15953 2007-11-12 04:59:29 -0800 Add UTF-8 encoding/decoding to WTF 2007-11-14 00:54:02 -0800 1 1 1 Unclassified WebKit Web Template Framework 528+ (Nightly build) Mac OS X 10.4 RESOLVED FIXED P2 Normal --- 1 ap ap darin oldest_to_newest 60980 0 ap 2007-11-12 04:59:29 -0800 We have to handle UTF-8 in several places in JavaScriptCore, wtf/unicode looks like a good place to keep this code. Patch forthcoming. 60981 1 17201 ap 2007-11-12 05:13:13 -0800 Created attachment 17201 proposed patch 61044 2 17201 darin 2007-11-12 21:25:03 -0800 Comment on attachment 17201 proposed patch What exactly does JSStringCreateWithUTF8CString do if passed invalid UTF-8? What should it do? 268 * This method should only be used for *debugging* purposes as it 269 * is not Unicode safe. Perhaps that's overstating the case -- might there be some circumstances where you know it's an all-ASCII UString? Should we add a UTF-8 text decoder to WebCore that uses this? Maybe if we did we could get rid of the simple/complex system for ICU, since we could handle the most common encodings without creating much of a text encoding registry at all. And perhaps we could change functions that convert to UTF-8 in WebCore::String to not use the registry. Looks good, r=me 61054 3 ap 2007-11-12 23:13:51 -0800 Committed revision 27746. (In reply to comment #2) > (From update of attachment 17201 [edit]) > What exactly does JSStringCreateWithUTF8CString do if passed invalid UTF-8? I have now copied a comment describing strict/lenient modes to UTF8.h. For lenient mode as used by JSStringCreateWithUTF8CString(), it's: - both irregular sequences and isolated surrogates are converted; - illegal sequences will cause an error, and the result will be truncated to the first error position (this includes overlong forms); - characters over 0x10FFFF are converted to replacement character. > What should it do? This may or may not be what it should do, I'm not sure. > 268 * This method should only be used for *debugging* purposes as it > 269 * is not Unicode safe. > > Perhaps that's overstating the case -- might there be some circumstances where > you know it's an all-ASCII UString? I have re-worded the comment. 61060 4 ggaren 2007-11-13 00:03:55 -0800 Yay! 61084 5 darin 2007-11-13 09:10:50 -0800 (In reply to comment #3) > - both irregular sequences and isolated surrogates are converted; What are irregular sequences? You mean things like the sequence for U+FFFE? Seems OK for isolated surrogates, but also not necessarily useful. Perhaps they should be treated as illegal sequences. > - illegal sequences will cause an error, and the result will be truncated to the first error position (this includes overlong forms); I think it's a problem that this error condition can't be detected by the caller to JSStringCreateWithUTF8CString; I think it would be better to return 0 when there's an error. For APIs where there's both an error indication and a string, I think returning the truncated string arguably might be useful. For some clients, it would be good to be able to report where the error was (say, on the JavaScript console). > - characters over 0x10FFFF are converted to replacement character. I would prefer that characters over 0x10FFFF be handled the same way as other illegal sequences. 61088 6 ap 2007-11-13 10:11:10 -0800 (In reply to comment #5) > > - both irregular sequences and isolated surrogates are converted; > > What are irregular sequences? You mean things like the sequence for U+FFFE? An irregular UTF-8 code unit sequence is a six-byte sequence where the first three bytes correspond to a high surrogate, and the next three bytes correspond to a low surrogate. We can change the function to use strict decoding, and to return 0 if an error is detected. 61192 7 ap 2007-11-14 00:54:02 -0800 Filed bug 15982. 17201 2007-11-12 05:13:13 -0800 2007-11-12 21:25:03 -0800 proposed patch 15953r1_patch.txt text/plain 35904 ap SW5kZXg6IEphdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBKYXZhU2NyaXB0 Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDI3NzE2KQorKysgSmF2YVNjcmlwdENvcmUvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsNDMgQEAKKzIwMDctMTEtMTIgIEFsZXhleSBQ cm9za3VyeWFrb3YgIDxhcEB3ZWJraXQub3JnPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9E WSAoT09QUyEpLgorCisgICAgICAgIGh0dHA6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dp P2lkPTE1OTUzCisgICAgICAgIEFkZCBVVEYtOCBlbmNvZGluZy9kZWNvZGluZyB0byBXVEYKKwor ICAgICAgICAqIGtqcy91c3RyaW5nLmg6IE1vdmVkIFVURjhTZXF1ZW5jZUxlbmd0aCgpIGFuZCBk ZWNvZGVVVEY4U2VxdWVuY2UoKSB0byB3dGYvdW5pY29kZS4KKyAgICAgICAgKiBranMvdXN0cmlu 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