This way we don't have to go through a bunch of printf nonsense, and we
ought to be able to arrive at optimized routines that take advantage of
constant radices, etc.
Differential Revision: https://phabricator.services.mozilla.com/D25141
--HG--
extra : moz-landing-system : lando
There is no advantage in making these methods more restrictive on their
parameters than AssignLiteral.
The current implementation of the AppendLiteral overloads for equivalent
char_types is more permissive than AssignLiteral, but comments in the
implementation mention the possible optimization used in AssignLiteral and so
are assuming a similar constant and static storage duration restriction on its
parameter. The optimization may never be implemented, but clients that would
benefit from support for non-constant or non-static parameters are also
expected to be rare, so there is little value in ruling out the optimization
at this stage.
ReplaceLiteral currently uses the AssignLiteral optimization.
Differential Revision: https://phabricator.services.mozilla.com/D8777
--HG--
extra : moz-landing-system : lando
A character array initialized with a list of character literals will not
necessarily have a trailing null-terminator required for AssignLiteral or
trimmed in EqualsLiteral.
Depends on D8775
Differential Revision: https://phabricator.services.mozilla.com/D8951
--HG--
extra : moz-landing-system : lando
There is no advantage in AssignASCII() for char, and AssignASCII() does not
exist for char16_t array and char_type. Similarly for ReplaceASCII and
AppendASCII. This AssignLiteral() overload already says it is not only for
ASCII.
Depends on D8771
Differential Revision: https://phabricator.services.mozilla.com/D8773
--HG--
extra : moz-landing-system : lando
Since https://hg.mozilla.org/mozilla-central/rev/9db7cf4cc385#l13.44 the type
system always excludes calls with character pointers and so there is no need
to mention this in the comment.
The comment for the 8-bit to 16-bit AssignLiteral overload is modified a
little to use "char" instead of "character" so as not to imply that anything
other than 8-bit char parameters may be provided to that overload.
The ReplaceLiteral and InsertLiteral comments are adjusted to use "character"
instead of "char" so as not to imply that the method or comment is limited to
8-bit char parameters.
Differential Revision: https://phabricator.services.mozilla.com/D8770
--HG--
extra : moz-landing-system : lando
This removes the rarely used and somewhat odd
`iterator& BeginWriting/EndWriting(iterator&)` functions that take an iterator
as an in/out param and then return it.
--HG--
extra : rebase_source : 92066f996595e9b7df9642813c08592cee47c630
XPCOM strings mark logically unused parts of nsStringBuffer as uninitialized
in debug builds by writing a marker byte and if memory checking is active,
by telling the memory checking that the range of memory is uninitialized.
This patch limits such marking to up to 16 code units to avoid quadratic
behavior, which is especially bad when there's a large disparity between
length and capacity (after a call to SetCapacity()).
The assumption here is that even a small poisoned memory range is enough
to detect the bugs that the poisoning is intended to detect.
MozReview-Commit-ID: 178rp0ckztj
Differential Revision: https://phabricator.services.mozilla.com/D5838
--HG--
extra : moz-landing-system : lando
Correctness improvements:
* UTF errors are handled safely per spec instead of dangerously truncating
strings.
* There are fewer converter implementations.
Performance improvements:
* The old code did exact buffer length math, which meant doing UTF math twice
on each input string (once for length calculation and another time for
conversion). Exact length math is more complicated when handling errors
properly, which the old code didn't do. The new code does UTF math on the
string content only once (when converting) but risks allocating more than
once. There are heuristics in place to lower the probability of
reallocation in cases where the double math avoidance isn't enough of a
saving to absorb an allocation and memcpy.
* Previously, in UTF-16 <-> UTF-8 conversions, an ASCII prefix was optimized
but a single non-ASCII code point pessimized the rest of the string. The
new code tries to get back on the fast ASCII path.
* UTF-16 to Latin1 conversion guarantees less about handling of out-of-range
input to eliminate an operation from the inner loop on x86/x86_64.
* When assigning to a pre-existing string, the new code tries to reuse the
old buffer instead of first releasing the old buffer and then allocating a
new one.
* When reallocating from the new code, the memcpy covers only the data that
is part of the logical length of the old string instead of memcpying the
whole capacity. (For old callers old excess memcpy behavior is preserved
due to bogus callers. See bug 1472113.)
* UTF-8 strings in XPConnect that are in the Latin1 range are passed to
SpiderMonkey as Latin1.
New features:
* Conversion between UTF-8 and Latin1 is added in order to enable faster
future interop between Rust code (or otherwise UTF-8-using code) and text
node and SpiderMonkey code that uses Latin1.
MozReview-Commit-ID: JaJuExfILM9
This gcc 4.9 workaround (from bug 1377351) is no longer needed because Firefox currently requires gcc 6.1 or later (as of bug 1444274).
MozReview-Commit-ID: 9R14BDzWEoj
--HG--
extra : rebase_source : a56ec3ee321cdc76e704fe33c2c4a5b85b558889
extra : source : e0c26ec11d499058e51bc2c3d06b2e1840e77f13
This was done automatically replacing:
s/mozilla::Move/std::move/
s/ Move(/ std::move(/
s/(Move(/(std::move(/
Removing the 'using mozilla::Move;' lines.
And then with a few manual fixups, see the bug for the split series..
MozReview-Commit-ID: Jxze3adipUh
In order to properly disable template functions with `std::enable_if` we need
to use the resulting type. This only works if we use a dependent type in the
template params, hence the need to shadow the `T` param.
Proper usage is now of the form:
template<typename Q = T, typename EnableIfChar = CharOnlyT<Q>>
Foo();
--HG--
extra : rebase_source : da7855403d9e683d06d3858e26805e9d8e338208
This removes the double-include macro hackery that we use to define two
separate string types (nsAString and nsACString) in favor of a templated
solution.
Annotations for Valgrind and the JS hazard analysis are updated as well as
the rust binding generations for string code.
--HG--
extra : rebase_source : 63ab2c4620cfcd4b764d42d654c82f30f984d016
extra : source : 9115364cd4aa078c49bba7911069f8178e55166f
I actually couldn't figure out a way to trigger this assertion with the
current string code without doing invalid casts, but there are things we
may want to add to the string code in the future that might risk hitting
this (e.g., move constructors, promoting various rebind methods to
nsA[C]String), so I think it's worth asserting.
MozReview-Commit-ID: 4R0dYuTfrFW
--HG--
extra : transplant_source : %B6%87I%0E%7F%21%CC2%19%CD%A7%E6TRA%9D%AEO%90%D7
This is needed for patch 4.
MozReview-Commit-ID: 4BFlTtQdtoN
--HG--
extra : transplant_source : %7C%F7%FDN%E5%7Df%0C%7D%10%EF%C0%25%B9%D6%18%1E%93%BE%A0
This is needed for patch 4.
MozReview-Commit-ID: 5ikQFIL9O0i
--HG--
extra : transplant_source : %88%80%E3%04%11%7E%7F%A4%7E%15%1B%1A%84%E2%13%3E%F6%E8%2A%1C
I believe this should fix some incorrect clearing of F_CLASS_FIXED.
MozReview-Commit-ID: 4ga2NEM9M5Z
--HG--
extra : transplant_source : %ECF%CF%D0%F6%19%9F%24%86%EFR%CAVZ%ED%60%D5nU%D8
All the instances are converted as follows.
- nsSubstring --> nsAString
- nsCSubstring --> nsACString
--HG--
extra : rebase_source : cfd2238c52e3cb4d13e3bd5ddb80ba6584ab6d91
This annotates vsprintf-like functions with MOZ_FORMAT_PRINTF. This may
provide some minimal checking of such calls (the GCC docs say that it
checks for the string for "consistency"); but in any case shouldn't
hurt.
MozReview-Commit-ID: HgnAK1LiorE
--HG--
extra : rebase_source : 9c8d715d6560f89078c26ba3934e52a2b5778b6a
This requires some adjustment to Equals(). Previously, when you wrote:
fooString.Equals(barString + bazString)
you'd get a tuple for the operator+, which implicitly converts to nsTSubstring, which resolves into nsTSubstring::Equals(const nsTSubstring&).
Now that Equals has moved one level up:
nsTStringRepr::Equals(const nsTStringRepr&)
The compiler can't make the double-leap from nsTSubstringTuple -> nsTSubstring -> nsTStringRepr.
So I implemented this manually.
MozReview-Commit-ID: 5x8XhndOToJ
--HG--
extra : rebase_source : ab0ec1259af522ea47a237e01f69dd28e593eacd
All nsTStringRepr methods must be const, so the mutators remain on nsTSubstring.
I left a small number of const methods on nsTSubstring, e.g. Capacity(), the rationale being that you would only be interested in this method if you intend to mutate the string.
I considered splitting up the typedefs block and leaving behind the ones related to mutation (e.g. nsWritingIterator) but I think it makes for clearer documentation to have them all in one place.
MozReview-Commit-ID: 7dEaRgc8NLK
--HG--
extra : rebase_source : 01b387b7e5bf2f21d6af1afcccf6ec0d7e8a2ac7
