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avoid comparisons that extend past the string length

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This commit is contained in:
Wolfgang Sourdeau
2012-10-30 16:59:22 -04:00
parent 1223a6c0ee
commit 21ee23e7df
1 changed files with 5 additions and 4 deletions
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SoObjects/SOGo/NSString+Utilities.m
+5 -4
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@@ -134,15 +134,16 @@ static int cssEscapingCount;
start--;
start++;
length = [self length];
// In [UIxMailPartTextViewer flatContentAsString], we first escape HTML entities and then
// add URLs. Therefore, the brackets (inequality signs <>) have been encoded at this point.
if ([[self substringWithRange: NSMakeRange (start, 4)] compare: @"&lt;"] == NSOrderedSame)
if (length > (start + 4)
&& [[self substringWithRange: NSMakeRange (start, 4)] compare: @"&lt;"] == NSOrderedSame)
start += 4;
length = [self length] - start;
workRange = NSMakeRange (start, length);
length -= start;
workRange = [self rangeOfCharacterFromSet: urlAfterEndingChars
options: NSLiteralSearch range: workRange];
options: NSLiteralSearch range: NSMakeRange (start, length)];
if (workRange.location != NSNotFound)
length = workRange.location - start;
while