`offset` is user supplied variable and may be bigger than
`ts_obj_length`. There is no need to subtract them and pass along, so
just throw when the subtraction result would overflow.
PR-URL: https://github.com/nodejs/node/pull/7494
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
* Speed up buffer.swap16 and swap32 by using builtins. Up to ~6x gain.
Drop transition point between JS and C++ implementations accordingly.
Amount of performance improvement not only depends on buffer size but
also memory alignment.
* Fix tests: C++ impl tests were testing 0-filled buffers so were
always passing.
* Add similar buffer.swap64 method.
* Make buffer-swap benchmark mirror JS impl.
doc/api/buffer.markdown has an entry of "added: REPLACEME" that should
be changed to the correct release number before tagged.
Because node is currently using a very old version of cpplint.py it
doesn't know that std::swap() has moved from <algorithm> to <utility> in
c++11. So until cpplint.py is updated simply NOLINT the line.
Technically it should be NOLINT(build/include_what_you_use), but that
puts the line over 80 characters causing another lint error.
PR-URL: https://github.com/nodejs/node/pull/7157
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
When node began using the OneByte API (f150d56) it also switched to
officially supporting ISO-8859-1. Though at the time no new encoding
string was introduced.
Introduce the new encoding string 'latin1' to be more explicit. The
previous 'binary' and documented as an alias to 'latin1'. While many
tests have switched to use 'latin1', there are still plenty that do both
'binary' and 'latin1' checks side-by-side to ensure there is no
regression.
PR-URL: https://github.com/nodejs/node/pull/7111
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Improves performance of allocating unsafe buffers, creating buffers from
an existing ArrayBuffer and creating .slice(...) from existing Buffer by
avoiding deoptimizing change of prototype after Uint8Array allocation
in favor of ES6 native subclassing.
This is done through an internal ES6 class that extends Uint8Array and
is used for allocations, but the regular Buffer function is exposed, so
calling Buffer(...) with or without `new` continues to work as usual
and prototype chains are also preserved.
Performance wins for .slice are +120% (2.2x), and, consequently, for
unsafe allocations up to +95% (1.9x) for small buffers, and for safe
allocations (zero-filled) up to +30% (1.3x).
PR-URL: https://github.com/nodejs/node/pull/6893
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Remove the direct dependency on node::Environment (which is per-context)
from node::ArrayBufferAllocator (which is per-isolate.)
Contexts that want to toggle the zero fill flag, now do so through a
field that is owned by ArrayBufferAllocator. Better, still not great.
PR-URL: https://github.com/nodejs/node/pull/7082
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Fix `buffer.indexOf` for the case that the haystack has odd length
and the needle is not found in it. `StringSearch()` would return
the length of the buffer in multiples of `sizeof(uint16_t)`, but
checking that against `haystack_length` would not work if the latter
one was odd.
PR-URL: https://github.com/nodejs/node/pull/6511
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Use `StringBytes::Size` to determine the needle string length
instead of assuming latin-1 or UTF-8.
Previously, `Buffer.indexOf` could fail with an assertion failure
when the needle's byte length, but not its character count,
exceeded the haystack's byte length.
PR-URL: https://github.com/nodejs/node/pull/6511
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
* Remove unnecessary templating from SearchString
SearchString used to have separate PatternChar and SubjectChar template type
arguments, apparently to support things like searching for an 8-bit string
inside a 16-bit string or vice versa. However, SearchString is only used from
node_buffer.cc, where PatternChar and SubjectChar are always the same. Since
this is extra complexity that's unused and untested (simplifying to a single
Char template argument still compiles and didn't break any unit tests), I
removed it.
* Use Boyer-Hoore[-Horspool] for both indexOf and lastIndexOf
Add test cases for lastIndexOf. Test the fallback from BMH to
Boyer-Moore, which looks like it was totally untested before.
* Extra bounds checks in node_buffer.cc
* Extra asserts in string_search.h
* Buffer.lastIndexOf: clean up, enforce consistency w/ String.lastIndexOf
* Polyfill memrchr(3) for non-GNU systems
PR-URL: https://github.com/nodejs/node/pull/4846
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Recent phantom weakness API changes to buffer, ebbbc5a, ending up
introducing an alignment restriction on the native buffer pointers.
It turns out that there are uses in the modules ecosystem that rely
on the ability to create buffers with unaligned pointers (e.g.
node-ffi).
It turns out there is a simpler solution possible here. As a side
effect this also removes the need to have to reserve the first
internal field on buffers.
PR-URL: https://github.com/nodejs/node/pull/5752
Reviewed-By: trevnorris - Trevor Norris <trev.norris@gmail.com>
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Old style SetWeak is now deprecated, and weakness now works like
phantom references. This means we no longer have a reference to the
object in the weak callback. We use a kInternalFields style weak
callback which provides us with the contents of 2 internal fields
where we can squirrel away the native buffer pointer.
We can no longer neuter the buffer in the weak callback, but that
should be unnecessary as the object is going to be GC'd during the
current gc cycle.
PR-URL: https://github.com/nodejs/node/pull/5204
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: indutny - Fedor Indutny <fedor.indutny@gmail.com>
Dynamic checks that CallbackInfo holds an ArrayBuffer handle can be
converted into compiler enforced checks. Removed unused code, and
other minor cleanup.
PR-URL: https://github.com/nodejs/node/pull/5204
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: indutny - Fedor Indutny <fedor.indutny@gmail.com>
Can now call fill() using following parameters if value is a String:
fill(string[, start[, end]][, encoding])
And with the following if value is a Buffer:
fill(buffer[, start[, end]])
The encoding is ignored if value is not a String. All other non-Buffer
values are coerced to a uint32.
A multibyte strings will simply be copied into the Buffer until the
number of bytes run out. Meaning partial strings can be left behind:
Buffer(3).fill('\u0222');
// returns: <Buffer c8 a2 c8>
In some encoding cases, such as 'hex', fill() will throw if the input
string is not valid.
PR-URL: https://github.com/nodejs/node/pull/4935
Reviewed-By: James M Snell <jasnell@gmail.com>
If the needle contains an extended latin-1 character then using
String::Utf8Length() will be too large and the search will return early.
Instead use String::Length() when encoding is BINARY.
PR-URL: https://github.com/nodejs/node/pull/4803
Reviewed-By: James M Snell <jasnell@gmail.com>
Versions of Node.js after v0.12 have relocated byte-swapping away from
the StringBytes::Encode function, thereby causing a nan test (which
accesses this function directly) to fail on big-endian machines.
This change re-introduces byte swapping in StringBytes::Encode,
done via a call to a function in util-inl. Another change in
NodeBuffer::StringSlice was necessary to avoid double byte swapping
in big-endian function calls to StringSlice.
PR-URL: https://github.com/nodejs/node/pull/3410
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Documentation currently states that setting noAssert and passing a value
larger than can fit in the Buffer will cause data to be silently
dropped. Change implementation to match documented behavior.
Fixes: https://github.com/nodejs/node/issues/3766
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Neuter external `nullptr` buffers, otherwise their contents will be
materialized on access, and the buffer instance will be internalized.
This leads to a crash like this:
v8::ArrayBuffer::Neuter Only externalized ArrayBuffers can be
neutered
Fix: #3619
PR-URL: https://github.com/nodejs/node/pull/3624
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Adds the string search implementation from v8
which uses naive search if pattern length < 8
or to a specific badness then uses Boyer-Moore-Horspool
Added benchmark shows the expected improvements
Added option to use ucs2 encoding with Buffer::IndexOf
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/2539
FreeCallback should be invoked on the storage disposal (`ArrayBuffer`),
not when the view (`Uint8Array` or `Buffer`) is disposed. This causes
bug and crashes in addons which create buffers and store only slices of
them.
PR-URL: https://github.com/nodejs/node/pull/3198
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Native Buffer method calls do not require anything from the prototype.
So it is unnecessary to check if the Object's prototype is equal to
Buffer.prototype.
This fixes an issue that prevents Buffer from being inherited the ES5
way. Now the following will work:
function A(n) {
const b = new Buffer(n);
Object.setPrototypeOf(b, A.prototype);
return b;
}
Object.setPrototypeOf(A.prototype, Buffer.prototype);
Object.setPrototypeOf(A, Buffer);
console.log(new A(4));
Fix: https://github.com/nodejs/node/issues/2882
PR-URL: https://github.com/nodejs/node/pull/3080
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Overall construction time of Typed Arrays is faster in JS, but the
problem with using it normally is zero-fill of memory. Get around this
by using a flag in the ArrayBuffer::Allocator to trigger when memory
should or shouldn't be zero-filled.
Remove Buffer::Create() as it is no longer called.
The creation of the Uint8Array() was done at each callsite because at
the time of this patch there was a performance penalty for centralizing
the call in a single function.
PR-URL: https://github.com/nodejs/node/pull/2866
Reviewed-By: Fedor Indutny <fedor@indutny.com>
Throwing a JS error from C++ does not mean the function will return
early. This must be done manually.
Also remove extraneous comment no longer relevant.
Fix: 2903030 "buffer: switch API to return MaybeLocal<T>"
PR-URL: https://github.com/nodejs/io.js/pull/2225
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Upgrade the bundled V8 and update code in src/ and lib/ to the new API.
Notable backwards incompatible changes are the removal of the smalloc
module and dropped support for CESU-8 decoding. CESU-8 support can be
brought back if necessary by doing UTF-8 decoding ourselves.
This commit includes https://codereview.chromium.org/1192973004 to fix
a build error on python 2.6 systems. The original commit log follows:
Use optparse in js2c.py for python compatibility
Without this change, V8 won't build on RHEL/CentOS 6 because the
distro python is too old to know about the argparse module.
PR-URL: https://github.com/nodejs/io.js/pull/2022
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Starting in V8 v4.3 the maximum array index of a typed array is the same
as the largest Smi supported on a given architecture. To compensate for
these differences export kMaxLength from the buffer module with the
correct size for the given architecture.
PR-URL: https://github.com/nodejs/io.js/pull/2003
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Address comments and deprecations left in source files. These changes
include:
* Remove the deprecated API.
* Change Buffer::New() that did a copy of the data to Buffer::Copy()
* Change Buffer::Use() to Buffer::New()
PR-URL: https://github.com/nodejs/io.js/pull/1825
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Instead of aborting in case of internal failure, return an empty
Local<Object>. Using the MaybeLocal<T> API, users must check their
return values.
PR-URL: https://github.com/nodejs/io.js/pull/1825
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
