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Minor performance tweaks 

git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@62816 2327b42d-5241-43d6-9e2a-de5ac946f064
This commit is contained in:
Mark Baker 2010-10-26 15:40:55 +00:00
parent 66f0fb12d8
commit e3b15694c0
1 changed files with 3 additions and 6 deletions
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9
Classes/PHPExcel/Cell.php
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@ -627,20 +627,17 @@ class PHPExcel_Cell
'N' => 14, 'O' => 15, 'P' => 16, 'Q' => 17, 'R' => 18, 'S' => 19, 'T' => 20, 'U' => 21, 'V' => 22, 'W' => 23, 'X' => 24, 'Y' => 25, 'Z' => 26
);
if (isset($lookup[$pString]))
return $lookup[$pString];
// Convert to uppercase
$pString = strtoupper($pString);
$strLen = strlen($pString);
// Convert column to integer
if ($strLen == 1) {
return (ord($pString{0}) - 64);
return $lookup[$pString];
} elseif ($strLen == 2) {
return $result = ((1 + (ord($pString{0}) - 65)) * 26) + (ord($pString{1}) - 64);
return $lookup[$pString{0}] * 26 + $lookup[$pString{1}];
} elseif ($strLen == 3) {
return ((1 + (ord($pString{0}) - 65)) * 676) + ((1 + (ord($pString{1}) - 65)) * 26) + (ord($pString{2}) - 64);
return $lookup[$pString{0}] * 676 + $lookup[$pString{1}] * 26 + $lookup[$pString{2}];
} else {
throw new Exception("Column string index can not be " . ($strLen != 0 ? "longer than 3 characters" : "empty") . ".");
}