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Refactor utf-8 conversion (irc) (#1767)
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Wim
GitHub
parent
663850a2b8
commit
f0f801402d
32
bridge/irc/charset.go
Normal file
32
bridge/irc/charset.go
Normal file
@ -0,0 +1,32 @@
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package birc
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import (
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"golang.org/x/text/encoding"
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"golang.org/x/text/encoding/japanese"
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"golang.org/x/text/encoding/korean"
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"golang.org/x/text/encoding/simplifiedchinese"
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"golang.org/x/text/encoding/traditionalchinese"
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"golang.org/x/text/encoding/unicode"
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)
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var encoders = map[string]encoding.Encoding{
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"utf-8": unicode.UTF8,
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"iso-2022-jp": japanese.ISO2022JP,
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"big5": traditionalchinese.Big5,
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"gbk": simplifiedchinese.GBK,
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"euc-kr": korean.EUCKR,
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"gb2312": simplifiedchinese.HZGB2312,
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"shift-jis": japanese.ShiftJIS,
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"euc-jp": japanese.EUCJP,
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"gb18030": simplifiedchinese.GB18030,
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}
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func toUTF8(from string, input string) string {
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enc, ok := encoders[from]
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if !ok {
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return input
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}
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res, _ := enc.NewDecoder().String(input)
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return res
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}
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@ -11,7 +11,6 @@ import (
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"github.com/42wim/matterbridge/bridge/config"
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"github.com/42wim/matterbridge/bridge/helper"
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"github.com/lrstanley/girc"
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"github.com/missdeer/golib/ic"
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"github.com/paulrosania/go-charset/charset"
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"github.com/saintfish/chardet"
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@ -24,12 +23,12 @@ func (b *Birc) handleCharset(msg *config.Message) error {
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if b.GetString("Charset") != "" {
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switch b.GetString("Charset") {
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case "gbk", "gb18030", "gb2312", "big5", "euc-kr", "euc-jp", "shift-jis", "iso-2022-jp":
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msg.Text = ic.ConvertString("utf-8", b.GetString("Charset"), msg.Text)
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msg.Text = toUTF8(b.GetString("Charset"), msg.Text)
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default:
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buf := new(bytes.Buffer)
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w, err := charset.NewWriter(b.GetString("Charset"), buf)
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if err != nil {
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b.Log.Errorf("charset from utf-8 conversion failed: %s", err)
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b.Log.Errorf("charset to utf-8 conversion failed: %s", err)
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return err
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}
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fmt.Fprint(w, msg.Text)
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@ -227,7 +226,7 @@ func (b *Birc) handlePrivMsg(client *girc.Client, event girc.Event) {
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}
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switch mycharset {
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case "gbk", "gb18030", "gb2312", "big5", "euc-kr", "euc-jp", "shift-jis", "iso-2022-jp":
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rmsg.Text = ic.ConvertString("utf-8", b.GetString("Charset"), rmsg.Text)
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rmsg.Text = toUTF8(b.GetString("Charset"), rmsg.Text)
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default:
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r, err := charset.NewReader(mycharset, strings.NewReader(rmsg.Text))
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if err != nil {
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3
go.mod
3
go.mod
@ -32,7 +32,6 @@ require (
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github.com/mattermost/mattermost-server/v5 v5.39.3
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github.com/mattermost/mattermost-server/v6 v6.4.2
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github.com/mattn/godown v0.0.1
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github.com/missdeer/golib v1.0.4
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github.com/nelsonken/gomf v0.0.0-20180504123937-a9dd2f9deae9
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github.com/paulrosania/go-charset v0.0.0-20190326053356-55c9d7a5834c
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github.com/rs/xid v1.3.0
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@ -49,6 +48,7 @@ require (
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github.com/zfjagann/golang-ring v0.0.0-20210116075443-7c86fdb43134
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golang.org/x/image v0.0.0-20220302094943-723b81ca9867
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golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a
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golang.org/x/text v0.3.7
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gomod.garykim.dev/nc-talk v0.3.0
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gopkg.in/olahol/melody.v1 v1.0.0-20170518105555-d52139073376
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layeh.com/gumble v0.0.0-20200818122324-146f9205029b
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@ -126,7 +126,6 @@ require (
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golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
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golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
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golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
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golang.org/x/text v0.3.7 // indirect
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golang.org/x/time v0.0.0-20201208040808-7e3f01d25324 // indirect
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google.golang.org/appengine v1.6.7 // indirect
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google.golang.org/protobuf v1.27.1 // indirect
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2
go.sum
2
go.sum
@ -1163,8 +1163,6 @@ github.com/minio/minio-go/v7 v7.0.16/go.mod h1:pUV0Pc+hPd1nccgmzQF/EXh48l/Z/yps6
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github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
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github.com/minio/sha256-simd v1.0.0 h1:v1ta+49hkWZyvaKwrQB8elexRqm6Y0aMLjCNsrYxo6g=
|
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github.com/minio/sha256-simd v1.0.0/go.mod h1:OuYzVNI5vcoYIAmbIvHPl3N3jUzVedXbKy5RFepssQM=
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github.com/missdeer/golib v1.0.4 h1:tM7MJIPffXSmwFCTOCMjL5C7JsT5SQ+OmZwzssZQOa8=
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github.com/missdeer/golib v1.0.4/go.mod h1:mPN/UcszFq0GxKfQsZI3aFOiRjnzXCBZ392od3guGEY=
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github.com/mistifyio/go-zfs v2.1.2-0.20190413222219-f784269be439+incompatible/go.mod h1:8AuVvqP/mXw1px98n46wfvcGfQ4ci2FwoAjKYxuo3Z4=
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github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
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github.com/mitchellh/cli v1.1.0/go.mod h1:xcISNoH86gajksDmfB23e/pu+B+GeFRMYmoHXxx3xhI=
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504
vendor/github.com/missdeer/golib/LICENSE
generated
vendored
504
vendor/github.com/missdeer/golib/LICENSE
generated
vendored
@ -1,504 +0,0 @@
|
||||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 2.1, February 1999
|
||||
|
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Copyright (C) 1991, 1999 Free Software Foundation, Inc.
|
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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[This is the first released version of the Lesser GPL. It also counts
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as the successor of the GNU Library Public License, version 2, hence
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the version number 2.1.]
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Preamble
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The licenses for most software are designed to take away your
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freedom to share and change it. By contrast, the GNU General Public
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Licenses are intended to guarantee your freedom to share and change
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free software--to make sure the software is free for all its users.
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This license, the Lesser General Public License, applies to some
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specially designated software packages--typically libraries--of the
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Free Software Foundation and other authors who decide to use it. You
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can use it too, but we suggest you first think carefully about whether
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When we speak of free software, we are referring to freedom of use,
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Finally, software patents pose a constant threat to the existence of
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Most GNU software, including some libraries, is covered by the
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When a program is linked with a library, whether statically or using
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a shared library, the combination of the two is legally speaking a
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combined work, a derivative of the original library. The ordinary
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General Public License therefore permits such linking only if the
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entire combination fits its criteria of freedom. The Lesser General
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Public License permits more lax criteria for linking other code with
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the library.
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We call this license the "Lesser" General Public License because it
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does Less to protect the user's freedom than the ordinary General
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of an advantage over competing non-free programs. These disadvantages
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In other cases, permission to use a particular library in non-free
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Although the Lesser General Public License is Less protective of the
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engineering for debugging such modifications.
|
||||
|
||||
You must give prominent notice with each copy of the work that the
|
||||
Library is used in it and that the Library and its use are covered by
|
||||
this License. You must supply a copy of this License. If the work
|
||||
during execution displays copyright notices, you must include the
|
||||
copyright notice for the Library among them, as well as a reference
|
||||
directing the user to the copy of this License. Also, you must do one
|
||||
of these things:
|
||||
|
||||
a) Accompany the work with the complete corresponding
|
||||
machine-readable source code for the Library including whatever
|
||||
changes were used in the work (which must be distributed under
|
||||
Sections 1 and 2 above); and, if the work is an executable linked
|
||||
with the Library, with the complete machine-readable "work that
|
||||
uses the Library", as object code and/or source code, so that the
|
||||
user can modify the Library and then relink to produce a modified
|
||||
executable containing the modified Library. (It is understood
|
||||
that the user who changes the contents of definitions files in the
|
||||
Library will not necessarily be able to recompile the application
|
||||
to use the modified definitions.)
|
||||
|
||||
b) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (1) uses at run time a
|
||||
copy of the library already present on the user's computer system,
|
||||
rather than copying library functions into the executable, and (2)
|
||||
will operate properly with a modified version of the library, if
|
||||
the user installs one, as long as the modified version is
|
||||
interface-compatible with the version that the work was made with.
|
||||
|
||||
c) Accompany the work with a written offer, valid for at
|
||||
least three years, to give the same user the materials
|
||||
specified in Subsection 6a, above, for a charge no more
|
||||
than the cost of performing this distribution.
|
||||
|
||||
d) If distribution of the work is made by offering access to copy
|
||||
from a designated place, offer equivalent access to copy the above
|
||||
specified materials from the same place.
|
||||
|
||||
e) Verify that the user has already received a copy of these
|
||||
materials or that you have already sent this user a copy.
|
||||
|
||||
For an executable, the required form of the "work that uses the
|
||||
Library" must include any data and utility programs needed for
|
||||
reproducing the executable from it. However, as a special exception,
|
||||
the materials to be distributed need not include anything that is
|
||||
normally distributed (in either source or binary form) with the major
|
||||
components (compiler, kernel, and so on) of the operating system on
|
||||
which the executable runs, unless that component itself accompanies
|
||||
the executable.
|
||||
|
||||
It may happen that this requirement contradicts the license
|
||||
restrictions of other proprietary libraries that do not normally
|
||||
accompany the operating system. Such a contradiction means you cannot
|
||||
use both them and the Library together in an executable that you
|
||||
distribute.
|
||||
|
||||
7. You may place library facilities that are a work based on the
|
||||
Library side-by-side in a single library together with other library
|
||||
facilities not covered by this License, and distribute such a combined
|
||||
library, provided that the separate distribution of the work based on
|
||||
the Library and of the other library facilities is otherwise
|
||||
permitted, and provided that you do these two things:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work
|
||||
based on the Library, uncombined with any other library
|
||||
facilities. This must be distributed under the terms of the
|
||||
Sections above.
|
||||
|
||||
b) Give prominent notice with the combined library of the fact
|
||||
that part of it is a work based on the Library, and explaining
|
||||
where to find the accompanying uncombined form of the same work.
|
||||
|
||||
8. You may not copy, modify, sublicense, link with, or distribute
|
||||
the Library except as expressly provided under this License. Any
|
||||
attempt otherwise to copy, modify, sublicense, link with, or
|
||||
distribute the Library is void, and will automatically terminate your
|
||||
rights under this License. However, parties who have received copies,
|
||||
or rights, from you under this License will not have their licenses
|
||||
terminated so long as such parties remain in full compliance.
|
||||
|
||||
9. You are not required to accept this License, since you have not
|
||||
signed it. However, nothing else grants you permission to modify or
|
||||
distribute the Library or its derivative works. These actions are
|
||||
prohibited by law if you do not accept this License. Therefore, by
|
||||
modifying or distributing the Library (or any work based on the
|
||||
Library), you indicate your acceptance of this License to do so, and
|
||||
all its terms and conditions for copying, distributing or modifying
|
||||
the Library or works based on it.
|
||||
|
||||
10. Each time you redistribute the Library (or any work based on the
|
||||
Library), the recipient automatically receives a license from the
|
||||
original licensor to copy, distribute, link with or modify the Library
|
||||
subject to these terms and conditions. You may not impose any further
|
||||
restrictions on the recipients' exercise of the rights granted herein.
|
||||
You are not responsible for enforcing compliance by third parties with
|
||||
this License.
|
||||
|
||||
11. If, as a consequence of a court judgment or allegation of patent
|
||||
infringement or for any other reason (not limited to patent issues),
|
||||
conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot
|
||||
distribute so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you
|
||||
may not distribute the Library at all. For example, if a patent
|
||||
license would not permit royalty-free redistribution of the Library by
|
||||
all those who receive copies directly or indirectly through you, then
|
||||
the only way you could satisfy both it and this License would be to
|
||||
refrain entirely from distribution of the Library.
|
||||
|
||||
If any portion of this section is held invalid or unenforceable under any
|
||||
particular circumstance, the balance of the section is intended to apply,
|
||||
and the section as a whole is intended to apply in other circumstances.
|
||||
|
||||
It is not the purpose of this section to induce you to infringe any
|
||||
patents or other property right claims or to contest validity of any
|
||||
such claims; this section has the sole purpose of protecting the
|
||||
integrity of the free software distribution system which is
|
||||
implemented by public license practices. Many people have made
|
||||
generous contributions to the wide range of software distributed
|
||||
through that system in reliance on consistent application of that
|
||||
system; it is up to the author/donor to decide if he or she is willing
|
||||
to distribute software through any other system and a licensee cannot
|
||||
impose that choice.
|
||||
|
||||
This section is intended to make thoroughly clear what is believed to
|
||||
be a consequence of the rest of this License.
|
||||
|
||||
12. If the distribution and/or use of the Library is restricted in
|
||||
certain countries either by patents or by copyrighted interfaces, the
|
||||
original copyright holder who places the Library under this License may add
|
||||
an explicit geographical distribution limitation excluding those countries,
|
||||
so that distribution is permitted only in or among countries not thus
|
||||
excluded. In such case, this License incorporates the limitation as if
|
||||
written in the body of this License.
|
||||
|
||||
13. The Free Software Foundation may publish revised and/or new
|
||||
versions of the Lesser General Public License from time to time.
|
||||
Such new versions will be similar in spirit to the present version,
|
||||
but may differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the Library
|
||||
specifies a version number of this License which applies to it and
|
||||
"any later version", you have the option of following the terms and
|
||||
conditions either of that version or of any later version published by
|
||||
the Free Software Foundation. If the Library does not specify a
|
||||
license version number, you may choose any version ever published by
|
||||
the Free Software Foundation.
|
||||
|
||||
14. If you wish to incorporate parts of the Library into other free
|
||||
programs whose distribution conditions are incompatible with these,
|
||||
write to the author to ask for permission. For software which is
|
||||
copyrighted by the Free Software Foundation, write to the Free
|
||||
Software Foundation; we sometimes make exceptions for this. Our
|
||||
decision will be guided by the two goals of preserving the free status
|
||||
of all derivatives of our free software and of promoting the sharing
|
||||
and reuse of software generally.
|
||||
|
||||
NO WARRANTY
|
||||
|
||||
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
||||
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
||||
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
||||
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
||||
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
||||
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
||||
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
||||
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
||||
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
||||
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
||||
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
||||
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
||||
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
||||
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
||||
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||
DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Libraries
|
||||
|
||||
If you develop a new library, and you want it to be of the greatest
|
||||
possible use to the public, we recommend making it free software that
|
||||
everyone can redistribute and change. You can do so by permitting
|
||||
redistribution under these terms (or, alternatively, under the terms of the
|
||||
ordinary General Public License).
|
||||
|
||||
To apply these terms, attach the following notices to the library. It is
|
||||
safest to attach them to the start of each source file to most effectively
|
||||
convey the exclusion of warranty; and each file should have at least the
|
||||
"copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the library's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
|
||||
USA
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or your
|
||||
school, if any, to sign a "copyright disclaimer" for the library, if
|
||||
necessary. Here is a sample; alter the names:
|
||||
|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
||||
library `Frob' (a library for tweaking knobs) written by James Random
|
||||
Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1990
|
||||
Ty Coon, President of Vice
|
||||
|
||||
That's all there is to it!
|
||||
72
vendor/github.com/missdeer/golib/ic/convutf8.go
generated
vendored
72
vendor/github.com/missdeer/golib/ic/convutf8.go
generated
vendored
@ -1,72 +0,0 @@
|
||||
// Package ic convert text between CJK and UTF-8 in pure Go way
|
||||
package ic
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"io/ioutil"
|
||||
"strings"
|
||||
|
||||
"golang.org/x/text/encoding"
|
||||
"golang.org/x/text/encoding/japanese"
|
||||
"golang.org/x/text/encoding/korean"
|
||||
"golang.org/x/text/encoding/simplifiedchinese"
|
||||
"golang.org/x/text/encoding/traditionalchinese"
|
||||
"golang.org/x/text/transform"
|
||||
)
|
||||
|
||||
var (
|
||||
transformers = map[string]encoding.Encoding{
|
||||
"gbk": simplifiedchinese.GBK,
|
||||
"cp936": simplifiedchinese.GBK,
|
||||
"windows-936": simplifiedchinese.GBK,
|
||||
"gb18030": simplifiedchinese.GB18030,
|
||||
"gb2312": simplifiedchinese.HZGB2312,
|
||||
"big5": traditionalchinese.Big5,
|
||||
"big-5": traditionalchinese.Big5,
|
||||
"cp950": traditionalchinese.Big5,
|
||||
"euc-kr": korean.EUCKR,
|
||||
"euckr": korean.EUCKR,
|
||||
"cp949": korean.EUCKR,
|
||||
"euc-jp": japanese.EUCJP,
|
||||
"eucjp": japanese.EUCJP,
|
||||
"shift-jis": japanese.ShiftJIS,
|
||||
"iso-2022-jp": japanese.ISO2022JP,
|
||||
"cp932": japanese.ISO2022JP,
|
||||
"windows-31j": japanese.ISO2022JP,
|
||||
}
|
||||
)
|
||||
|
||||
// ToUTF8 convert from CJK encoding to UTF-8
|
||||
func ToUTF8(from string, s []byte) ([]byte, error) {
|
||||
var reader *transform.Reader
|
||||
|
||||
transformer, ok := transformers[strings.ToLower(from)]
|
||||
if !ok {
|
||||
return s, errors.New("Unsupported encoding " + from)
|
||||
}
|
||||
reader = transform.NewReader(bytes.NewReader(s), transformer.NewDecoder())
|
||||
|
||||
d, e := ioutil.ReadAll(reader)
|
||||
if e != nil {
|
||||
return nil, e
|
||||
}
|
||||
return d, nil
|
||||
}
|
||||
|
||||
// FromUTF8 convert from UTF-8 encoding to CJK encoding
|
||||
func FromUTF8(to string, s []byte) ([]byte, error) {
|
||||
var reader *transform.Reader
|
||||
|
||||
transformer, ok := transformers[strings.ToLower(to)]
|
||||
if !ok {
|
||||
return s, errors.New("Unsupported encoding " + to)
|
||||
}
|
||||
reader = transform.NewReader(bytes.NewReader(s), transformer.NewEncoder())
|
||||
|
||||
d, e := ioutil.ReadAll(reader)
|
||||
if e != nil {
|
||||
return nil, e
|
||||
}
|
||||
return d, nil
|
||||
}
|
||||
31
vendor/github.com/missdeer/golib/ic/ic.go
generated
vendored
31
vendor/github.com/missdeer/golib/ic/ic.go
generated
vendored
@ -1,31 +0,0 @@
|
||||
package ic
|
||||
|
||||
import "log"
|
||||
|
||||
// Convert convert bytes from CJK or UTF-8 to UTF-8 or CJK
|
||||
func Convert(from string, to string, src []byte) []byte {
|
||||
if to == "utf-8" {
|
||||
out, e := ToUTF8(from, src)
|
||||
if e == nil {
|
||||
return out
|
||||
}
|
||||
log.Printf("converting from %s to UTF-8 failed: %v", from, e)
|
||||
return src
|
||||
}
|
||||
|
||||
if from == "utf-8" {
|
||||
out, e := FromUTF8(to, src)
|
||||
if e == nil {
|
||||
return out
|
||||
}
|
||||
log.Printf("converting from UTF-8 to %s failed: %v", to, e)
|
||||
return src
|
||||
}
|
||||
log.Println("only converting between CJK encodings and UTF-8 is supported")
|
||||
return src
|
||||
}
|
||||
|
||||
// ConvertString convert string from CJK or UTF-8 to UTF-8 or CJK
|
||||
func ConvertString(from string, to string, src string) string {
|
||||
return string(Convert(from, to, []byte(src)))
|
||||
}
|
||||
82
vendor/golang.org/x/text/encoding/unicode/override.go
generated
vendored
Normal file
82
vendor/golang.org/x/text/encoding/unicode/override.go
generated
vendored
Normal file
@ -0,0 +1,82 @@
|
||||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package unicode
|
||||
|
||||
import (
|
||||
"golang.org/x/text/transform"
|
||||
)
|
||||
|
||||
// BOMOverride returns a new decoder transformer that is identical to fallback,
|
||||
// except that the presence of a Byte Order Mark at the start of the input
|
||||
// causes it to switch to the corresponding Unicode decoding. It will only
|
||||
// consider BOMs for UTF-8, UTF-16BE, and UTF-16LE.
|
||||
//
|
||||
// This differs from using ExpectBOM by allowing a BOM to switch to UTF-8, not
|
||||
// just UTF-16 variants, and allowing falling back to any encoding scheme.
|
||||
//
|
||||
// This technique is recommended by the W3C for use in HTML 5: "For
|
||||
// compatibility with deployed content, the byte order mark (also known as BOM)
|
||||
// is considered more authoritative than anything else."
|
||||
// http://www.w3.org/TR/encoding/#specification-hooks
|
||||
//
|
||||
// Using BOMOverride is mostly intended for use cases where the first characters
|
||||
// of a fallback encoding are known to not be a BOM, for example, for valid HTML
|
||||
// and most encodings.
|
||||
func BOMOverride(fallback transform.Transformer) transform.Transformer {
|
||||
// TODO: possibly allow a variadic argument of unicode encodings to allow
|
||||
// specifying details of which fallbacks are supported as well as
|
||||
// specifying the details of the implementations. This would also allow for
|
||||
// support for UTF-32, which should not be supported by default.
|
||||
return &bomOverride{fallback: fallback}
|
||||
}
|
||||
|
||||
type bomOverride struct {
|
||||
fallback transform.Transformer
|
||||
current transform.Transformer
|
||||
}
|
||||
|
||||
func (d *bomOverride) Reset() {
|
||||
d.current = nil
|
||||
d.fallback.Reset()
|
||||
}
|
||||
|
||||
var (
|
||||
// TODO: we could use decode functions here, instead of allocating a new
|
||||
// decoder on every NewDecoder as IgnoreBOM decoders can be stateless.
|
||||
utf16le = UTF16(LittleEndian, IgnoreBOM)
|
||||
utf16be = UTF16(BigEndian, IgnoreBOM)
|
||||
)
|
||||
|
||||
const utf8BOM = "\ufeff"
|
||||
|
||||
func (d *bomOverride) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if d.current != nil {
|
||||
return d.current.Transform(dst, src, atEOF)
|
||||
}
|
||||
if len(src) < 3 && !atEOF {
|
||||
return 0, 0, transform.ErrShortSrc
|
||||
}
|
||||
d.current = d.fallback
|
||||
bomSize := 0
|
||||
if len(src) >= 2 {
|
||||
if src[0] == 0xFF && src[1] == 0xFE {
|
||||
d.current = utf16le.NewDecoder()
|
||||
bomSize = 2
|
||||
} else if src[0] == 0xFE && src[1] == 0xFF {
|
||||
d.current = utf16be.NewDecoder()
|
||||
bomSize = 2
|
||||
} else if len(src) >= 3 &&
|
||||
src[0] == utf8BOM[0] &&
|
||||
src[1] == utf8BOM[1] &&
|
||||
src[2] == utf8BOM[2] {
|
||||
d.current = transform.Nop
|
||||
bomSize = 3
|
||||
}
|
||||
}
|
||||
if bomSize < len(src) {
|
||||
nDst, nSrc, err = d.current.Transform(dst, src[bomSize:], atEOF)
|
||||
}
|
||||
return nDst, nSrc + bomSize, err
|
||||
}
|
||||
512
vendor/golang.org/x/text/encoding/unicode/unicode.go
generated
vendored
Normal file
512
vendor/golang.org/x/text/encoding/unicode/unicode.go
generated
vendored
Normal file
@ -0,0 +1,512 @@
|
||||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Package unicode provides Unicode encodings such as UTF-16.
|
||||
package unicode // import "golang.org/x/text/encoding/unicode"
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"unicode/utf16"
|
||||
"unicode/utf8"
|
||||
|
||||
"golang.org/x/text/encoding"
|
||||
"golang.org/x/text/encoding/internal"
|
||||
"golang.org/x/text/encoding/internal/identifier"
|
||||
"golang.org/x/text/internal/utf8internal"
|
||||
"golang.org/x/text/runes"
|
||||
"golang.org/x/text/transform"
|
||||
)
|
||||
|
||||
// TODO: I think the Transformers really should return errors on unmatched
|
||||
// surrogate pairs and odd numbers of bytes. This is not required by RFC 2781,
|
||||
// which leaves it open, but is suggested by WhatWG. It will allow for all error
|
||||
// modes as defined by WhatWG: fatal, HTML and Replacement. This would require
|
||||
// the introduction of some kind of error type for conveying the erroneous code
|
||||
// point.
|
||||
|
||||
// UTF8 is the UTF-8 encoding. It neither removes nor adds byte order marks.
|
||||
var UTF8 encoding.Encoding = utf8enc
|
||||
|
||||
// UTF8BOM is an UTF-8 encoding where the decoder strips a leading byte order
|
||||
// mark while the encoder adds one.
|
||||
//
|
||||
// Some editors add a byte order mark as a signature to UTF-8 files. Although
|
||||
// the byte order mark is not useful for detecting byte order in UTF-8, it is
|
||||
// sometimes used as a convention to mark UTF-8-encoded files. This relies on
|
||||
// the observation that the UTF-8 byte order mark is either an illegal or at
|
||||
// least very unlikely sequence in any other character encoding.
|
||||
var UTF8BOM encoding.Encoding = utf8bomEncoding{}
|
||||
|
||||
type utf8bomEncoding struct{}
|
||||
|
||||
func (utf8bomEncoding) String() string {
|
||||
return "UTF-8-BOM"
|
||||
}
|
||||
|
||||
func (utf8bomEncoding) ID() (identifier.MIB, string) {
|
||||
return identifier.Unofficial, "x-utf8bom"
|
||||
}
|
||||
|
||||
func (utf8bomEncoding) NewEncoder() *encoding.Encoder {
|
||||
return &encoding.Encoder{
|
||||
Transformer: &utf8bomEncoder{t: runes.ReplaceIllFormed()},
|
||||
}
|
||||
}
|
||||
|
||||
func (utf8bomEncoding) NewDecoder() *encoding.Decoder {
|
||||
return &encoding.Decoder{Transformer: &utf8bomDecoder{}}
|
||||
}
|
||||
|
||||
var utf8enc = &internal.Encoding{
|
||||
&internal.SimpleEncoding{utf8Decoder{}, runes.ReplaceIllFormed()},
|
||||
"UTF-8",
|
||||
identifier.UTF8,
|
||||
}
|
||||
|
||||
type utf8bomDecoder struct {
|
||||
checked bool
|
||||
}
|
||||
|
||||
func (t *utf8bomDecoder) Reset() {
|
||||
t.checked = false
|
||||
}
|
||||
|
||||
func (t *utf8bomDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if !t.checked {
|
||||
if !atEOF && len(src) < len(utf8BOM) {
|
||||
if len(src) == 0 {
|
||||
return 0, 0, nil
|
||||
}
|
||||
return 0, 0, transform.ErrShortSrc
|
||||
}
|
||||
if bytes.HasPrefix(src, []byte(utf8BOM)) {
|
||||
nSrc += len(utf8BOM)
|
||||
src = src[len(utf8BOM):]
|
||||
}
|
||||
t.checked = true
|
||||
}
|
||||
nDst, n, err := utf8Decoder.Transform(utf8Decoder{}, dst[nDst:], src, atEOF)
|
||||
nSrc += n
|
||||
return nDst, nSrc, err
|
||||
}
|
||||
|
||||
type utf8bomEncoder struct {
|
||||
written bool
|
||||
t transform.Transformer
|
||||
}
|
||||
|
||||
func (t *utf8bomEncoder) Reset() {
|
||||
t.written = false
|
||||
t.t.Reset()
|
||||
}
|
||||
|
||||
func (t *utf8bomEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if !t.written {
|
||||
if len(dst) < len(utf8BOM) {
|
||||
return nDst, 0, transform.ErrShortDst
|
||||
}
|
||||
nDst = copy(dst, utf8BOM)
|
||||
t.written = true
|
||||
}
|
||||
n, nSrc, err := utf8Decoder.Transform(utf8Decoder{}, dst[nDst:], src, atEOF)
|
||||
nDst += n
|
||||
return nDst, nSrc, err
|
||||
}
|
||||
|
||||
type utf8Decoder struct{ transform.NopResetter }
|
||||
|
||||
func (utf8Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
var pSrc int // point from which to start copy in src
|
||||
var accept utf8internal.AcceptRange
|
||||
|
||||
// The decoder can only make the input larger, not smaller.
|
||||
n := len(src)
|
||||
if len(dst) < n {
|
||||
err = transform.ErrShortDst
|
||||
n = len(dst)
|
||||
atEOF = false
|
||||
}
|
||||
for nSrc < n {
|
||||
c := src[nSrc]
|
||||
if c < utf8.RuneSelf {
|
||||
nSrc++
|
||||
continue
|
||||
}
|
||||
first := utf8internal.First[c]
|
||||
size := int(first & utf8internal.SizeMask)
|
||||
if first == utf8internal.FirstInvalid {
|
||||
goto handleInvalid // invalid starter byte
|
||||
}
|
||||
accept = utf8internal.AcceptRanges[first>>utf8internal.AcceptShift]
|
||||
if nSrc+size > n {
|
||||
if !atEOF {
|
||||
// We may stop earlier than necessary here if the short sequence
|
||||
// has invalid bytes. Not checking for this simplifies the code
|
||||
// and may avoid duplicate computations in certain conditions.
|
||||
if err == nil {
|
||||
err = transform.ErrShortSrc
|
||||
}
|
||||
break
|
||||
}
|
||||
// Determine the maximal subpart of an ill-formed subsequence.
|
||||
switch {
|
||||
case nSrc+1 >= n || src[nSrc+1] < accept.Lo || accept.Hi < src[nSrc+1]:
|
||||
size = 1
|
||||
case nSrc+2 >= n || src[nSrc+2] < utf8internal.LoCB || utf8internal.HiCB < src[nSrc+2]:
|
||||
size = 2
|
||||
default:
|
||||
size = 3 // As we are short, the maximum is 3.
|
||||
}
|
||||
goto handleInvalid
|
||||
}
|
||||
if c = src[nSrc+1]; c < accept.Lo || accept.Hi < c {
|
||||
size = 1
|
||||
goto handleInvalid // invalid continuation byte
|
||||
} else if size == 2 {
|
||||
} else if c = src[nSrc+2]; c < utf8internal.LoCB || utf8internal.HiCB < c {
|
||||
size = 2
|
||||
goto handleInvalid // invalid continuation byte
|
||||
} else if size == 3 {
|
||||
} else if c = src[nSrc+3]; c < utf8internal.LoCB || utf8internal.HiCB < c {
|
||||
size = 3
|
||||
goto handleInvalid // invalid continuation byte
|
||||
}
|
||||
nSrc += size
|
||||
continue
|
||||
|
||||
handleInvalid:
|
||||
// Copy the scanned input so far.
|
||||
nDst += copy(dst[nDst:], src[pSrc:nSrc])
|
||||
|
||||
// Append RuneError to the destination.
|
||||
const runeError = "\ufffd"
|
||||
if nDst+len(runeError) > len(dst) {
|
||||
return nDst, nSrc, transform.ErrShortDst
|
||||
}
|
||||
nDst += copy(dst[nDst:], runeError)
|
||||
|
||||
// Skip the maximal subpart of an ill-formed subsequence according to
|
||||
// the W3C standard way instead of the Go way. This Transform is
|
||||
// probably the only place in the text repo where it is warranted.
|
||||
nSrc += size
|
||||
pSrc = nSrc
|
||||
|
||||
// Recompute the maximum source length.
|
||||
if sz := len(dst) - nDst; sz < len(src)-nSrc {
|
||||
err = transform.ErrShortDst
|
||||
n = nSrc + sz
|
||||
atEOF = false
|
||||
}
|
||||
}
|
||||
return nDst + copy(dst[nDst:], src[pSrc:nSrc]), nSrc, err
|
||||
}
|
||||
|
||||
// UTF16 returns a UTF-16 Encoding for the given default endianness and byte
|
||||
// order mark (BOM) policy.
|
||||
//
|
||||
// When decoding from UTF-16 to UTF-8, if the BOMPolicy is IgnoreBOM then
|
||||
// neither BOMs U+FEFF nor noncharacters U+FFFE in the input stream will affect
|
||||
// the endianness used for decoding, and will instead be output as their
|
||||
// standard UTF-8 encodings: "\xef\xbb\xbf" and "\xef\xbf\xbe". If the BOMPolicy
|
||||
// is UseBOM or ExpectBOM a staring BOM is not written to the UTF-8 output.
|
||||
// Instead, it overrides the default endianness e for the remainder of the
|
||||
// transformation. Any subsequent BOMs U+FEFF or noncharacters U+FFFE will not
|
||||
// affect the endianness used, and will instead be output as their standard
|
||||
// UTF-8 encodings. For UseBOM, if there is no starting BOM, it will proceed
|
||||
// with the default Endianness. For ExpectBOM, in that case, the transformation
|
||||
// will return early with an ErrMissingBOM error.
|
||||
//
|
||||
// When encoding from UTF-8 to UTF-16, a BOM will be inserted at the start of
|
||||
// the output if the BOMPolicy is UseBOM or ExpectBOM. Otherwise, a BOM will not
|
||||
// be inserted. The UTF-8 input does not need to contain a BOM.
|
||||
//
|
||||
// There is no concept of a 'native' endianness. If the UTF-16 data is produced
|
||||
// and consumed in a greater context that implies a certain endianness, use
|
||||
// IgnoreBOM. Otherwise, use ExpectBOM and always produce and consume a BOM.
|
||||
//
|
||||
// In the language of https://www.unicode.org/faq/utf_bom.html#bom10, IgnoreBOM
|
||||
// corresponds to "Where the precise type of the data stream is known... the
|
||||
// BOM should not be used" and ExpectBOM corresponds to "A particular
|
||||
// protocol... may require use of the BOM".
|
||||
func UTF16(e Endianness, b BOMPolicy) encoding.Encoding {
|
||||
return utf16Encoding{config{e, b}, mibValue[e][b&bomMask]}
|
||||
}
|
||||
|
||||
// mibValue maps Endianness and BOMPolicy settings to MIB constants. Note that
|
||||
// some configurations map to the same MIB identifier. RFC 2781 has requirements
|
||||
// and recommendations. Some of the "configurations" are merely recommendations,
|
||||
// so multiple configurations could match.
|
||||
var mibValue = map[Endianness][numBOMValues]identifier.MIB{
|
||||
BigEndian: [numBOMValues]identifier.MIB{
|
||||
IgnoreBOM: identifier.UTF16BE,
|
||||
UseBOM: identifier.UTF16, // BigEnding default is preferred by RFC 2781.
|
||||
// TODO: acceptBOM | strictBOM would map to UTF16BE as well.
|
||||
},
|
||||
LittleEndian: [numBOMValues]identifier.MIB{
|
||||
IgnoreBOM: identifier.UTF16LE,
|
||||
UseBOM: identifier.UTF16, // LittleEndian default is allowed and preferred on Windows.
|
||||
// TODO: acceptBOM | strictBOM would map to UTF16LE as well.
|
||||
},
|
||||
// ExpectBOM is not widely used and has no valid MIB identifier.
|
||||
}
|
||||
|
||||
// All lists a configuration for each IANA-defined UTF-16 variant.
|
||||
var All = []encoding.Encoding{
|
||||
UTF8,
|
||||
UTF16(BigEndian, UseBOM),
|
||||
UTF16(BigEndian, IgnoreBOM),
|
||||
UTF16(LittleEndian, IgnoreBOM),
|
||||
}
|
||||
|
||||
// BOMPolicy is a UTF-16 encoding's byte order mark policy.
|
||||
type BOMPolicy uint8
|
||||
|
||||
const (
|
||||
writeBOM BOMPolicy = 0x01
|
||||
acceptBOM BOMPolicy = 0x02
|
||||
requireBOM BOMPolicy = 0x04
|
||||
bomMask BOMPolicy = 0x07
|
||||
|
||||
// HACK: numBOMValues == 8 triggers a bug in the 1.4 compiler (cannot have a
|
||||
// map of an array of length 8 of a type that is also used as a key or value
|
||||
// in another map). See golang.org/issue/11354.
|
||||
// TODO: consider changing this value back to 8 if the use of 1.4.* has
|
||||
// been minimized.
|
||||
numBOMValues = 8 + 1
|
||||
|
||||
// IgnoreBOM means to ignore any byte order marks.
|
||||
IgnoreBOM BOMPolicy = 0
|
||||
// Common and RFC 2781-compliant interpretation for UTF-16BE/LE.
|
||||
|
||||
// UseBOM means that the UTF-16 form may start with a byte order mark, which
|
||||
// will be used to override the default encoding.
|
||||
UseBOM BOMPolicy = writeBOM | acceptBOM
|
||||
// Common and RFC 2781-compliant interpretation for UTF-16.
|
||||
|
||||
// ExpectBOM means that the UTF-16 form must start with a byte order mark,
|
||||
// which will be used to override the default encoding.
|
||||
ExpectBOM BOMPolicy = writeBOM | acceptBOM | requireBOM
|
||||
// Used in Java as Unicode (not to be confused with Java's UTF-16) and
|
||||
// ICU's UTF-16,version=1. Not compliant with RFC 2781.
|
||||
|
||||
// TODO (maybe): strictBOM: BOM must match Endianness. This would allow:
|
||||
// - UTF-16(B|L)E,version=1: writeBOM | acceptBOM | requireBOM | strictBOM
|
||||
// (UnicodeBig and UnicodeLittle in Java)
|
||||
// - RFC 2781-compliant, but less common interpretation for UTF-16(B|L)E:
|
||||
// acceptBOM | strictBOM (e.g. assigned to CheckBOM).
|
||||
// This addition would be consistent with supporting ExpectBOM.
|
||||
)
|
||||
|
||||
// Endianness is a UTF-16 encoding's default endianness.
|
||||
type Endianness bool
|
||||
|
||||
const (
|
||||
// BigEndian is UTF-16BE.
|
||||
BigEndian Endianness = false
|
||||
// LittleEndian is UTF-16LE.
|
||||
LittleEndian Endianness = true
|
||||
)
|
||||
|
||||
// ErrMissingBOM means that decoding UTF-16 input with ExpectBOM did not find a
|
||||
// starting byte order mark.
|
||||
var ErrMissingBOM = errors.New("encoding: missing byte order mark")
|
||||
|
||||
type utf16Encoding struct {
|
||||
config
|
||||
mib identifier.MIB
|
||||
}
|
||||
|
||||
type config struct {
|
||||
endianness Endianness
|
||||
bomPolicy BOMPolicy
|
||||
}
|
||||
|
||||
func (u utf16Encoding) NewDecoder() *encoding.Decoder {
|
||||
return &encoding.Decoder{Transformer: &utf16Decoder{
|
||||
initial: u.config,
|
||||
current: u.config,
|
||||
}}
|
||||
}
|
||||
|
||||
func (u utf16Encoding) NewEncoder() *encoding.Encoder {
|
||||
return &encoding.Encoder{Transformer: &utf16Encoder{
|
||||
endianness: u.endianness,
|
||||
initialBOMPolicy: u.bomPolicy,
|
||||
currentBOMPolicy: u.bomPolicy,
|
||||
}}
|
||||
}
|
||||
|
||||
func (u utf16Encoding) ID() (mib identifier.MIB, other string) {
|
||||
return u.mib, ""
|
||||
}
|
||||
|
||||
func (u utf16Encoding) String() string {
|
||||
e, b := "B", ""
|
||||
if u.endianness == LittleEndian {
|
||||
e = "L"
|
||||
}
|
||||
switch u.bomPolicy {
|
||||
case ExpectBOM:
|
||||
b = "Expect"
|
||||
case UseBOM:
|
||||
b = "Use"
|
||||
case IgnoreBOM:
|
||||
b = "Ignore"
|
||||
}
|
||||
return "UTF-16" + e + "E (" + b + " BOM)"
|
||||
}
|
||||
|
||||
type utf16Decoder struct {
|
||||
initial config
|
||||
current config
|
||||
}
|
||||
|
||||
func (u *utf16Decoder) Reset() {
|
||||
u.current = u.initial
|
||||
}
|
||||
|
||||
func (u *utf16Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if len(src) < 2 && atEOF && u.current.bomPolicy&requireBOM != 0 {
|
||||
return 0, 0, ErrMissingBOM
|
||||
}
|
||||
if len(src) == 0 {
|
||||
return 0, 0, nil
|
||||
}
|
||||
if len(src) >= 2 && u.current.bomPolicy&acceptBOM != 0 {
|
||||
switch {
|
||||
case src[0] == 0xfe && src[1] == 0xff:
|
||||
u.current.endianness = BigEndian
|
||||
nSrc = 2
|
||||
case src[0] == 0xff && src[1] == 0xfe:
|
||||
u.current.endianness = LittleEndian
|
||||
nSrc = 2
|
||||
default:
|
||||
if u.current.bomPolicy&requireBOM != 0 {
|
||||
return 0, 0, ErrMissingBOM
|
||||
}
|
||||
}
|
||||
u.current.bomPolicy = IgnoreBOM
|
||||
}
|
||||
|
||||
var r rune
|
||||
var dSize, sSize int
|
||||
for nSrc < len(src) {
|
||||
if nSrc+1 < len(src) {
|
||||
x := uint16(src[nSrc+0])<<8 | uint16(src[nSrc+1])
|
||||
if u.current.endianness == LittleEndian {
|
||||
x = x>>8 | x<<8
|
||||
}
|
||||
r, sSize = rune(x), 2
|
||||
if utf16.IsSurrogate(r) {
|
||||
if nSrc+3 < len(src) {
|
||||
x = uint16(src[nSrc+2])<<8 | uint16(src[nSrc+3])
|
||||
if u.current.endianness == LittleEndian {
|
||||
x = x>>8 | x<<8
|
||||
}
|
||||
// Save for next iteration if it is not a high surrogate.
|
||||
if isHighSurrogate(rune(x)) {
|
||||
r, sSize = utf16.DecodeRune(r, rune(x)), 4
|
||||
}
|
||||
} else if !atEOF {
|
||||
err = transform.ErrShortSrc
|
||||
break
|
||||
}
|
||||
}
|
||||
if dSize = utf8.RuneLen(r); dSize < 0 {
|
||||
r, dSize = utf8.RuneError, 3
|
||||
}
|
||||
} else if atEOF {
|
||||
// Single trailing byte.
|
||||
r, dSize, sSize = utf8.RuneError, 3, 1
|
||||
} else {
|
||||
err = transform.ErrShortSrc
|
||||
break
|
||||
}
|
||||
if nDst+dSize > len(dst) {
|
||||
err = transform.ErrShortDst
|
||||
break
|
||||
}
|
||||
nDst += utf8.EncodeRune(dst[nDst:], r)
|
||||
nSrc += sSize
|
||||
}
|
||||
return nDst, nSrc, err
|
||||
}
|
||||
|
||||
func isHighSurrogate(r rune) bool {
|
||||
return 0xDC00 <= r && r <= 0xDFFF
|
||||
}
|
||||
|
||||
type utf16Encoder struct {
|
||||
endianness Endianness
|
||||
initialBOMPolicy BOMPolicy
|
||||
currentBOMPolicy BOMPolicy
|
||||
}
|
||||
|
||||
func (u *utf16Encoder) Reset() {
|
||||
u.currentBOMPolicy = u.initialBOMPolicy
|
||||
}
|
||||
|
||||
func (u *utf16Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if u.currentBOMPolicy&writeBOM != 0 {
|
||||
if len(dst) < 2 {
|
||||
return 0, 0, transform.ErrShortDst
|
||||
}
|
||||
dst[0], dst[1] = 0xfe, 0xff
|
||||
u.currentBOMPolicy = IgnoreBOM
|
||||
nDst = 2
|
||||
}
|
||||
|
||||
r, size := rune(0), 0
|
||||
for nSrc < len(src) {
|
||||
r = rune(src[nSrc])
|
||||
|
||||
// Decode a 1-byte rune.
|
||||
if r < utf8.RuneSelf {
|
||||
size = 1
|
||||
|
||||
} else {
|
||||
// Decode a multi-byte rune.
|
||||
r, size = utf8.DecodeRune(src[nSrc:])
|
||||
if size == 1 {
|
||||
// All valid runes of size 1 (those below utf8.RuneSelf) were
|
||||
// handled above. We have invalid UTF-8 or we haven't seen the
|
||||
// full character yet.
|
||||
if !atEOF && !utf8.FullRune(src[nSrc:]) {
|
||||
err = transform.ErrShortSrc
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if r <= 0xffff {
|
||||
if nDst+2 > len(dst) {
|
||||
err = transform.ErrShortDst
|
||||
break
|
||||
}
|
||||
dst[nDst+0] = uint8(r >> 8)
|
||||
dst[nDst+1] = uint8(r)
|
||||
nDst += 2
|
||||
} else {
|
||||
if nDst+4 > len(dst) {
|
||||
err = transform.ErrShortDst
|
||||
break
|
||||
}
|
||||
r1, r2 := utf16.EncodeRune(r)
|
||||
dst[nDst+0] = uint8(r1 >> 8)
|
||||
dst[nDst+1] = uint8(r1)
|
||||
dst[nDst+2] = uint8(r2 >> 8)
|
||||
dst[nDst+3] = uint8(r2)
|
||||
nDst += 4
|
||||
}
|
||||
nSrc += size
|
||||
}
|
||||
|
||||
if u.endianness == LittleEndian {
|
||||
for i := 0; i < nDst; i += 2 {
|
||||
dst[i], dst[i+1] = dst[i+1], dst[i]
|
||||
}
|
||||
}
|
||||
return nDst, nSrc, err
|
||||
}
|
||||
87
vendor/golang.org/x/text/internal/utf8internal/utf8internal.go
generated
vendored
Normal file
87
vendor/golang.org/x/text/internal/utf8internal/utf8internal.go
generated
vendored
Normal file
@ -0,0 +1,87 @@
|
||||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Package utf8internal contains low-level utf8-related constants, tables, etc.
|
||||
// that are used internally by the text package.
|
||||
package utf8internal
|
||||
|
||||
// The default lowest and highest continuation byte.
|
||||
const (
|
||||
LoCB = 0x80 // 1000 0000
|
||||
HiCB = 0xBF // 1011 1111
|
||||
)
|
||||
|
||||
// Constants related to getting information of first bytes of UTF-8 sequences.
|
||||
const (
|
||||
// ASCII identifies a UTF-8 byte as ASCII.
|
||||
ASCII = as
|
||||
|
||||
// FirstInvalid indicates a byte is invalid as a first byte of a UTF-8
|
||||
// sequence.
|
||||
FirstInvalid = xx
|
||||
|
||||
// SizeMask is a mask for the size bits. Use use x&SizeMask to get the size.
|
||||
SizeMask = 7
|
||||
|
||||
// AcceptShift is the right-shift count for the first byte info byte to get
|
||||
// the index into the AcceptRanges table. See AcceptRanges.
|
||||
AcceptShift = 4
|
||||
|
||||
// The names of these constants are chosen to give nice alignment in the
|
||||
// table below. The first nibble is an index into acceptRanges or F for
|
||||
// special one-byte cases. The second nibble is the Rune length or the
|
||||
// Status for the special one-byte case.
|
||||
xx = 0xF1 // invalid: size 1
|
||||
as = 0xF0 // ASCII: size 1
|
||||
s1 = 0x02 // accept 0, size 2
|
||||
s2 = 0x13 // accept 1, size 3
|
||||
s3 = 0x03 // accept 0, size 3
|
||||
s4 = 0x23 // accept 2, size 3
|
||||
s5 = 0x34 // accept 3, size 4
|
||||
s6 = 0x04 // accept 0, size 4
|
||||
s7 = 0x44 // accept 4, size 4
|
||||
)
|
||||
|
||||
// First is information about the first byte in a UTF-8 sequence.
|
||||
var First = [256]uint8{
|
||||
// 1 2 3 4 5 6 7 8 9 A B C D E F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x00-0x0F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x10-0x1F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x20-0x2F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x30-0x3F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x40-0x4F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x50-0x5F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x60-0x6F
|
||||
as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x70-0x7F
|
||||
// 1 2 3 4 5 6 7 8 9 A B C D E F
|
||||
xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x80-0x8F
|
||||
xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x90-0x9F
|
||||
xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xA0-0xAF
|
||||
xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xB0-0xBF
|
||||
xx, xx, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xC0-0xCF
|
||||
s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xD0-0xDF
|
||||
s2, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s4, s3, s3, // 0xE0-0xEF
|
||||
s5, s6, s6, s6, s7, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xF0-0xFF
|
||||
}
|
||||
|
||||
// AcceptRange gives the range of valid values for the second byte in a UTF-8
|
||||
// sequence for any value for First that is not ASCII or FirstInvalid.
|
||||
type AcceptRange struct {
|
||||
Lo uint8 // lowest value for second byte.
|
||||
Hi uint8 // highest value for second byte.
|
||||
}
|
||||
|
||||
// AcceptRanges is a slice of AcceptRange values. For a given byte sequence b
|
||||
//
|
||||
// AcceptRanges[First[b[0]]>>AcceptShift]
|
||||
//
|
||||
// will give the value of AcceptRange for the multi-byte UTF-8 sequence starting
|
||||
// at b[0].
|
||||
var AcceptRanges = [...]AcceptRange{
|
||||
0: {LoCB, HiCB},
|
||||
1: {0xA0, HiCB},
|
||||
2: {LoCB, 0x9F},
|
||||
3: {0x90, HiCB},
|
||||
4: {LoCB, 0x8F},
|
||||
}
|
||||
5
vendor/modules.txt
vendored
5
vendor/modules.txt
vendored
@ -281,9 +281,6 @@ github.com/minio/minio-go/v7/pkg/tags
|
||||
# github.com/minio/sha256-simd v1.0.0
|
||||
## explicit; go 1.13
|
||||
github.com/minio/sha256-simd
|
||||
# github.com/missdeer/golib v1.0.4
|
||||
## explicit; go 1.12
|
||||
github.com/missdeer/golib/ic
|
||||
# github.com/mitchellh/go-homedir v1.1.0
|
||||
## explicit
|
||||
github.com/mitchellh/go-homedir
|
||||
@ -526,9 +523,11 @@ golang.org/x/text/encoding/japanese
|
||||
golang.org/x/text/encoding/korean
|
||||
golang.org/x/text/encoding/simplifiedchinese
|
||||
golang.org/x/text/encoding/traditionalchinese
|
||||
golang.org/x/text/encoding/unicode
|
||||
golang.org/x/text/internal/language
|
||||
golang.org/x/text/internal/language/compact
|
||||
golang.org/x/text/internal/tag
|
||||
golang.org/x/text/internal/utf8internal
|
||||
golang.org/x/text/language
|
||||
golang.org/x/text/runes
|
||||
golang.org/x/text/secure/bidirule
|
||||
|
||||
Loading…
Reference in New Issue
Block a user