feature: Buffer.lastIndexOf by dcposch · Pull Request #4846 · nodejs/node

dcposch · 2016-01-24T22:39:49Z

Fixes#4604

work done

Added support for Buffer.lastIndexOf to match Buffer.indexOf
Can search for a string, another Buffer, or a specific byte value, consistent with Buffer.indexOf
For specific byte values, behavior is consistent with Uint8Array.lastIndexOf, which is now shadowed by Buffer.lastIndexOf, so existing code should continue to work
Added test cases

work left to do

Optimization. The implementation of reverse search in string_search.cc is naive and just uses a double for loop. Ideally we'd adapt BoyerMooreSearch to support reverse search, so that lastIndexOf will be equally fast as indexOf

Fishrock123 · 2016-01-24T22:55:36Z

cc @trevnorris :)

mikeal · 2016-01-25T17:25:03Z

Oh wow, I've been waiting years for this :)

This should make writing parsers a lot nicer :)

dcposch · 2016-01-27T17:56:53Z

@mikeal cool. I think I'm more or less done!
Let me know if it looks reasonable.

performance

I've refactored so that both lastIndexOf and indexOf use the same fast algorithms: Boyer-Moore / Boyer-Moore-Horspool.

To do this with a minimum of messiness and without any code duplication, I expanded the Vector<Char> class that was already in string_search.h so that it can provide a reversed view onto a the underlying buffer. Then, the existing algorithms (Linear, Boyer-Moore, Boyer-Moore-Horspool) can be applied unmodified.

This works because lastIndexOf(haystack, needle) can be calculated from indexOf(reverse(haystack), reverse(needle)). Reversing the inputs is done via a lightweight view onto the original input buffer: it's not actually copying the buffers or doing anything slow like that.

testing

I added some additional test cases, to make sure that all of the search algorithms were being exercised.

(Background: Under the hood, the existing indexOf starts with Linear search, then if that's too slow, switches to Boyer-Moore-Horspool, which requires only a quick precomputation but has O(nm) worst-case complexity for finding a needle of size m in a haystack of size n. Finally, if that turns out to be too slow, it switches to Boyer-Moore, which requires more precomputation but has linear worst-case complexity.)

Surprisingly, the existing test cases never seem to exercise the Boyer-Moore fallback at all!

I added a test case that does go there.

If you want to reproduce the output below, compile with DEBUG_STRING_SEARCH defined and add a failing assertion to the bottom of test-buffer-indexof.js (otherwise the test runner swallows the output).

=== release test-buffer-indexof === Path: parallel/test-buffer-indexof
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search BOYER-MOORE-HORSPOOL
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search LINEAR
forward search LINEAR
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search BOYER-MOORE-HORSPOOL
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR
forward search LINEAR

(Above: existing test cases for indexOf. Note it never runs Boyer-Moore.)

(Below: new test cases, added in this PR, for lastIndexOf. Uses the same code to do all the heavy lifting, no code duplication. Tests Boyer-Moore.)

reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search LINEAR
reverse search BOYER-MOORE-HORSPOOL
reverse search BOYER-MOORE-HORSPOOL
reverse search BOYER-MOORE-HORSPOOL
reverse search BOYER-MOORE
reverse search BOYER-MOORE-HORSPOOL
reverse search BOYER-MOORE
reverse search BOYER-MOORE-HORSPOOL
reverse search BOYER-MOORE

dcposch · 2016-01-27T18:22:56Z

Also, this PR uses memrchr to search for a single byte value in a Buffer, back to front. Like memchr, it's a lot faster than just looping over bytes.

Unfortunately memrchr is a GNU extension, not part of POSIX like memchr.

Does Node have to compile in places where memrchr isn't available?
If so, should I find a polyfill, for example this one?
https://github.com/c9/node-gnu-tools/blob/master/grep-src/lib/memrchr.c
Alternatively, we can use the magic bits method described here:
http://cebka.blogspot.com/2015/04/how-fast-is-your-memchr.html

feross · 2016-01-28T14:48:07Z

Thanks for tackling this PR, @dcposch!

trevnorris · 2016-01-28T23:56:05Z

Faster to do IsTrue()

trevnorris · 2016-01-29T00:27:13Z

Started to review, but have to step away. Will finish this tomorrow.

@dcposch Nice job on the inline comments. Makes the patch easier to follow. Especially for one this size.

dcposch · 2016-01-29T00:45:00Z

@trevnorris thx. Fixed all the things you pointed out so far

trevnorris · 2016-01-29T23:08:29Z

This shouldn't be necessary. To follow string.lastIndexOf() the offset should be coerced to a primitive. So for example 'abcde'.lastIndexOf('c', [1]) === -1. Basically the byteOffset >>= 0 below should be enough.

I think we need this to match the behavior of Buffer.indexOf
buf.indexOf('foo') searches the whole buffer, as does buf.indexOf('foo', null), buf.indexOf('foo', 'foo'), etc
buf.indexOf('foo', 0) searches starting from index 0, which also searches the whole buffer
buf.lastIndexOf('foo') should def search the whole buffer, but
buf.lastIndexOf('foo', 0) does a reverse search starting from index 0, so it only checks for a match at index 0
So a minimum, we have to special-case undefined
I think it's best if buf.lastIndexOf('foo', null), buf.lastIndexOf('foo', NaN) etc match buf.lastIndexOf('foo') -- in other words, they should search the whole buffer. That means they're NOT equivalent to buf.lastIndexOf('foo', 0)

I agree. The operation is as simple as offset = +offset. This will coerce all isNaN() values to NaN, which can then be checked by Number.isNaN(). It will also coerce values like [2] to 2, which is also how String#lastIndexOf() operates.
So any value that returns true for Number.isNaN() after the coercion is set to the default value. Though note this does exclude null. Which is the same way strings work. e.g. 'abc'.lastIndexOf('b', null) === -1.

fixed. i added a test case to ensure 'abc'.lastIndexOf('b', null) === -1

dcposch · 2016-02-01T02:47:15Z

@trevnorris notice me senpai

Fishrock123 · 2016-02-01T15:59:58Z

@dcposch some of us who work on this more do take the weekends off. ;)

trevnorris · 2016-02-01T21:19:24Z

@bnoordhuis have any comments on this?

I'd leave this out.

Removed. Note though that this was the only way I noticed some serious missing test coverage: the whole Boyer-Moore algorithm (nontrivial code, rarely exercised) was never reached by the unit tests before. (The unit tests previously only cover Boyer-Moore-Horspool, Linear, and Single-Char. After this PR they cover Boyer-Moore as well.)

trevnorris · 2016-02-01T21:23:32Z

@dcposch Left few more comments. Now that the weekend is over will be more attentive. :)

dcposch · 2016-02-02T06:40:50Z

@trevnorris fixed. Thanks for checking it out!

trevnorris · 2016-02-02T21:01:20Z

Excellent work. CI: https://ci.nodejs.org/job/node-test-pull-request/1515/

dcposch · 2016-02-02T23:26:08Z

@trevnorris I clicked Authorize, but it says

Access Denied
dcposch is missing the Overall/Read permission

rvagg · 2016-02-03T02:55:04Z

Sorry @dcposch, we have CI in lockdown until we get our security releases out, you'll have to rely on collaborators to get you info on how the jobs have gone until it's opened back up again next week. / #4857

There are compile errors on OSX:

In file included from ../src/node_buffer.cc:7:
../src/string_search.h:287:11: error: use of undeclared identifier 'memrchr'; did you mean 'memchr'?
pos = memrchr(subject.start(), pattern_first_char, subj_len - index);
^~~~~~~
memchr
/usr/include/string.h:70:7: note: 'memchr' declared here
void *memchr(const void *, int, size_t);
^
../src/node_buffer.cc:1061:11: error: use of undeclared identifier 'memrchr'; did you mean 'memchr'?
ptr = memrchr(ts_obj_data, needle, offset + 1);
^~~~~~~
memchr
/usr/include/string.h:70:7: note: 'memchr' declared here
void *memchr(const void *, int, size_t);
^
In file included from ../src/node_buffer.cc:7:
../src/string_search.h:252:18: error: use of undeclared identifier 'memrchr'
void_pos = memrchr(subject.start(), search_byte, bytes_to_search);
^
../src/string_search.h:308:10: note: in instantiation of function template specialization 'node::stringsearch::FindFirstCharacter<unsigned short>' requested here
return FindFirstCharacter(search->pattern_, subject, index);
^
../src/string_search.h:107:22: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::SingleCharSearch' requested here
strategy_ = &SingleCharSearch;
^
../src/string_search.h:607:22: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::StringSearch' requested here
StringSearch<Char> search(pattern);
^
../src/string_search.h:636:36: note: in instantiation of function template specialization 'node::stringsearch::SearchString<unsigned short>' requested here
size_t pos = node::stringsearch::SearchString(
^
../src/node_buffer.cc:928:16: note: in instantiation of function template specialization 'node::SearchString<unsigned short>' requested here
result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
^
In file included from ../src/node_buffer.cc:7:
../src/string_search.h:326:9: error: no matching function for call to 'FindFirstCharacter'
i = FindFirstCharacter(pattern, subject, i);
^~~~~~~~~~~~~~~~~~
../src/string_search.h:110:20: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::LinearSearch' requested here
strategy_ = &LinearSearch;
^
../src/string_search.h:607:22: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::StringSearch' requested here
StringSearch<Char> search(pattern);
^
../src/string_search.h:636:36: note: in instantiation of function template specialization 'node::stringsearch::SearchString<unsigned short>' requested here
size_t pos = node::stringsearch::SearchString(
^
../src/node_buffer.cc:928:16: note: in instantiation of function template specialization 'node::SearchString<unsigned short>' requested here
result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
^
../src/string_search.h:235:15: note: candidate template ignored: substitution failure [with Char = unsigned short]
inline size_t FindFirstCharacter(Vector<const Char> pattern,
^
../src/string_search.h:575:11: error: no matching function for call to 'FindFirstCharacter'
i = FindFirstCharacter(pattern, subject, i);
^~~~~~~~~~~~~~~~~~
../src/string_search.h:113:18: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::InitialSearch' requested here
strategy_ = &InitialSearch;
^
../src/string_search.h:607:22: note: in instantiation of member function 'node::stringsearch::StringSearch<unsigned short>::StringSearch' requested here
StringSearch<Char> search(pattern);
^
../src/string_search.h:636:36: note: in instantiation of function template specialization 'node::stringsearch::SearchString<unsigned short>' requested here
size_t pos = node::stringsearch::SearchString(
^
../src/node_buffer.cc:928:16: note: in instantiation of function template specialization 'node::SearchString<unsigned short>' requested here
result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
^
../src/string_search.h:235:15: note: candidate template ignored: substitution failure [with Char = unsigned short]
inline size_t FindFirstCharacter(Vector<const Char> pattern,
^
5 errors generated.
make[2]: *** [/Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/out/Release/obj.target/node/src/node_buffer.o] Error 1
make[2]: *** Waiting for unfinished jobs....
c++ '-D_DARWIN_USE_64_BIT_INODE=1' '-DNODE_ARCH="x64"' '-DNODE_WANT_INTERNALS=1' '-DV8_DEPRECATION_WARNINGS=1' '-DHAVE_OPENSSL=1' '-DHAVE_DTRACE=1' '-D__POSIX__' '-DNODE_PLATFORM="darwin"' '-DHTTP_PARSER_STRICT=0' '-D_LARGEFILE_SOURCE' '-D_FILE_OFFSET_BITS=64' -I../src -I../tools/msvs/genfiles -I../deps/uv/src/ares -I/Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/out/Release/obj/gen -I../deps/v8 -I../deps/cares/include -I../deps/v8/include -I../deps/openssl/openssl/include -I../deps/zlib -I../deps/http_parser -I../deps/uv/include -Os -gdwarf-2 -mmacosx-version-min=10.5 -arch x86_64 -Wall -Wendif-labels -W -Wno-unused-parameter -std=gnu++0x -fno-rtti -fno-exceptions -fno-threadsafe-statics -fno-strict-aliasing -MMD -MF /Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/out/Release/.deps//Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/out/Release/obj.target/node/src/tls_wrap.o.d.raw -c -o /Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/out/Release/obj.target/node/src/tls_wrap.o ../src/tls_wrap.cc
In file included from ../src/string_search.cc:1:
../src/string_search.h:287:11: error: use of undeclared identifier 'memrchr'; did you mean 'memchr'?
pos = memrchr(subject.start(), pattern_first_char, subj_len - index);
^~~~~~~
memchr
/usr/include/string.h:70:7: note: 'memchr' declared here
void *memchr(const void *, int, size_t);
^
1 error generated.

Windows

c:\workspace\node-compile-windows\label\win-vs2013\src\string_search.h(287): error C3861: 'memrchr': identifier not found (src\node_buffer.cc) [c:\workspace\node-compile-windows\label\win-vs2013\node.vcxproj]

smartos

In file included from ../src/node_buffer.cc:7:0:
../src/string_search.h: In function 'std::size_t node::stringsearch::FindFirstCharacter(node::stringsearch::Vector<const Char>, node::stringsearch::Vector<const Char>, std::size_t) [with Char = unsigned char; std::size_t = long unsigned int]':
../src/string_search.h:287:72: error: 'memrchr' was not declared in this scope
pos = memrchr(subject.start(), pattern_first_char, subj_len - index);
^
../src/node_buffer.cc: In function 'void node::Buffer::IndexOfNumber(const v8::FunctionCallbackInfo<v8::Value>&)':
../src/node_buffer.cc:1061:50: error: 'memrchr' was not declared in this scope
ptr = memrchr(ts_obj_data, needle, offset + 1);
^
In file included from ../src/node_buffer.cc:7:0:
../src/string_search.h: In instantiation of 'size_t node::stringsearch::FindFirstCharacter(node::stringsearch::Vector<const Char>, node::stringsearch::Vector<const Char>, size_t) [with Char = short unsigned int; size_t = long unsigned int]':
../src/string_search.h:308:61: required from 'static size_t node::stringsearch::StringSearch<Char>::SingleCharSearch(node::stringsearch::StringSearch<Char>*, node::stringsearch::Vector<const Char>, size_t) [with Char = short unsigned int; size_t = long unsigned int]'
../src/string_search.h:107:21: required from 'node::stringsearch::StringSearch<Char>::StringSearch(node::stringsearch::Vector<const Char>) [with Char = short unsigned int]'
../src/string_search.h:607:36: required from 'size_t node::stringsearch::SearchString(node::stringsearch::Vector<const Char>, node::stringsearch::Vector<const Char>, size_t) [with Char = short unsigned int; size_t = long unsigned int]'
../src/string_search.h:637:49: required from 'size_t node::SearchString(const Char*, size_t, const Char*, size_t, size_t, bool) [with Char = short unsigned int; size_t = long unsigned int]'
../src/node_buffer.cc:933:39: required from here
../src/string_search.h:252:71: error: 'memrchr' was not declared in this scope
void_pos = memrchr(subject.start(), search_byte, bytes_to_search);
^
node.target.mk:157: recipe for target '/home/iojs/build/workspace/node-test-commit-smartos/nodes/smartos14-64/out/Release/obj.target/node/src/node_buffer.o' failed
make[2]: *** [/home/iojs/build/workspace/node-test-commit-smartos/nodes/smartos14-64/out/Release/obj.target/node/src/node_buffer.o] Error 1

the test also failed to run on armv8 but that was a jenkins problem as far as I can tell.

Looks like there's still quite a bit of work to do on cross-platform compat here.

dcposch · 2016-02-03T23:45:26Z

@rvagg @trevnorris thanks!

Yeah this goes back to my first question at the top of the PR, about whether node builds can use memrchr. Looks like they can on some systems but not on others.

I added a fallback for those systems. LMK if the CI is happier now!

jasnell · 2016-04-08T23:30:22Z

Whatever makes it in before I start working on it on Monday ;)
On Apr 8, 2016 4:29 PM, "Trevor Norris" notifications@github.com wrote:

@jasnell https://github.com/jasnell If this lands before Monday, could
it make it in, or have all the RC commits been chosen?
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#4846 (comment)

trevnorris · 2016-04-15T09:33:50Z

Seems there's a minor performance hit with this PR, but I believe it's within an acceptable level. Anyone have any objections? If not then let's land it.

Fishrock123 · 2016-04-15T20:46:46Z

🚢

jasnell · 2016-04-15T21:03:10Z

Works for me.

jasnell · 2016-04-22T04:23:47Z

@trevnorris ... there's still time to get this in. Is it ready to go?
@dcposch ... can you rebase?

dcposch · 2016-04-22T07:19:15Z

@dcposch ... can you rebase?

@jasnell yes, will be done v soon

* 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

dcposch · 2016-04-23T02:30:09Z

@jasnell fixed

jasnell · 2016-04-23T02:38:50Z

One final CI before landing: https://ci.nodejs.org/job/node-test-pull-request/2371/

dcposch · 2016-04-23T03:39:57Z

@jasnell looks like test-tls-inception failed on FreeBSD and tests passed on the other platforms. I don't know if it's related to this change--looks unlikely. Want to try re-running it?

Failing build: https://ci.nodejs.org/job/node-test-commit-freebsd/2167/
Failing test: https://ci.nodejs.org/job/node-test-commit-freebsd/2167/nodes=freebsd10-64/tapTestReport

jasnell · 2016-04-23T04:02:45Z

New CI: https://ci.nodejs.org/job/node-test-pull-request/2372/

dcposch · 2016-04-23T08:57:17Z

Sweet, everything worked that time including FreeBSD

* 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: #4846 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com>

jasnell · 2016-04-25T15:27:15Z

Landed in 6c1e5ad

* 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: nodejs#4846 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com>

trevnorris · 2016-04-25T22:48:35Z

@jasnell Was the squash/merge button used? I'm trying to figure out why the Author: field was changed from the listed commits.

jasnell · 2016-04-25T22:52:22Z

No, I squashed like normal. Didn't notice that the author changed :-/
On Apr 25, 2016 3:48 PM, "Trevor Norris" notifications@github.com wrote:

@jasnell https://github.com/jasnell Was the squash/merge button used?
I'm trying to figure out why the Author: field was changed from the
listed commits.
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#4846 (comment)

trevnorris · 2016-04-25T23:17:51Z

Strange. Oh well. Nothing serious.

* 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: #4846 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com>

silverwind added buffer Issues and PRs related to the buffer subsystem. semver-minor PRs that contain new features and should be released in the next minor version. labels Jan 24, 2016

dcposch force-pushed the master branch from 513e147 to 76db857Compare January 27, 2016 18:10

jasnell added the wip Issues and PRs that are still a work in progress. label Jan 27, 2016

This was referenced Jan 28, 2016
Add Buffer.prototype.lastIndexOf() #4604
Closed
doc: add Buffer.lastIndexOf #4933
Closed

dcposch force-pushed the master branch from 76db857 to ffcec20Compare January 28, 2016 23:20

trevnorris reviewed Jan 28, 2016
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dcposch force-pushed the master branch from 6568b36 to 0949815Compare February 3, 2016 23:51

dcposch added 2 commits April 22, 2016 15:45

doc: for Buffer.lastIndexOf
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dcposch force-pushed the master branch from 766a972 to 698ed92Compare April 23, 2016 02:27

jasnell added this to the 6.0.0 milestone Apr 23, 2016

jasnell closed this Apr 25, 2016

vitaly-t mentioned this pull request Apr 27, 2016
Doesn't work under Node.js 6.0.0 brianc/node-postgres#1000
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feross mentioned this pull request Apr 28, 2016
Add missing .lastIndexOf method feross/buffer#114
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addaleax added dont-land-on-v5.x labels May 3, 2016

vsemozhetbyt mentioned this pull request Nov 26, 2016
byteOffset argument in buffer indexOf / lastIndexOf has some contradictions in code vs doc vs test #9801
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dcposch commented Jan 24, 2016

work done

work left to do

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Fishrock123 commented Jan 24, 2016

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dcposch commented Jan 27, 2016

performance

testing

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trevnorris commented Feb 1, 2016

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dcposch commented Feb 2, 2016

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trevnorris commented Feb 2, 2016

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dcposch commented Feb 2, 2016

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rvagg commented Feb 3, 2016

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dcposch commented Feb 3, 2016

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jasnell commented Apr 8, 2016

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trevnorris commented Apr 15, 2016

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Fishrock123 commented Apr 15, 2016

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jasnell commented Apr 15, 2016

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jasnell commented Apr 22, 2016

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dcposch commented Apr 22, 2016

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dcposch commented Apr 23, 2016

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jasnell commented Apr 23, 2016

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dcposch commented Apr 23, 2016

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jasnell commented Apr 23, 2016

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dcposch commented Apr 23, 2016

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jasnell commented Apr 25, 2016

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trevnorris commented Apr 25, 2016