Bug 221194 – Fix longstanding FIXME in parseNumericColor about not doubly clamping color components

• Component: New Bugs
• Status: RESOLVED FIXED

[Sam Weinig]

Fix long standing FIXME in parseNumericColor about not double clamping color components

[Sam Weinig]

Created attachment 418838 [details]
Patch

[Darin Adler]

Comment on attachment 418838 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=418838&action=review

> Source/WebCore/ChangeLog:3
> +        Fix long standing FIXME in parseNumericColor about not double clamping color components

I realize now that "doubly clamping" is what you mean by "double clamping"; at first I thought it was referring to "double", the C++ type.

[Sam Weinig]

(In reply to Darin Adler from comment #2)
> Comment on attachment 418838 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=418838&action=review
> 
> > Source/WebCore/ChangeLog:3
> > +        Fix long standing FIXME in parseNumericColor about not double clamping color components
> 
> I realize now that "doubly clamping" is what you mean by "double clamping";
> at first I thought it was referring to "double", the C++ type.

Heh, yeah, doubly is definitely more clear.

[Sam Weinig]

Created attachment 418922 [details]
Patch

[Sam Weinig]

Ok, this one should be good to review.

[Sam Weinig]

(In reply to Sam Weinig from comment #5)
> Ok, this one should be good to review.

Apparently not. Hm.

[Sam Weinig]

Created attachment 419010 [details]
Patch

[Sam Weinig]

Comment on attachment 419010 [details]
Patch

Ok, now!

[Darin Adler]

Comment on attachment 419010 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=419010&action=review

> Source/WebCore/css/parser/CSSParserFastPaths.cpp:317
> +    ASSERT(localValue <= 255);

I see that these functions mostly use 255, not 0xFF, nor some symbolic constant or long horrible thing like static_cast<int>(std::numeric_limits<uint8_t>::max()).

For the record, I slightly prefer 0xFF. But there’s no 0xFF.0 for floating point, so maybe that’s a non-starter.

> Source/WebCore/css/parser/CSSParserFastPaths.cpp:371
> +        uint8_t result = negative ? 0 : tenthAlphaValues[string[length - 2] - '0'];

Could stick the character into a local variable instead of the result, if we want to avoid having to state the type of the result.

[EWS]

Committed r272226: <https://trac.webkit.org/changeset/272226>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 419010 [details].

[Radar WebKit Bug Importer]

<rdar://problem/73892310>