1BNB " => '´', // 180 in CP1252
"\x1BN5" => 'µ', // 181 in CP1252
"\x1BN6" => '¶', // 182 in CP1252
"\x1BN7" => '·', // 183 in CP1252
"\x1B+8" => '¸', // 184 in CP1252
"\x1BNQ" => '¹', // 185 in CP1252
"\x1BNk" => 'º', // 186 in CP1252
"\x1BN;" => '»', // 187 in CP1252
"\x1BN<" => '¼', // 188 in CP1252
"\x1BN=" => '½', // 189 in CP1252
"\x1BN>" => '¾', // 190 in CP1252
"\x1BN?" => '¿', // 191 in CP1252
"\x1BNAA" => 'À', // 192 in CP1252
"\x1BNBA" => 'Á', // 193 in CP1252
"\x1BNCA" => 'Â', // 194 in CP1252
"\x1BNDA" => 'Ã', // 195 in CP1252
"\x1BNHA" => 'Ä', // 196 in CP1252
"\x1BNJA" => 'Å', // 197 in CP1252
"\x1BNa" => 'Æ', // 198 in CP1252
"\x1BNKC" => 'Ç', // 199 in CP1252
"\x1BNAE" => 'È', // 200 in CP1252
"\x1BNBE" => 'É', // 201 in CP1252
"\x1BNCE" => 'Ê', // 202 in CP1252
"\x1BNHE" => 'Ë', // 203 in CP1252
"\x1BNAI" => 'Ì', // 204 in CP1252
"\x1BNBI" => 'Í', // 205 in CP1252
"\x1BNCI" => 'Î', // 206 in CP1252
"\x1BNHI" => 'Ï', // 207 in CP1252
"\x1BNb" => 'Ð', // 208 in CP1252
"\x1BNDN" => 'Ñ', // 209 in CP1252
"\x1BNAO" => 'Ò', // 210 in CP1252
"\x1BNBO" => 'Ó', // 211 in CP1252
"\x1BNCO" => 'Ô', // 212 in CP1252
"\x1BNDO" => 'Õ', // 213 in CP1252
"\x1BNHO" => 'Ö', // 214 in CP1252
"\x1B-7" => '×', // 215 in CP1252
"\x1BNi" => 'Ø', // 216 in CP1252
"\x1BNAU" => 'Ù', // 217 in CP1252
"\x1BNBU" => 'Ú', // 218 in CP1252
"\x1BNCU" => 'Û', // 219 in CP1252
"\x1BNHU" => 'Ü', // 220 in CP1252
"\x1B-=" => 'Ý', // 221 in CP1252
"\x1BNl" => 'Þ', // 222 in CP1252
"\x1BN{" => 'ß', // 223 in CP1252
"\x1BNAa" => 'à', // 224 in CP1252
"\x1BNBa" => 'á', // 225 in CP1252
"\x1BNCa" => 'â', // 226 in CP1252
"\x1BNDa" => 'ã', // 227 in CP1252
"\x1BNHa" => 'ä', // 228 in CP1252
"\x1BNJa" => 'å', // 229 in CP1252
"\x1BNq" => 'æ', // 230 in CP1252
"\x1BNKc" => 'ç', // 231 in CP1252
"\x1BNAe" => 'è', // 232 in CP1252
"\x1BNBe" => 'é', // 233 in CP1252
"\x1BNCe" => 'ê', // 234 in CP1252
"\x1BNHe" => 'ë', // 235 in CP1252
"\x1BNAi" => 'ì', // 236 in CP1252
"\x1BNBi" => 'í', // 237 in CP1252
"\x1BNCi" => 'î', // 238 in CP1252
"\x1BNHi" => 'ï', // 239 in CP1252
"\x1BNs" => 'ð', // 240 in CP1252
"\x1BNDn" => 'ñ', // 241 in CP1252
"\x1BNAo" => 'ò', // 242 in CP1252
"\x1BNBo" => 'ó', // 243 in CP1252
"\x1BNCo" => 'ô', // 244 in CP1252
"\x1BNDo" => 'õ', // 245 in CP1252
"\x1BNHo" => 'ö', // 246 in CP1252
"\x1B/7" => '÷', // 247 in CP1252
"\x1BNy" => 'ø', // 248 in CP1252
"\x1BNAu" => 'ù', // 249 in CP1252
"\x1BNBu" => 'ú', // 250 in CP1252
"\x1BNCu" => 'û', // 251 in CP1252
"\x1BNHu" => 'ü', // 252 in CP1252
"\x1B/=" => 'ý', // 253 in CP1252
"\x1BN|" => 'þ', // 254 in CP1252
"\x1BNHy" => 'ÿ', // 255 in CP1252
);
}
/**
* Get whether mbstring extension is available
*
* @return boolean
*/
public static function getIsMbstringEnabled()
{
if (isset(self::$_isMbstringEnabled)) {
return self::$_isMbstringEnabled;
}
self::$_isMbstringEnabled = function_exists('mb_convert_encoding') ?
true : false;
return self::$_isMbstringEnabled;
}
/**
* Get whether iconv extension is available
*
* @return boolean
*/
public static function getIsIconvEnabled()
{
if (isset(self::$_isIconvEnabled)) {
return self::$_isIconvEnabled;
}
// Fail if iconv doesn't exist
if (!function_exists('iconv')) {
self::$_isIconvEnabled = false;
return false;
}
// Sometimes iconv is not working, and e.g. iconv('UTF-8', 'UTF-16LE', 'x') just returns false,
if (!@iconv('UTF-8', 'UTF-16LE', 'x')) {
self::$_isIconvEnabled = false;
return false;
}
// Sometimes iconv_substr('A', 0, 1, 'UTF-8') just returns false in PHP 5.2.0
// we cannot use iconv in that case either (http://bugs.php.net/bug.php?id=37773)
if (!@iconv_substr('A', 0, 1, 'UTF-8')) {
self::$_isIconvEnabled = false;
return false;
}
// CUSTOM: IBM AIX iconv() does not work
if ( defined('PHP_OS') && @stristr(PHP_OS, 'AIX')
&& defined('ICONV_IMPL') && (@strcasecmp(ICONV_IMPL, 'unknown') == 0)
&& defined('ICONV_VERSION') && (@strcasecmp(ICONV_VERSION, 'unknown') == 0) )
{
self::$_isIconvEnabled = false;
return false;
}
// If we reach here no problems were detected with iconv
self::$_isIconvEnabled = true;
return true;
}
public static function buildCharacterSets() {
if(empty(self::$_controlCharacters)) {
self::_buildControlCharacters();
}
if(empty(self::$_SYLKCharacters)) {
self::_buildSYLKCharacters();
}
}
/**
* Convert from OpenXML escaped control character to PHP control character
*
* Excel 2007 team:
* ----------------
* That's correct, control characters are stored directly in the shared-strings table.
* We do encode characters that cannot be represented in XML using the following escape sequence:
* _xHHHH_ where H represents a hexadecimal character in the character's value...
* So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
* element or in the shared string <t> element.
*
* @param string $value Value to unescape
* @return string
*/
public static function ControlCharacterOOXML2PHP($value = '') {
return str_replace( array_keys(self::$_controlCharacters), array_values(self::$_controlCharacters), $value );
}
/**
* Convert from PHP control character to OpenXML escaped control character
*
* Excel 2007 team:
* ----------------
* That's correct, control characters are stored directly in the shared-strings table.
* We do encode characters that cannot be represented in XML using the following escape sequence:
* _xHHHH_ where H represents a hexadecimal character in the character's value...
* So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
* element or in the shared string <t> element.
*
* @param string $value Value to escape
* @return string
*/
public static function ControlCharacterPHP2OOXML($value = '') {
return str_replace( array_values(self::$_controlCharacters), array_keys(self::$_controlCharacters), $value );
}
/**
* Try to sanitize UTF8, stripping invalid byte sequences. Not perfect. Does not surrogate characters.
*
* @param string $value
* @return string
*/
public static function SanitizeUTF8($value)
{
if (self::getIsIconvEnabled()) {
$value = @iconv('UTF-8', 'UTF-8', $value);
return $value;
}
if (self::getIsMbstringEnabled()) {
$value = mb_convert_encoding($value, 'UTF-8', 'UTF-8');
return $value;
}
// else, no conversion
return $value;
}
/**
* Check if a string contains UTF8 data
*
* @param string $value
* @return boolean
*/
public static function IsUTF8($value = '') {
return utf8_encode(utf8_decode($value)) === $value;
}
/**
* Formats a numeric value as a string for output in various output writers forcing
* point as decimal separator in case locale is other than English.
*
* @param mixed $value
* @return string
*/
public static function FormatNumber($value) {
if (is_float($value)) {
return str_replace(',', '.', $value);
}
return (string) $value;
}
/**
* Converts a UTF-8 string into BIFF8 Unicode string data (8-bit string length)
* Writes the string using uncompressed notation, no rich text, no Asian phonetics
* If mbstring extension is not available, ASCII is assumed, and compressed notation is used
* although this will give wrong results for non-ASCII strings
* see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
*
* @param string $value UTF-8 encoded string
* @return string
*/
public static function UTF8toBIFF8UnicodeShort($value)
{
// character count
$ln = self::CountCharacters($value, 'UTF-8');
// option flags
$opt = (self::getIsIconvEnabled() || self::getIsMbstringEnabled()) ?
0x0001 : 0x0000;
// characters
$chars = self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
$data = pack('CC', $ln, $opt) . $chars;
return $data;
}
/**
* Converts a UTF-8 string into BIFF8 Unicode string data (16-bit string length)
* Writes the string using uncompressed notation, no rich text, no Asian phonetics
* If mbstring extension is not available, ASCII is assumed, and compressed notation is used
* although this will give wrong results for non-ASCII strings
* see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
*
* @param string $value UTF-8 encoded string
* @return string
*/
public static function UTF8toBIFF8UnicodeLong($value)
{
// character count
$ln = self::CountCharacters($value, 'UTF-8');
// option flags
$opt = (self::getIsIconvEnabled() || self::getIsMbstringEnabled()) ?
0x0001 : 0x0000;
// characters
$chars = self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
$data = pack('vC', $ln, $opt) . $chars;
return $data;
}
/**
* Convert string from one encoding to another. First try iconv, then mbstring, or no convertion
*
* @param string $value
* @param string $to Encoding to convert to, e.g. 'UTF-8'
* @param string $from Encoding to convert from, e.g. 'UTF-16LE'
* @return string
*/
public static function ConvertEncoding($value, $to, $from)
{
if (self::getIsIconvEnabled()) {
$value = iconv($from, $to, $value);
return $value;
}
if (self::getIsMbstringEnabled()) {
$value = mb_convert_encoding($value, $to, $from);
return $value;
}
if($from == 'UTF-16LE'){
return self::utf16_decode($value, false);
}else if($from == 'UTF-16BE'){
return self::utf16_decode($value);
}
// else, no conversion
return $value;
}
/**
* Decode UTF-16 encoded strings.
*
* Can handle both BOM'ed data and un-BOM'ed data.
* Assumes Big-Endian byte order if no BOM is available.
* This function was taken from http://php.net/manual/en/function.utf8-decode.php
* and $bom_be parameter added.
*
* @param string $str UTF-16 encoded data to decode.
* @return string UTF-8 / ISO encoded data.
* @access public
* @version 0.2 / 2010-05-13
* @author Rasmus Andersson {@link http://rasmusandersson.se/}
* @author vadik56
*/
public static function utf16_decode( $str, $bom_be=true ) {
if( strlen($str) < 2 ) return $str;
$c0 = ord($str{0});
$c1 = ord($str{1});
if( $c0 == 0xfe && $c1 == 0xff ) { $str = substr($str,2); }
elseif( $c0 == 0xff && $c1 == 0xfe ) { $str = substr($str,2); $bom_be = false; }
$len = strlen($str);
$newstr = '';
for($i=0;$i<$len;$i+=2) {
if( $bom_be ) { $val = ord($str{$i}) << 4; $val += ord($str{$i+1}); }
else { $val = ord($str{$i+1}) << 4; $val += ord($str{$i}); }
$newstr .= ($val == 0x228) ? "\n" : chr($val);
}
return $newstr;
}
/**
* Get character count. First try mbstring, then iconv, finally strlen
*
* @param string $value
* @param string $enc Encoding
* @return int Character count
*/
public static function CountCharacters($value, $enc = 'UTF-8')
{
if (self::getIsIconvEnabled()) {
return iconv_strlen($value, $enc);
}
if (self::getIsMbstringEnabled()) {
return mb_strlen($value, $enc);
}
// else strlen
return strlen($value);
}
/**
* Get a substring of a UTF-8 encoded string
*
* @param string $pValue UTF-8 encoded string
* @param int $start Start offset
* @param int $length Maximum number of characters in substring
* @return string
*/
public static function Substring($pValue = '', $pStart = 0, $pLength = 0)
{
if (self::getIsIconvEnabled()) {
return iconv_substr($pValue, $pStart, $pLength, 'UTF-8');
}
if (self::getIsMbstringEnabled()) {
return mb_substr($pValue, $pStart, $pLength, 'UTF-8');
}
// else substr
return substr($pValue, $pStart, $pLength);
}
/**
* Identify whether a string contains a fractional numeric value,
* and convert it to a numeric if it is
*
* @param string &$operand string value to test
* @return boolean
*/
public static function convertToNumberIfFraction(&$operand) {
if (preg_match('/^'.self::STRING_REGEXP_FRACTION.'$/i', $operand, $match)) {
$sign = ($match[1] == '-') ? '-' : '+';
$fractionFormula = '='.$sign.$match[2].$sign.$match[3];
$operand = PHPExcel_Calculation::getInstance()->_calculateFormulaValue($fractionFormula);
return true;
}
return false;
} // function convertToNumberIfFraction()
/**
* Get the decimal separator. If it has not yet been set explicitly, try to obtain number
* formatting information from locale.
*
* @return string
*/
public static function getDecimalSeparator()
{
if (!isset(self::$_decimalSeparator)) {
$localeconv = localeconv();
self::$_decimalSeparator = $localeconv['decimal_point'] != ''
? $localeconv['decimal_point'] : $localeconv['mon_decimal_point'];
if (self::$_decimalSeparator == '') {
// Default to .
self::$_decimalSeparator = '.';
}
}
return self::$_decimalSeparator;
}
/**
* Set the decimal separator. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
* to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
*
* @param string $pValue Character for decimal separator
*/
public static function setDecimalSeparator($pValue = '.')
{
self::$_decimalSeparator = $pValue;
}
/**
* Get the thousands separator. If it has not yet been set explicitly, try to obtain number
* formatting information from locale.
*
* @return string
*/
public static function getThousandsSeparator()
{
if (!isset(self::$_thousandsSeparator)) {
$localeconv = localeconv();
self::$_thousandsSeparator = $localeconv['thousands_sep'] != ''
? $localeconv['thousands_sep'] : $localeconv['mon_thousands_sep'];
}
return self::$_thousandsSeparator;
}
/**
* Set the thousands separator. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
* to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
*
* @param string $pValue Character for thousands separator
*/
public static function setThousandsSeparator($pValue = ',')
{
self::$_thousandsSeparator = $pValue;
}
/**
* Get the currency code. If it has not yet been set explicitly, try to obtain the
* symbol information from locale.
*
* @return string
*/
public static function getCurrencyCode()
{
if (!isset(self::$_currencyCode)) {
$localeconv = localeconv();
self::$_currencyCode = $localeconv['currency_symbol'] != ''
? $localeconv['currency_symbol'] : $localeconv['int_curr_symbol'];
if (self::$_currencyCode == '') {
// Default to $
self::$_currencyCode = '$';
}
}
return self::$_currencyCode;
}
/**
* Set the currency code. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
* to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
*
* @param string $pValue Character for currency code
*/
public static function setCurrencyCode($pValue = '$')
{
self::$_currencyCode = $pValue;
}
/**
* Convert SYLK encoded string to UTF-8
*
* @param string $pValue
* @return string UTF-8 encoded string
*/
public static function SYLKtoUTF8($pValue = '')
{
// If there is no escape character in the string there is nothing to do
if (strpos($pValue, '') === false) {
return $pValue;
}
foreach (self::$_SYLKCharacters as $k => $v) {
$pValue = str_replace($k, $v, $pValue);
}
return $pValue;
}
}
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