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weekly.2011-07-19

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R=golang-dev, nigeltao, dsymonds, r
CC=golang-dev
https://golang.org/cl/4801042
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Andrew Gerrand 2011-07-20 15:45:55 +10:00
parent 48d1240e51
commit 50ddb98b24
2 changed files with 117 additions and 1 deletions
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@ -70,6 +70,5 @@ dac76f0b1a18a5de5b54a1dc0b231aceaf1c8583 weekly.2011-06-16
541c445d6c1353fbfa39df7dc4b0eb27558d1fc1 weekly.2011-06-23
1b38d90eebcddefabb3901c5bb63c7e2b04a6ec5 release.r58
16bfa562ba767aefd82e598da8b15ee4729e23b0 weekly.2011-07-07
16bfa562ba767aefd82e598da8b15ee4729e23b0 weekly
d292bc7886682d35bb391bf572be28656baee12d release.r58.1
d292bc7886682d35bb391bf572be28656baee12d release

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doc/devel/weekly.html
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@ -14,6 +14,123 @@ hg pull
hg update weekly.<i>YYYY-MM-DD</i>
</pre>
<h2 id="2011-07-19">2011-07-19</h2>
<pre>
This weekly snapshot includes a language change and a change to the image
package that may require changes to client code.
The language change is that an "else" block is now required to have braces
except if the body of the "else" is another "if". Since gofmt always puts those
braces in anyway, programs will not be affected unless they contain "else for",
"else switch", or "else select". Run gofmt to fix any such programs.
The image package has had significant changes made to the Pix field of struct
types such as image.RGBA and image.NRGBA. The image.Image interface type has
not changed, though, and you should not need to change your code if you don't
explicitly refer to Pix fields. For example, if you decode a number of images
using the image/jpeg package, compose them using image/draw, and then encode
the result using image/png, then your code should still work as before.
If you do explicitly refer to Pix fields, there are two changes. First, Pix[0]
now refers to the pixel at Bounds().Min instead of the pixel at (0, 0). Second,
the element type of the Pix slice is now uint8 instead of image.FooColor. For
example, for an image.RGBA, the channel values will be packed R, G, B, A, R, G,
B, A, etc. For 16-bits-per-channel color types, the pixel data will be stored
as big-endian uint8s.
Most Pix field types have changed, and so if your code still compiles after
this change, then you probably don't need to make any further changes (unless
you use an image.Paletted's Pix field). If you do get compiler errors, code
that used to look like this:
// Get the R, G, B, A values for the pixel at (x, y).
var m *image.RGBA = loadAnImage()
c := m.Pix[y*m.Stride + x]
r, g, b, a := c.R, c.G, c.B, c.A
should now look like this:
// Get the R, G, B, A values for the pixel at (x, y).
var m *image.RGBA = loadAnImage()
i := (y-m.Rect.Min.Y)*m.Stride + (x-m.Rect.Min.X)*4
r := m.Pix[i+0]
g := m.Pix[i+1]
b := m.Pix[i+2]
a := m.Pix[i+3]
This image package change will not be fixed by gofix: how best to translate
code into something efficient and idiomatic depends on the surrounding context,
and is not easily automatable. Examples of what to do can be found in the
changes to image/draw/draw.go in http://codereview.appspot.com/4675076/
Other changes:
* 6l: change default output name to 6.out.exe on windows (thanks Alex Brainman).
* archive/zip: add Writer,
add Mtime_ns function to get modified time in sensible format.
* cc, ld, gc: fixes for Plan 9 build (thanks Lucio De Re).
* cgi: close stdout reader pipe when finished.
* cgo: add missing semicolon in generated struct,
windows amd64 port (thanks Wei Guangjing).
* codereview: fix for Mercurial 1.9.
* dashboard: list "most installed this week" with rolling count.
* debug/elf: read ELF Program headers (thanks Matthew Horsnell).
* debug/pe: fixes ImportedSymbols for Win64 (thanks Wei Guangjing).
* debug/proc: remove unused package.
* doc/talks/io2010: update with gofix and handle the errors.
* exp/eval, exp/ogle: remove packages eval and ogle.
* exp/regexp/syntax: add Prog.NumCap.
* exp/template: API changes, bug fixes, and tweaks.
* flag: make -help nicer.
* fmt: Scan(&int) was mishandling a lone digit.
* gc: fix closure bug,
fix to build with clang (thanks Dave Cheney),
make size of struct{} and [0]byte 0 bytes (thanks Robert Hencke),
some enhancements to printing debug info.
* gif: fix local color map and coordinates.
* go/build: fixes for windows (thanks Alex Brainman),
include processing of .c files for cgo packages (thanks Alex Brainman),
less aggressive failure when GOROOT not found.
* go/printer: changed max. number of newlines from 3 to 2.
* gob: register more slice types (thanks Bobby Powers).
* godoc: support for file systems stored in .zip files.
* goinstall, dashboard: Google Code now supports git (thanks Tarmigan Casebolt).
* hash/crc32: add SSE4.2 support.
* html: update section references in comments to the latest HTML5 spec.
* http: drain the pipe output in TestHandlerPanic to avoid logging deadlock,
fix Content-Type of file extension (thanks Yasuhiro Matsumoto),
implement http.FileSystem for zip files,
let FileServer work when path doesn't begin with a slash,
support for periodic flushing in ReverseProxy.
* image/draw: add benchmarks.
* json: add omitempty struct tag option,
allow using '$' and '-' as the struct field's tag (thanks Mikio Hara),
encode \r and \n in strings as e.g. "\n", not "\u000A" (thanks Evan Martin),
escape < and > in any JSON string for XSS prevention.
* ld: allow seek within write buffer<
add a PT_LOAD PHDR entry for the PHDR (thanks David Anderson).
* net: windows/amd64 port (thanks Wei Guangjing).
* os: plan9: add Process.Signal as a way to send notes (thanks Yuval Pavel Zholkover).
* os: don't permit Process.Signal after a successful Wait.
* path/filepath: fixes for windows paths (thanks Alex Brainman).
* reflect: add Value.NumMethod,
panic if Method index is out of range for a type.
* runtime: faster entersyscall, exitsyscall,
fix panic for make(chan [0]byte),
fix subtle select bug (thanks Hector Chu),
make goc2c build on Plan 9 (thanks Lucio De Re),
make TestSideEffectOrder work twice,
several parallelism-related optimizations and fixes,
stdcall_raw stack 16byte align for Win64 (thanks Wei Guangjing),
string-related optimizations (thanks Quan Yong Zhai),
track running goroutine count.
* strconv: handle [-+]Infinity in atof.
* sync: add fast paths to WaitGroup,
improve RWMutex performance.
* syscall: add Flock on Linux,
parse and encode SCM_RIGHTS and SCM_CREDENTIALS (thanks Albert Strasheim).
</pre>
<h2 id="2011-07-07">2011-07-07</h2>
<pre>