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69 Commits

Author SHA1 Message Date
Andrew Gerrand
b15b0a0cd9 bytes: fix typo in AddByte comment 
Fixes #1140.

R=golang-dev
CC=golang-dev
https://golang.org/cl/2240043
 2010-09-27 11:41:43 +10:00
Roger Peppe
81ba399a6a bytes, strings: change lastIndexFunc to use DecodeLastRune 
R=r
CC=golang-dev, rsc
https://golang.org/cl/2271041
 2010-09-23 20:40:11 +10:00
Rob Pike
1959c3ac5b tests: fix prints 
- delete unnecessary newlines
- make sure formatted prints call the formatting routines

R=adg
CC=golang-dev
https://golang.org/cl/2225046
 2010-09-23 13:48:56 +10:00
Russ Cox
da392d9136 build: no required environment variables 
R=adg, r, PeterGo
CC=golang-dev
https://golang.org/cl/1942044
 2010-08-18 10:08:49 -04:00
Christian Himpel
75f6a0c759 bytes: add IndexRune, FieldsFunc and To*Special 
Basically these functions are implemented the same way as the
corresponding functions in the strings package.  Test functions
are implemented for IndexRune and FieldsFunc.

Additionally two typos are fixed in packages bytes and strings.

R=r
CC=golang-dev
https://golang.org/cl/1696062
 2010-08-05 23:11:06 +10:00
Scott Lawrence
99aab8bacb bytes: added test case for explode with blank string. 
Tests for the equivalent of the strings.explode("") panic bug (issue 980).

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/1850052
 2010-08-04 13:33:24 +10:00
Andrew Gerrand
8b821696cc bytes, strings: mention the n < 0 case in Split/SplitAfter doc comment 
R=r, rsc
CC=golang-dev
https://golang.org/cl/1669055
 2010-07-27 15:06:08 +10:00
Fazlul Shahriar
e356f1d88f bytes: port IndexFunc and LastIndexFunc from strings package 
This CL basically applies the same changes as

	http://code.google.com/p/go/source/detail?r=5e0a29014e8e

but for bytes package.

R=r, rog
CC=golang-dev
https://golang.org/cl/1670052
 2010-07-23 12:34:35 -07:00
Andrey Mirtchovski
8629e5a648 strings.Bytes: fix typo in comment 
R=adg, rsc
CC=golang-dev
https://golang.org/cl/1886042
 2010-07-21 12:01:15 -07:00
Rob Pike
de228c0e0c bytes: add Title 
R=rsc
CC=golang-dev
https://golang.org/cl/1872042
 2010-07-20 19:53:59 -07:00
Rob Pike
38f1231f3e strings and bytes.Split: make count of 0 mean 0, not infinite. 
Use a count of -1 for infinity.  Ditto for Replace.

R=rsc
CC=golang-dev
https://golang.org/cl/1704044
 2010-07-01 14:08:14 -07:00
Russ Cox
0bf413ab8e bytes, strings: add Replace 
This is the Replace I suggested in the review of CL 1114041.
It's true that we already have

	regexp.MustCompile(regexp.QuoteMeta(old)).ReplaceAll(s, new)

but because this Replace is doing a simpler job it is
simpler to call and inherently more efficient.

I will add the bytes implementation and tests to the
CL after the strings one has been reviewed.

R=r, cw
CC=golang-dev
https://golang.org/cl/1731048
 2010-06-30 18:03:09 -07:00
Russ Cox
44ca04d3d6 big, bytes: move assembly externs to separate file 
to make it easier to build package without assembly.

R=r, r2
CC=golang-dev
https://golang.org/cl/1680045
 2010-06-21 19:53:08 -07:00
Rob Pike
9baa7a51ba bytes.Buffer.ReadFrom: fix bug. 
Fixes #852.

R=rsc
CC=golang-dev
https://golang.org/cl/1680042
 2010-06-15 17:40:47 -07:00
Russ Cox
bb84f4b5d2 changes &x -> x[0:] for array to slice conversion 
R=gri
CC=golang-dev
https://golang.org/cl/1326042
 2010-05-27 14:51:47 -07:00
Michael Hoisie
4a3cb1ad2f bytes: add Trim, TrimLeft, TrimRight, and generic functions 
R=rsc, r
CC=golang-dev
https://golang.org/cl/946045
 2010-05-18 23:01:05 -07:00
Rob Pike
e1d20d0a51 bytes: Change IndexAny to look for UTF-8 encoded characters. 
Also improve the implementations of Equals and Compare.

R=rsc
CC=golang-dev
https://golang.org/cl/969047
 2010-05-03 10:59:00 -07:00
Russ Cox
78551a9b43 bytes: add Next method to Buffer, simplify Read. 
R=r
CC=golang-dev
https://golang.org/cl/980043
 2010-04-26 10:02:01 -07:00
Russ Cox
1baf35e41f bytes: shuffle implementation, making WriteByte 50% faster 
R=r
CC=golang-dev
https://golang.org/cl/920041
 2010-04-14 01:52:56 -07:00
Russ Cox
00f9f0c056 single argument panic 
note that sortmain.go has been run through hg gofmt;
only the formatting of the day initializers changed.
i'm happy to revert that formatting if you'd prefer.

stop on error in doc/progs/run

R=r
CC=golang-dev
https://golang.org/cl/850041
 2010-03-30 10:34:57 -07:00
Robert Griesemer
d0ffee8abf bytes, strings: IndexOfAny 
+ first use in go/doc

R=r
CC=golang-dev
https://golang.org/cl/781041
 2010-03-26 13:05:04 -07:00
Rob Pike
8c9944d8c8 bufio: WriteRune 
also fix a printing error in the test for bytes.Buffer

R=golang-dev
CC=golang-dev
https://golang.org/cl/240042
 2010-03-05 14:03:17 -08:00
Rob Pike
0ac5ef70db Add ReadRune and WriteRune to bytes.Buffer 
The comments mention bufio's WriteRune, which should come next.

R=rsc
CC=golang-dev
https://golang.org/cl/245041
 2010-03-05 11:34:53 -08:00
Russ Cox
9750adbbad strings: delete Runes, Bytes 
gofmt -w -r 'strings.Bytes(a) -> []byte(a)' src/cmd src/pkg test/bench
gofmt -w -r 'strings.Runes(a) -> []int(a)' src/cmd src/pkg test/bench
delete unused imports

R=r
CC=golang-dev
https://golang.org/cl/224062
 2010-02-25 16:01:29 -08:00
Robert Griesemer
cd72f77f23 apply gofmt to src and misc 
R=rsc
CC=golang-dev
https://golang.org/cl/213041
 2010-02-17 15:46:46 -08:00
Russ Cox
718be3215f in C and asm, replace pkg·name with ·name 
(eliminate assumption of package global name space,
make code easier to move between packages).

R=r
CC=golang-dev
https://golang.org/cl/194072
 2010-01-25 18:52:55 -08:00
Yongjian Xu
ca0def6659 Remove redundant size check in resize. Let callers worry about that and resize should just do "resize". 
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/181111
 2010-01-02 11:09:22 +11:00
Rob Pike
1f0e6a4c99 new comments for bytes.NewBuffer and NewBufferString. 
corrects a common misunderstanding about NewBuffer.

R=rsc
CC=golang-dev
https://golang.org/cl/179106
 2009-12-19 08:42:31 +11:00
Andrey Mirtchovski
7f501c06f7 bytes, strings: add new function Fields 
R=rsc, r, phf
CC=golang-dev
https://golang.org/cl/170046
 2009-12-15 21:09:55 -08:00
Robert Griesemer
5a1d3323fe 1) Change default gofmt default settings for 
parsing and printing to new syntax.

                  Use -oldparser to parse the old syntax,
                  use -oldprinter to print the old syntax.

               2) Change default gofmt formatting settings
                  to use tabs for indentation only and to use
                  spaces for alignment. This will make the code
                  alignment insensitive to an editor's tabwidth.

                  Use -spaces=false to use tabs for alignment.

               3) Manually changed src/exp/parser/parser_test.go
                  so that it doesn't try to parse the parser's
                  source files using the old syntax (they have
                  new syntax now).

               4) gofmt -w src misc test/bench

	       1st set of files.

R=rsc
CC=agl, golang-dev, iant, ken2, r
https://golang.org/cl/180047
 2009-12-15 15:33:31 -08:00
Rob Pike
d14c813377 When the buffer is empty, reset b.off to the beginning of the buffer 
to avoid growing unnecessarily.

R=rsc
CC=golang-dev
https://golang.org/cl/176071
 2009-12-14 13:13:01 +11:00
Kei Son
128974adfd bytes, strings: allow -1 in Map to mean "drop this character". 
xml: drop invalid characters in attribute names
    when constructing struct field names.

R=rsc
CC=r
https://golang.org/cl/157104
 2009-12-11 10:37:48 -08:00
Christopher Wedgwood
8c22dd24e0 Remove copyBytes completely in favor of copy. 
R=r, rsc
https://golang.org/cl/165068
 2009-12-07 11:31:56 -08:00
Rob Pike
4c0e51cd43 Make printing faster by avoiding mallocs and some other advances. 
Roughly 33% faster for simple cases, probably more for complex ones.

Before:

mallocs per Sprintf(""): 4
mallocs per Sprintf("xxx"): 6
mallocs per Sprintf("%x"): 10
mallocs per Sprintf("%x %x"): 12

Now:

mallocs per Sprintf(""): 2
mallocs per Sprintf("xxx"): 3
mallocs per Sprintf("%x"): 5
mallocs per Sprintf("%x %x"): 7

Speed improves because of avoiding mallocs and also by sharing a bytes.Buffer
between print.go and format.go rather than copying the data back after each
printed item.

Before:

fmt_test.BenchmarkSprintfEmpty	1000000	      1346 ns/op
fmt_test.BenchmarkSprintfString	500000	      3461 ns/op
fmt_test.BenchmarkSprintfInt	500000	      3671 ns/op

Now:

fmt_test.BenchmarkSprintfEmpty	 2000000	       995 ns/op
fmt_test.BenchmarkSprintfString	 1000000	      2745 ns/op
fmt_test.BenchmarkSprintfInt	 1000000	      2391 ns/op
fmt_test.BenchmarkSprintfIntInt	  500000	      3751 ns/op

I believe there is more to get but this is a good milestone.

R=rsc
CC=golang-dev, hong
https://golang.org/cl/166076
 2009-12-06 12:03:52 -08:00
Russ Cox
d6b3f37e1e bytes: asm for bytes.IndexByte 
PERFORMANCE DIFFERENCE

SUMMARY

                                                   amd64           386
2.2 GHz AMD Opteron 8214 HE (Linux)             3.0x faster    8.2x faster
3.60 GHz Intel Xeon (Linux)                     2.2x faster    6.2x faster
2.53 GHz Intel Core2 Duo E7200 (Linux)          1.5x faster    4.4x faster
2.66 Ghz Intel Xeon 5150 (Mac Pro, OS X)        1.5x SLOWER    3.0x faster
2.33 GHz Intel Xeon E5435 (Linux)               1.5x SLOWER    3.0x faster
2.33 GHz Intel Core2 T7600 (MacBook Pro, OS X)  1.4x SLOWER    3.0x faster
1.83 GHz Intel Core2 T5600 (Mac Mini, OS X)        none*       3.0x faster

* but yesterday I consistently saw 1.4x SLOWER.

DETAILS

2.2 GHz AMD Opteron 8214 HE (Linux)

amd64 (3x faster)

IndexByte4K            500000           3733 ns/op     1097.24 MB/s
IndexByte4M               500        4328042 ns/op      969.10 MB/s
IndexByte64M               50       67866160 ns/op      988.84 MB/s

IndexBytePortable4K    200000          11161 ns/op      366.99 MB/s
IndexBytePortable4M       100       11795880 ns/op      355.57 MB/s
IndexBytePortable64M       10      188675000 ns/op      355.68 MB/s

386 (8.2x faster)

IndexByte4K            500000           3734 ns/op     1096.95 MB/s
IndexByte4M               500        4209954 ns/op      996.28 MB/s
IndexByte64M               50       68031980 ns/op      986.43 MB/s

IndexBytePortable4K     50000          30670 ns/op      133.55 MB/s
IndexBytePortable4M        50       31868220 ns/op      131.61 MB/s
IndexBytePortable64M        2      508851500 ns/op      131.88 MB/s

3.60 GHz Intel Xeon (Linux)

amd64 (2.2x faster)

IndexByte4K            500000           4612 ns/op      888.12 MB/s
IndexByte4M               500        4835250 ns/op      867.44 MB/s
IndexByte64M               20       77388450 ns/op      867.17 MB/s

IndexBytePortable4K    200000          10306 ns/op      397.44 MB/s
IndexBytePortable4M       100       11201460 ns/op      374.44 MB/s
IndexBytePortable64M       10      179456800 ns/op      373.96 MB/s

386 (6.3x faster)

IndexByte4K            500000           4631 ns/op      884.47 MB/s
IndexByte4M               500        4846388 ns/op      865.45 MB/s
IndexByte64M               20       78691200 ns/op      852.81 MB/s

IndexBytePortable4K    100000          28989 ns/op      141.29 MB/s
IndexBytePortable4M        50       31183180 ns/op      134.51 MB/s
IndexBytePortable64M        5      498347200 ns/op      134.66 MB/s

2.53 GHz Intel Core2 Duo E7200  (Linux)

amd64 (1.5x faster)

IndexByte4K            500000           6502 ns/op      629.96 MB/s
IndexByte4M               500        6692208 ns/op      626.74 MB/s
IndexByte64M               10      107410400 ns/op      624.79 MB/s

IndexBytePortable4K    200000           9721 ns/op      421.36 MB/s
IndexBytePortable4M       100       10013680 ns/op      418.86 MB/s
IndexBytePortable64M       10      160460800 ns/op      418.23 MB/s

386 (4.4x faster)

IndexByte4K            500000           6505 ns/op      629.67 MB/s
IndexByte4M               500        6694078 ns/op      626.57 MB/s
IndexByte64M               10      107397600 ns/op      624.86 MB/s

IndexBytePortable4K    100000          28835 ns/op      142.05 MB/s
IndexBytePortable4M        50       29562680 ns/op      141.88 MB/s
IndexBytePortable64M        5      473221400 ns/op      141.81 MB/s

2.66 Ghz Intel Xeon 5150  (Mac Pro, OS X)

amd64 (1.5x SLOWER)

IndexByte4K            200000           9290 ns/op      440.90 MB/s
IndexByte4M               200        9568925 ns/op      438.33 MB/s
IndexByte64M               10      154473600 ns/op      434.44 MB/s

IndexBytePortable4K    500000           6202 ns/op      660.43 MB/s
IndexBytePortable4M       500        6583614 ns/op      637.08 MB/s
IndexBytePortable64M       20      107166250 ns/op      626.21 MB/s

386 (3x faster)

IndexByte4K            200000           9301 ns/op      440.38 MB/s
IndexByte4M               200        9568025 ns/op      438.37 MB/s
IndexByte64M               10      154391000 ns/op      434.67 MB/s

IndexBytePortable4K    100000          27526 ns/op      148.80 MB/s
IndexBytePortable4M       100       28302490 ns/op      148.20 MB/s
IndexBytePortable64M        5      454170200 ns/op      147.76 MB/s

2.33 GHz Intel Xeon E5435  (Linux)

amd64 (1.5x SLOWER)

IndexByte4K            200000          10601 ns/op      386.38 MB/s
IndexByte4M               100       10827240 ns/op      387.38 MB/s
IndexByte64M               10      173175500 ns/op      387.52 MB/s

IndexBytePortable4K    500000           7082 ns/op      578.37 MB/s
IndexBytePortable4M       500        7391792 ns/op      567.43 MB/s
IndexBytePortable64M       20      122618550 ns/op      547.30 MB/s

386 (3x faster)

IndexByte4K            200000          11074 ns/op      369.88 MB/s
IndexByte4M               100       10902620 ns/op      384.71 MB/s
IndexByte64M               10      181292800 ns/op      370.17 MB/s

IndexBytePortable4K     50000          31725 ns/op      129.11 MB/s
IndexBytePortable4M        50       32564880 ns/op      128.80 MB/s
IndexBytePortable64M        2      545926000 ns/op      122.93 MB/s

2.33 GHz Intel Core2 T7600 (MacBook Pro, OS X)

amd64 (1.4x SLOWER)

IndexByte4K            200000          11120 ns/op      368.35 MB/s
IndexByte4M               100       11531950 ns/op      363.71 MB/s
IndexByte64M               10      184819000 ns/op      363.11 MB/s

IndexBytePortable4K    500000           7419 ns/op      552.10 MB/s
IndexBytePortable4M       200        8018710 ns/op      523.06 MB/s
IndexBytePortable64M       10      127614900 ns/op      525.87 MB/s

386 (3x faster)

IndexByte4K            200000          11114 ns/op      368.54 MB/s
IndexByte4M               100       11443530 ns/op      366.52 MB/s
IndexByte64M               10      185212000 ns/op      362.34 MB/s

IndexBytePortable4K     50000          32891 ns/op      124.53 MB/s
IndexBytePortable4M        50       33930580 ns/op      123.61 MB/s
IndexBytePortable64M        2      545400500 ns/op      123.05 MB/s

1.83 GHz Intel Core2 T5600  (Mac Mini, OS X)

amd64 (no difference)

IndexByte4K            200000          13497 ns/op      303.47 MB/s
IndexByte4M               100       13890650 ns/op      301.95 MB/s
IndexByte64M                5      222358000 ns/op      301.81 MB/s

IndexBytePortable4K    200000          13584 ns/op      301.53 MB/s
IndexBytePortable4M       100       13913280 ns/op      301.46 MB/s
IndexBytePortable64M       10      222572600 ns/op      301.51 MB/s

386 (3x faster)

IndexByte4K            200000          13565 ns/op      301.95 MB/s
IndexByte4M               100       13882640 ns/op      302.13 MB/s
IndexByte64M                5      221411600 ns/op      303.10 MB/s

IndexBytePortable4K     50000          39978 ns/op      102.46 MB/s
IndexBytePortable4M        50       41038160 ns/op      102.20 MB/s
IndexBytePortable64M        2      656362500 ns/op      102.24 MB/s

R=r
CC=golang-dev
https://golang.org/cl/166055
 2009-12-04 10:23:43 -08:00
Rob Pike
4ed57173b4 avoid an allocation inside bytes.Buffer by providing a static array. 
R=rsc
https://golang.org/cl/165058
 2009-12-04 00:26:08 -08:00
Rob Pike
bc3e34759c Add ReadFrom and WriteTo methods to bytes.Buffer, to enable i/o without buffer allocation. 
Use them in Copy and Copyn.
Speed up ReadFile by using ReadFrom and avoiding Copy altogether (a minor win).

R=rsc, gri
CC=golang-dev
https://golang.org/cl/166041
 2009-12-03 12:56:16 -08:00
Peter Froehlich
1eba218e44 Runes: turn string into []int 
Split: fixed typo in documentation

R=rsc, r, r1
https://golang.org/cl/157170
 2009-12-02 20:47:38 -08:00
Sergio Luis O. B. Correia
6fc820729e go: makes it build for the case $GOROOT has whitespaces 
the bash scripts and makefiles for building go didn't take into account
the fact $GOROOT / $GOBIN could both be directories containing whitespaces,
and was not possible to build it in such a situation.

this commit adjusts the various makefiles/scripts to make it aware of that
possibility, and now it builds successfully when using a path with whitespaces
as well.

Fixes #115.

R=rsc, dsymonds1
https://golang.org/cl/157067
 2009-11-23 17:32:51 -08:00
Russ Cox
9ac4449cb2 gofmt -r 'α[β:len(α)] -> α[β:]' -w src/cmd src/pkg 
R=r, gri
CC=golang-dev
https://golang.org/cl/156115
 2009-11-20 11:45:05 -08:00
Rob Pike
8c1a627e5c add bytes.IndexByte; common case we can make fast later. 
also pick off the special case in strings.Index.   don't want strings.IndexByte
because the call site will very rarely need to allocate and we can handle the
test in the code itself.   bytes.IndexByte can avoid a common allocation.

R=rsc
CC=golang-dev
https://golang.org/cl/156091
 2009-11-18 19:23:08 -08:00
Rob Pike
e70cedfaec remove bytes.Copy 
replace all calls with calls to copy
use copy in regexp and bytes.Buffer

R=rsc
CC=golang-dev
https://golang.org/cl/157073
 2009-11-18 15:24:24 -08:00
David G. Andersen
37f71e8ad6 An asked-for-in #go-nuts extension to quickly create a repeated 
copy of a string or a byte array.
        strings.Repeat("-", 50)
	bytes.Repeat(b, 99)

R=rsc
https://golang.org/cl/155063
 2009-11-16 12:40:01 -08:00
Rob Pike
27779dd6cb fix bug in bytes.Map and add test cases for Map in both strings and bytes packages. 
thanks to ulrik.sverdrup for the test case.

Fixes #191.

R=rsc
CC=golang-dev
https://golang.org/cl/155056
 2009-11-15 12:07:27 -08:00
Robert Griesemer
b27f05f63b minor adjustments to package comments for better synopsis. 
R=rsc
CC=r
http://go/go-review/1026038
 2009-11-10 10:55:53 -08:00
Robert Griesemer
1698934194 - replaced gofmt expression formatting algorithm with 
rsc's algorithm
- applied gofmt -w misc src
- partial CL (remaining files in other CLs)

R=rsc, r
http://go/go-review/1024040
 2009-11-09 21:09:34 -08:00
Robert Griesemer
40621d5c0d remove semis after statements in one-statement statement lists 
R=rsc, r
http://go/go-review/1025029
 2009-11-09 12:07:39 -08:00
Robert Griesemer
368f8cbc75 - fine-tuning of one-line func heuristic (nodes.go) 
- enabled for function declarations (not just function literals)
- applied gofmt -w $GOROOT/src
(look for instance at src/pkg/debug/elf/elf.go)

R=r, rsc
CC=go-dev
http://go/go-review/1026006
 2009-11-06 14:24:38 -08:00
Robert Griesemer
688a6ff71d gofmt-ify bytes 
R=r
http://go/go-review/1016044
 2009-11-04 16:49:28 -08:00
Russ Cox
5d436b9def bytes.SplitAfter and strings.SplitAfter 
most common usage is:

	lines := strings.SplitAfter(text, "\n", 0)

R=r
http://go/go-review/1018042
 2009-11-04 15:19:30 -08:00