If a previous Write returned an error, any subsequent Write or ReadFrom
must return that error before any operations.
However, only Write behaved correctly and this change fixes that problem
by making sure that ReadFrom firstly checks for the underlying error.
Fixes#35194
Change-Id: I31356a9e8bd945bc0168b2e3be470f3ae69d4813
Reviewed-on: https://go-review.googlesource.com/c/go/+/204000
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
If reading 0 bytes, don't return the error from the underlying
io.Reader if there is still data buffered.
Fixes#32693
Change-Id: I12a97bd6003c638c15d41028942f27edf88340e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/182997
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Since Reader.Peek potentially reads from the underlying io.Reader,
discarding previous buffers, UnreadRune and UnreadByte cannot
necessarily work. Change Peek to invalidate the unread buffers in all
cases (as allowed according to the documentation) and thus prevent
hiding bugs in the caller.
(This change was previoiusly merged and then reverted due concern about
being too close to a release)
Fixes#18556
Change-Id: I9027d75aa834d4b27703f37711ba25de04d89f3c
GitHub-Last-Rev: 917ef1e511
GitHub-Pull-Request: golang/go#28768
Reviewed-on: https://go-review.googlesource.com/c/149297
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
CL 145577 added the part about io.ReadFull to read len(p)
but it should be next to the existing sentence about not
reading len(p) bytes.
Change-Id: Idfa037c59a3085d44d5da6129188473db0e96d23
Reviewed-on: https://go-review.googlesource.com/c/148903
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
Many times when using bufio.Reader I imagine, incorrectly, that it
implements the retry loop itself, being a high-level buffered wrapper
around, say, a file descriptor prone to short reads. This comment
would have saved me much time.
Change-Id: I34c790e0d7c1515430a76d02ce4739b586a36ba7
Reviewed-on: https://go-review.googlesource.com/c/145577
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
When existing data in buffer does not have delimiter,
and new data is added with b.fill(), continue search from
previous point instead of starting from beginning.
Change-Id: Id78332afe2b0281b4a3c86bd1ffe9449cfea7848
GitHub-Last-Rev: 08e7d2f501
GitHub-Pull-Request: golang/go#25441
Reviewed-on: https://go-review.googlesource.com/113535
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
All the readers are denoted as `b` while for `Reader.Size()` it is `r`.
Change-Id: Ib6f97306c11b3abb2ff30edbc9f9362cad36d080
GitHub-Last-Rev: 992f88b374
GitHub-Pull-Request: golang/go#26205
Reviewed-on: https://go-review.googlesource.com/122156
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
In general use of these magic methods must be documented so that
users understand what will happen.
Fixes#23289
Change-Id: Ic46915eee1d3b7e57d8d1886834ddfb2e8e66e62
Reviewed-on: https://go-review.googlesource.com/103238
Reviewed-by: Rob Pike <r@golang.org>
Go 1.9 beta 2 is already out.
It's too late to break code with a change like this.
This can be rolled forward for Go 1.10.
This reverts commit ae238688d2.
Change-Id: Ib67b8629e3deac5d50d76581aba6a91ca7a7853e
Reviewed-on: https://go-review.googlesource.com/47570
Reviewed-by: Russ Cox <rsc@golang.org>
Since Reader.Peek potentially reads from the underlying io.Reader,
discarding previous buffers, UnreadRune and UnreadByte cannot
necessarily work. Change Peek to invalidate the unread buffers in all
cases (as allowed according to the documentation) and thus prevent
hiding bugs in the caller.
Fixes#18556
Change-Id: I8d836db7ce31c4aaecb4f61c24573b0332bbf30d
Reviewed-on: https://go-review.googlesource.com/46850
Reviewed-by: Robert Griesemer <gri@golang.org>
Done with grep & interactive search & replace, to double-check
replacements. Not many remained after CL 20022.
Fixes#18572
Change-Id: Idbe90ba3b584f9b9661d2bbd141607daaadfa41a
Reviewed-on: https://go-review.googlesource.com/45270
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
The existing implementation returns nil, ErrBufferFull when n > len(b.buf),
now it will return any data in the buffer and ErrBufferFull.
Fixes#14121
Change-Id: Ie52d32ccd80e4078ebfae6e75393c89675959ead
Reviewed-on: https://go-review.googlesource.com/19091
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
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>
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>
Or at least make them true.
Fixes#12237.
Change-Id: I3c92a07233b2174c5731d6fa7fbb9ca3a97beb6b
Reviewed-on: https://go-review.googlesource.com/17237
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The default value for error is nil so there is no need to assign this
value here.
Change-Id: I4714ef7607996ccbf91b704390e1d1d39ee3847b
Reviewed-on: https://go-review.googlesource.com/12355
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reader.Discard is the complement to Peek. It discards the next n bytes
of input.
We already have Reader.Buffered to see how many bytes of data are
sitting available in memory, and Reader.Peek to get that that buffer
directly. But once you're done with the Peek'd data, you can't get rid
of it, other than Reading it.
Both Read and io.CopyN(ioutil.Discard, bufReader, N) are relatively
slow. People instead resort to multiple blind ReadByte calls, just to
advance the internal b.r variable.
I've wanted this previously, several people have asked for it in the
past on golang-nuts/dev, and somebody just asked me for it again in a
private email. There are a few places in the standard library we'd use
it too.
Change-Id: I85dfad47704a58bd42f6867adbc9e4e1792bc3b0
Reviewed-on: https://go-review.googlesource.com/2260
Reviewed-by: Russ Cox <rsc@golang.org>
lihaowei
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Cuong Manh Le
Alex Gaynor
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Brad Fitzpatrick
Martin Garton
Russ Cox
Alan Donovan
andrius4669
nogoegst
Ian Lance Taylor
Sam Whited
Matt Layher
Martin Möhrmann
djherbis
Silvan Jegen