44080 2010-08-16 16:10:04 -0700 String find/reverseFind methods need tidying up 2010-08-17 04:11:28 -0700 1 1 1 Unclassified WebKit Web Template Framework 528+ (Nightly build) PC OS X 10.5 RESOLVED FIXED P2 Normal --- 44099 1 barraclough barraclough webkit.review.bot oldest_to_newest 265278 0 barraclough 2010-08-16 16:10:04 -0700 These methods have a couple of problems with their interface, and implementation. These methods take and int index, and return an int – however this is problematic since on 64-bit string indices may have a full 32-bit range. This spills out into surrounding code, which unsafely casts string indices from unsigned to int. Code checking the result of these methods check for a mix of "== -1", "< 0", and "== notFound". Clean this up by changing these methods to take an unsigned starting index, and return a size_t. with a failed match indicated by notFound. reverseFind also has a special meaning for the starting index argument, in that a negative index is interpreted as an offset back from the end of the string. Remove this functionality, in the (1!) case where it is used we should just calculate the offset by subtracting from the string's length. The implementation has a few problems too. The code is not in webkit style, in using assorted abbreviations in variable names, and implementations of similar find methods with differing argument types were unnecessarily inconsistent. When find is passed const char* data the string would be handled as latin1 (zero extended to UTF-16) for all characters but the first; this is sign extended. Case-insensitive find is broken for unicode strings; the hashing optimization is not unicode safe, and could result in false negatives. Unify UString find methods to match String. 265281 1 64531 barraclough 2010-08-16 16:14:13 -0700 Created attachment 64531 The patch 265283 2 webkit.review.bot 2010-08-16 16:15:38 -0700 Attachment 64531 did not pass style-queue: Failed to run "['WebKitTools/Scripts/check-webkit-style']" exit_code: 1 JavaScriptCore/wtf/text/StringImpl.h:304: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] JavaScriptCore/wtf/text/StringImpl.cpp:616: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] WebCore/platform/network/HTTPParsers.cpp:249: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] WebCore/css/CSSStyleSelector.cpp:2127: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] WebCore/platform/LinkHash.cpp:99: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] WebCore/platform/LinkHash.cpp:100: Tests for true/false, null/non-null, and zero/non-zero should all be done without equality comparisons. [readability/comparison_to_zero] [5] Total errors found: 6 in 56 files If any of these errors are false positives, please file a bug against check-webkit-style. 265286 3 64531 sam 2010-08-16 16:20:44 -0700 Comment on attachment 64531 The patch My only comment is that I think findCaseInsensitive should be renamed findIgnoringCase to match equalIgnoringCase (same for the reverse find case). Otherwise, r=me. 265308 4 barraclough 2010-08-16 17:26:38 -0700 fixed in r65468 64531 2010-08-16 16:14:13 -0700 2010-08-16 16:20:44 -0700 The patch find.patch text/plain 107089 barraclough SW5kZXg6IEphdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBKYXZhU2NyaXB0 Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDY1NDY2KQorKysgSmF2YVNjcmlwdENvcmUvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsNzMgQEAKKzIwMTAtMDgtMTYgIEdhdmluIEJh cnJhY2xvdWdoICA8YmFycmFjbG91Z2hAYXBwbGUuY29tPgorCisgICAgICAgIEJ1ZyA0NDA4MCAt IFN0cmluZyBmaW5kL3JldmVyc2VGaW5kIG1ldGhvZHMgbmVlZCB0aWR5aW5nIHVwCisgICAgICAg IFRoZXNlIG1ldGhvZHMgaGF2ZSBhIGNvdXBsZSBvZiBwcm9ibGVtcyB3aXRoIHRoZWlyIGludGVy ZmFjZSwgYW5kIGltcGxlbWVudGF0aW9uLgorCisgICAgICAgIFRoZXNlIG1ldGhvZHMgdGFrZSBh bmQgaW50IGluZGV4LCBhbmQgcmV0dXJuIGFuIGludCDigJMgaG93ZXZlciB0aGlzIGlzIHByb2Js ZW1hdGljCisgICAgICAgIHNpbmNlIG9uIDY0LWJpdCBzdHJpbmcgaW5kaWNlcyBtYXkgaGF2ZSBh 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