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Commit Graph

29 Commits

Author SHA1 Message Date
Quentin Smith
7c46f03498 strconv: strip \r in raw strings passed to Unquote
To match the language spec, strconv.Unquote needs to strip carriage
returns from the raw string.

Also fixes TestUnquote to not be a noop.

Fixes #15997

Change-Id: I2456f50f2ad3830f37e545f4f6774ced9fe609d7
Reviewed-on: https://go-review.googlesource.com/31210
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-10-17 18:34:02 +00:00
Alberto Donizetti
cbf28ff87c strconv: make FormatFloat slowpath a little faster
The relevant benchmark (on an Intel i7-4510U machine):

name                      old time/op  new time/op  delta
FormatFloat/Slowpath64-4  68.6µs ± 0%  44.1µs ± 2%  -35.71%  (p=0.000 n=13+15)

Change-Id: I67eb0e81ce74ed57752d0280059f91419f09e93b
Reviewed-on: https://go-review.googlesource.com/30099
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-10-17 18:23:32 +00:00
Joe Tsai
3a67d595f5 strconv: fix function name in errors for Atoi
Fixes #16980

Change-Id: I902a02b157c2c7d1772f5122b850dc48b1d7a224
Reviewed-on: https://go-review.googlesource.com/28474
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-09-04 00:17:58 +00:00
Justyn Temme
b0838ca292 strconv: clarify doc for Atoi return type
Change-Id: I47bd98509663d75b0d4dedbdb778e803d90053cf
Reviewed-on: https://go-review.googlesource.com/24216
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-06-28 18:16:25 +00:00
Marcel van Lohuizen
a2a4db7375 unicode: upgrade to version 9.0.0
Changes beyond generated tables:
- Now supports aliases to handle deprecated
  property classes.
- Some Mongolian letters are now modifiers.

Other changes:
- strconv: newly generated table to be in sync
- regexp/syntax: updated maxFold

Fixes #16191

Change-Id: I56bdf21ee2f775f2a82d0465b3772faf5c24cb61
Reviewed-on: https://go-review.googlesource.com/24496
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-06-28 15:08:11 +00:00
Marcel van Lohuizen
0f5697a81d strconv: use Run for some benchmarks
This serves as an example of table-driven benchmarks which are analoguous to the common pattern for table-driven tests.

Change-Id: I47f94c121a7117dd1e4ba03b3f2f8bcb5da38063
Reviewed-on: https://go-review.googlesource.com/23470
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-06-02 20:47:29 +00:00
Robert Griesemer
5e74d40952 strconv: fix ParseFloat for special forms of zero values
Fixes #15364.

Change-Id: Id2a349896064c7c9e00e36c55162068bf18162b2
Reviewed-on: https://go-review.googlesource.com/22272
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-04-19 22:39:43 +00:00
Matthew Dempsky
0da4dbe232 all: remove unnecessary type conversions
cmd and runtime were handled separately, and I'm intentionally skipped
syscall. This is the rest of the standard library.

CL generated mechanically with github.com/mdempsky/unconvert.

Change-Id: I9e0eff886974dedc37adb93f602064b83e469122
Reviewed-on: https://go-review.googlesource.com/22104
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-15 07:31:45 +00:00
Brad Fitzpatrick
5fea2ccc77 all: single space after period.
The tree's pretty inconsistent about single space vs double space
after a period in documentation. Make it consistently a single space,
per earlier decisions. This means contributors won't be confused by
misleading precedence.

This CL doesn't use go/doc to parse. It only addresses // comments.
It was generated with:

$ perl -i -npe 's,^(\s*// .+[a-z]\.)  +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.)  +([A-Z])')
$ go test go/doc -update

Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7
Reviewed-on: https://go-review.googlesource.com/20022
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dave Day <djd@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-02 00:13:47 +00:00
Brad Fitzpatrick
519474451a all: make copyright headers consistent with one space after period
This is a subset of https://golang.org/cl/20022 with only the copyright
header lines, so the next CL will be smaller and more reviewable.

Go policy has been single space after periods in comments for some time.

The copyright header template at:

    https://golang.org/doc/contribute.html#copyright

also uses a single space.

Make them all consistent.

Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0
Reviewed-on: https://go-review.googlesource.com/20111
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-01 23:34:33 +00:00
Brad Fitzpatrick
351c15f1ce all: remove public named return values when useless
Named returned values should only be used on public funcs and methods
when it contributes to the documentation.

Named return values should not be used if they're only saving the
programmer a few lines of code inside the body of the function,
especially if that means there's stutter in the documentation or it
was only there so the programmer could use a naked return
statement. (Naked returns should not be used except in very small
functions)

This change is a manual audit & cleanup of public func signatures.

Signatures were not changed if:

* the func was private (wouldn't be in public godoc)
* the documentation referenced it
* the named return value was an interesting name. (i.e. it wasn't
  simply stutter, repeating the name of the type)

There should be no changes in behavior. (At least: none intended)

Change-Id: I3472ef49619678fe786e5e0994bdf2d9de76d109
Reviewed-on: https://go-review.googlesource.com/20024
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
2016-02-29 03:31:19 +00:00
Justin Nuß
9d73a6dcad strconv: Avoid allocation in AppendQuote*
The current implementations of the AppendQuote functions use quoteWith
(through Quote) for quoting the given value and appends the returned
string to the dst byte slice. quoteWith internally creates a byte slice
on each call which gets converted to a string in Quote.

This means the AppendQuote functions always allocates a new byte slice
and a string only to append them to an existing byte slice. In the case
of (Append)QuoteRune the string passed to quoteWith will also needs to
be allocated from a rune first.

Split quoteWith into two functions (quoteWith and appendQuotedWith) and
replace the call to Quote inside AppendQuote with appendQuotedWith,
which appends directly to the byte slice passed to AppendQuote and also
avoids the []byte->string conversion.

Also introduce the 2 functions quoteRuneWith and appendQuotedRuneWith
that work the same way as quoteWith and appendQuotedWith, but take a
single rune instead of a string, to avoid allocating a new string when
appending a single rune, and use them in (Append)QuoteRune.

Also update the ToASCII and ToGraphic variants to use the new functions.

Benchmark results:

benchmark                      old ns/op     new ns/op     delta
BenchmarkQuote-8               428           503           +17.52%
BenchmarkQuoteRune-8           148           105           -29.05%
BenchmarkAppendQuote-8         435           307           -29.43%
BenchmarkAppendQuoteRune-8     158           23.5          -85.13%

benchmark                      old allocs     new allocs     delta
BenchmarkQuote-8               3              3              +0.00%
BenchmarkQuoteRune-8           3              2              -33.33%
BenchmarkAppendQuote-8         3              0              -100.00%
BenchmarkAppendQuoteRune-8     3              0              -100.00%

benchmark                      old bytes     new bytes     delta
BenchmarkQuote-8               144           144           +0.00%
BenchmarkQuoteRune-8           16            16            +0.00%
BenchmarkAppendQuote-8         144           0             -100.00%
BenchmarkAppendQuoteRune-8     16            0             -100.00%

Change-Id: I77c148d5c7242f1b0edbbeeea184878abb51a522
Reviewed-on: https://go-review.googlesource.com/18962
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 17:15:01 +00:00
Robert Griesemer
0befa47ae8 strconv: slightly simplified roundShortest; better comments
Change-Id: If886f15468680f7e1c589873066b4391eb9784b5
Reviewed-on: https://go-review.googlesource.com/14856
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-09-23 21:14:29 +00:00
Robert Griesemer
63ee321059 strconv: fix comment
Fixes #12531.

Change-Id: I66dc7ac1b71b8f72b4a8f3ec18befa2607ef358b
Reviewed-on: https://go-review.googlesource.com/14494
Reviewed-by: Rob Pike <r@golang.org>
2015-09-10 21:31:07 +00:00
Rob Pike
74288f09dc strconv: add QuoteToGraphic and friends
This version of quoting allows runes in category Zs, such as the
ideographic space characters, to be passed through unquoted.

Still to do (maybe): A way to access this from Printf.

Updates #11511.

Change-Id: I3bae84b1aa0bc1b885318d3f67c5f451099a2a5a
Reviewed-on: https://go-review.googlesource.com/14184
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
2015-09-08 17:33:17 +00:00
Carlos C
1c89007669 strconv: add examples to package
Change-Id: I69a2b6a99a53c875162be8a7d86455559cd74504
Reviewed-on: https://go-review.googlesource.com/11371
Reviewed-by: Russ Cox <rsc@golang.org>
2015-07-22 16:00:21 +00:00
Marcel van Lohuizen
fe15da62f7 unicode: upgrade to 8.0.0
Not sure if I'm on time for 1.5; Unicode 8 just got released.

Straighforward upgrade. Only changed maketables.go to prevent it from adding
the Cherokee upper and lower case mappings. This change causes the caseOrbit
table to NOT change. Added tests to verify that the relevant functions still
produce the correct result, even for Cherokee.

Fixes #11309

Change-Id: I42850f5b3399bde125b002efc78eff96dbd86a08
Reviewed-on: https://go-review.googlesource.com/11286
Reviewed-by: Russ Cox <rsc@golang.org>
2015-06-26 18:01:29 +00:00
Robert Griesemer
acd82d5017 strconv: minor internal comment fix
Change-Id: I590ac9e976d4044d1f4f280137ea9b38851a9fc2
Reviewed-on: https://go-review.googlesource.com/10424
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-05-27 22:02:02 +00:00
Robert Griesemer
faa9d1eca9 strconv: use 64bit uint for decimal conversion if available
The existing code used ints for the (slow) decimal conversion and
assumed that they were 32bit wide.

This change uses uints and the appropriate width (32 or 64bit)
depending on platform.

The performance difference is in the noise for the usual (optimized)
case which does not use the slow path conversion:

benchmark                               old ns/op     new ns/op     delta
BenchmarkFormatFloatDecimal             298           299           +0.34%
BenchmarkFormatFloat                    388           392           +1.03%
BenchmarkFormatFloatExp                 365           364           -0.27%
BenchmarkFormatFloatNegExp              364           362           -0.55%
BenchmarkFormatFloatBig                 482           476           -1.24%
BenchmarkAppendFloatDecimal             100           102           +2.00%
BenchmarkAppendFloat                    199           201           +1.01%
BenchmarkAppendFloatExp                 174           175           +0.57%
BenchmarkAppendFloatNegExp              169           174           +2.96%
BenchmarkAppendFloatBig                 286           286           +0.00%
BenchmarkAppendFloat32Integer           99.9          102           +2.10%
BenchmarkAppendFloat32ExactFraction     161           164           +1.86%
BenchmarkAppendFloat32Point             199           201           +1.01%
BenchmarkAppendFloat32Exp               167           168           +0.60%
BenchmarkAppendFloat32NegExp            163           169           +3.68%
BenchmarkAppendFloat64Fixed1            137           134           -2.19%
BenchmarkAppendFloat64Fixed2            144           146           +1.39%
BenchmarkAppendFloat64Fixed3            138           140           +1.45%
BenchmarkAppendFloat64Fixed4            144           145           +0.69%

The performance difference is significant if the fast path conversion is
explicitly turned off (ftoa.go:101):

benchmark                               old ns/op     new ns/op     delta
BenchmarkFormatFloatDecimal             459           427           -6.97%
BenchmarkFormatFloat                    1560          1180          -24.36%
BenchmarkFormatFloatExp                 5501          3128          -43.14%
BenchmarkFormatFloatNegExp              24085         14360         -40.38%
BenchmarkFormatFloatBig                 1409          1081          -23.28%
BenchmarkAppendFloatDecimal             248           226           -8.87%
BenchmarkAppendFloat                    1315          982           -25.32%
BenchmarkAppendFloatExp                 5274          2869          -45.60%
BenchmarkAppendFloatNegExp              23905         14054         -41.21%
BenchmarkAppendFloatBig                 1194          860           -27.97%
BenchmarkAppendFloat32Integer           167           175           +4.79%
BenchmarkAppendFloat32ExactFraction     182           184           +1.10%
BenchmarkAppendFloat32Point             556           564           +1.44%
BenchmarkAppendFloat32Exp               1134          918           -19.05%
BenchmarkAppendFloat32NegExp            2679          1801          -32.77%
BenchmarkAppendFloat64Fixed1            274           238           -13.14%
BenchmarkAppendFloat64Fixed2            494           368           -25.51%
BenchmarkAppendFloat64Fixed3            1833          1008          -45.01%
BenchmarkAppendFloat64Fixed4            6133          3596          -41.37%

Change-Id: I829b8abcca882b1c10d8ae421d3249597c31f3c9
Reviewed-on: https://go-review.googlesource.com/3811
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-10 17:42:20 +00:00
Josh Bleecher Snyder
2adc4e8927 all: use "reports whether" in place of "returns true if(f)"
Comment changes only.

Change-Id: I56848814564c4aa0988b451df18bebdfc88d6d94
Reviewed-on: https://go-review.googlesource.com/7721
Reviewed-by: Rob Pike <r@golang.org>
2015-03-18 15:14:06 +00:00
Martin Möhrmann
d5b5d6702a strconv: simplify code for binary exponent float format
Use optimized formatBits function to format mantissa and exponent.
Add benchmark for binary exponent float format.

on darwin/386

benchmark                         old ns/op     new ns/op     delta
BenchmarkAppendFloatBinaryExp     520           122           -76.54%

on darwin/amd64

benchmark                         old ns/op     new ns/op     delta
BenchmarkAppendFloatBinaryExp     76.9          84.3          +9.62%

Change-Id: If543552f1960e1655bed3a4130914e5eaa3aac69
Reviewed-on: https://go-review.googlesource.com/5600
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-03-05 16:52:41 +00:00
Robert Griesemer
81a3f291f0 strconv: simplified logic resulting in faster float formatting
benchmark                               old ns/op     new ns/op     delta
BenchmarkFormatFloatDecimal             300           283           -5.67%
BenchmarkFormatFloat                    383           381           -0.52%
BenchmarkFormatFloatExp                 359           357           -0.56%
BenchmarkFormatFloatNegExp              357           358           +0.28%
BenchmarkFormatFloatBig                 468           430           -8.12%
BenchmarkAppendFloatDecimal             104           92.5          -11.06%
BenchmarkAppendFloat                    199           190           -4.52%
BenchmarkAppendFloatExp                 172           167           -2.91%
BenchmarkAppendFloatNegExp              172           169           -1.74%
BenchmarkAppendFloatBig                 280           235           -16.07%
BenchmarkAppendFloat32Integer           104           92.4          -11.15%
BenchmarkAppendFloat32ExactFraction     168           171           +1.79%
BenchmarkAppendFloat32Point             206           199           -3.40%
BenchmarkAppendFloat32Exp               167           167           +0.00%
BenchmarkAppendFloat32NegExp            167           166           -0.60%
BenchmarkAppendFloat64Fixed1            134           129           -3.73%
BenchmarkAppendFloat64Fixed2            144           136           -5.56%
BenchmarkAppendFloat64Fixed3            138           134           -2.90%
BenchmarkAppendFloat64Fixed4            145           138           -4.83%

Change-Id: Ia143840cb34cbd1cebd6b691dd0a45b7264b406c
Reviewed-on: https://go-review.googlesource.com/3920
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-02-11 17:45:19 +00:00
Robert Griesemer
9209d893c8 strconv: fix internal documentation (clarification, typos)
Change-Id: I7514e643a6a81ca715adbf6f8d19d3b2dd43fe6c
Reviewed-on: https://go-review.googlesource.com/3810
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-02-05 22:36:19 +00:00
Martin Möhrmann
06ed8f0df7 strconv: speed up atoi for common cases
Add compile time constants for bases 10 and 16 instead of computing the cutoff
value on every invocation of ParseUint by a division.

Reduce usage of slice operations.

amd64:
benchmark              old ns/op     new ns/op     delta
BenchmarkAtoi          44.6          36.0          -19.28%
BenchmarkAtoiNeg       44.2          38.9          -11.99%
BenchmarkAtoi64        72.5          56.7          -21.79%
BenchmarkAtoi64Neg     66.1          58.6          -11.35%

386:
benchmark              old ns/op     new ns/op     delta
BenchmarkAtoi          86.6          73.0          -15.70%
BenchmarkAtoiNeg       86.6          72.3          -16.51%
BenchmarkAtoi64        126           108           -14.29%
BenchmarkAtoi64Neg     126           108           -14.29%

Change-Id: I0a271132120d776c97bb4ed1099793c73e159893
Reviewed-on: https://go-review.googlesource.com/2460
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-01-08 20:58:26 +00:00
Martin Möhrmann
878fa886a6 strconv: add atoi tests for uncommon bases and syntax errors
Edge cases like base 2 and 36 conversions are now covered.
Many tests are mirrored from the itoa tests.

Added more test cases for syntax errors.

Change-Id: Iad8b2fb4854f898c2bfa18cdeb0cb4a758fcfc2e
Reviewed-on: https://go-review.googlesource.com/2463
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-01-08 16:51:47 +00:00
Martin Möhrmann
241583a432 strconv: optimize decimal to string conversion
Avoid the decimal lookup in digits array and compute the decimal character value directly.
Reduce calls to 64bit division on 32bit plattforms by splitting conversion into smaller blocks.
Convert value to uintptr type when it can be represented by uintptr.

on darwin/386

benchmark               old ns/op     new ns/op     delta
BenchmarkFormatInt      8352          7466          -10.61%
BenchmarkAppendInt      4281          3401          -20.56%
BenchmarkFormatUint     2785          2251          -19.17%
BenchmarkAppendUint     1770          1223          -30.90%

on darwin/amd64

benchmark               old ns/op     new ns/op     delta
BenchmarkFormatInt      5531          5492          -0.71%
BenchmarkAppendInt      2435          2295          -5.75%
BenchmarkFormatUint     1628          1569          -3.62%
BenchmarkAppendUint     726           750           +3.31%

Change-Id: Ifca281cbdd62ab7d7bd4b077a96da99eb12cf209
Reviewed-on: https://go-review.googlesource.com/2105
Reviewed-by: Robert Griesemer <gri@golang.org>
2014-12-30 23:28:02 +00:00
Martin Möhrmann
0668b595b6 strconv/itoa: add test to generate the longest output string possible by formatBits
The new test case produces the longest string representation possible and thereby uses
all of the 65 bytes in the buffer array used by the formatBits function.

Change-Id: I11320c4de56ced5ff098b7e37f1be08e456573e2
Reviewed-on: https://go-review.googlesource.com/2108
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2014-12-27 22:35:08 +00:00
Rob Pike
b6571a0713 strconv: fix documentation for CanBackquote.
Space is not a control character.

Fixes #8571.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/137380043
2014-09-09 11:45:36 -07:00
Russ Cox
c007ce824d build: move package sources from src/pkg to src
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
2014-09-08 00:08:51 -04:00