alex
/
PhpSpreadsheet
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Modify numeric comparisons in calculation engine to make allowance for floating point imprecision

This commit is contained in:
MarkBaker 2015-01-17 22:51:48 +00:00
parent 16f2eb63a1
commit c089cfd53f
1 changed files with 19 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
Classes/PHPExcel/Calculation.php
View File

@ -1726,6 +1726,7 @@ class PHPExcel_Calculation {
if ($this->_savedPrecision < $setPrecision) {
ini_set('precision',$setPrecision);
}
$this->delta = 1 * pow(10, -$setPrecision);
if ($workbook !== NULL) {
self::$_workbookSets[$workbook->getID()] = $this;
@ -3600,27 +3601,39 @@ class PHPExcel_Calculation {
break;
// Equality
case '=':
$result = ($operand1 == $operand2);
if (is_numeric($operand1) && is_numeric($operand2)) {
$result = (abs($operand1 - $operand2) < $this->delta);
} else {
$result = strcmp($operand1, $operand2) == 0;
}
break;
// Greater than or equal
case '>=':
if ($useLowercaseFirstComparison) {
if (is_numeric($operand1) && is_numeric($operand2)) {
$result = ((abs($operand1 - $operand2) < $this->delta) || ($operand1 > $operand2));
} elseif ($useLowercaseFirstComparison) {
$result = $this->strcmpLowercaseFirst($operand1, $operand2) >= 0;
} else {
$result = ($operand1 >= $operand2);
$result = strcmp($operand1, $operand2) >= 0;
}
break;
// Less than or equal
case '<=':
if ($useLowercaseFirstComparison) {
if (is_numeric($operand1) && is_numeric($operand2)) {
$result = ((abs($operand1 - $operand2) < $this->delta) || ($operand1 < $operand2));
} elseif ($useLowercaseFirstComparison) {
$result = $this->strcmpLowercaseFirst($operand1, $operand2) <= 0;
} else {
$result = ($operand1 <= $operand2);
$result = strcmp($operand1, $operand2) <= 0;
}
break;
// Inequality
case '<>':
$result = ($operand1 != $operand2);
if (is_numeric($operand1) && is_numeric($operand2)) {
$result = (abs($operand1 - $operand2) > 1E-14);
} else {
$result = strcmp($operand1, $operand2) != 0;
}
break;
}