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Eneboo - Documentación para desarrolladores
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Eneboo - Documentación para desarrolladores
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The QGb18030Codec class provides conversion to and from the Chinese GB18030/GBK/GB2312 encoding. Más...
#include <qgb18030codec.h>
Métodos públicos | |
| QGb18030Codec () | |
| int | mibEnum () const |
| const char * | name () const |
| QTextDecoder * | makeDecoder () const |
| QCString | fromUnicode (const QString &uc, int &lenInOut) const |
| QString | toUnicode (const char *chars, int len) const |
| int | heuristicContentMatch (const char *chars, int len) const |
| int | heuristicNameMatch (const char *hint) const |
| QGb18030Codec () | |
| int | mibEnum () const |
| const char * | name () const |
| QTextDecoder * | makeDecoder () const |
| QCString | fromUnicode (const QString &uc, int &lenInOut) const |
| QString | toUnicode (const char *chars, int len) const |
| int | heuristicContentMatch (const char *chars, int len) const |
| int | heuristicNameMatch (const char *hint) const |
The QGb18030Codec class provides conversion to and from the Chinese GB18030/GBK/GB2312 encoding.
Last updated: September, 3, 2002
GBK, formally the Chinese Internal Code Specification, is a commonly used extension of GB 2312-80. Microsoft Windows uses it under the name codepage 936.
GBK has been superceded by the new Chinese national standard GB 18030-2000, which added a 4-byte encoding while remaining compatible with GB2312 and GBK. The new GB 18030-2000 may be described as a special encoding of Unicode 3.x and ISO-10646-1.
Special thanks to charset gurus Markus Scherer (IBM), Dirk Meyer (Adobe Systems) and Ken Lunde (Adobe Systems) for publishing an excellent GB 18030-2000 summary and specification on the Internet. Some must-read documents are: {ftp://ftp.oreilly.com/pub/examples/nutshell/cjkv/pdf/GB18030_Summary.pdf} {http://oss.software.ibm.com/cvs/icu/~checkout~/charset/source/gb18030/gb18030.html} {http://oss.software.ibm.com/cvs/icu/~checkout~/charset/data/xml/gb-18030-2000.xml}
The GBK codec was contributed to Qt by Justin Yu <justiny@turbolinux.com.cn> and Sean Chen <seanc@turbolinux.com.cn>. They may also be reached at Yu Mingjian <yumj@sun.ihep.ac.cn>, <yumingjian@china.com> Chen Xiangyang <chenxy@sun.ihep.ac.cn>
The GB18030 codec Qt functions were contributed to Qt by James Su <suzhe@gnuchina.org>, <suzhe@turbolinux.com.cn> who pioneered much of GB18030 development on GNU/Linux systems.
The GB18030 codec was contributed to Qt by Anthony Fok <anthony@thizlinux.com>, <foka@debian.org> using a Perl script to generate C++ tables from gb-18030-2000.xml while merging contributions from James Su, Justin Yu and Sean Chen. A copy of the source Perl script is available at:
{http://people.debian.org/~foka/gb18030/gen-qgb18030codec.pl}
The copyright notice for their code follows:
Copyright (C) 2000 TurboLinux, Inc. Written by Justin Yu and Sean Chen. Copyright (C) 2001, 2002 Turbolinux, Inc. Written by James Su. Copyright (C) 2001, 2002 ThizLinux Laboratory Ltd. Written by Anthony Fok.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1 Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
| QGb18030Codec::QGb18030Codec | ( | ) |
| QGb18030Codec::QGb18030Codec | ( | ) |
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
QTextCodec subclasses must reimplement either this function or makeEncoder(). It converts the first lenInOut characters of uc from Unicode to the encoding of the subclass. If lenInOut is negative or too large, the length of uc is used instead.
Converts lenInOut characters (not bytes) from uc, producing a QCString. lenInOut will be set to the length of the result (in bytes).
The default implementation makes an encoder with makeEncoder() and converts the input with that. Note that the default makeEncoder() implementation makes an encoder that simply calls this function, hence subclasses must reimplement one function or the other to avoid infinite recursion.
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
QTextCodec subclasses must reimplement this function. It examines the first len bytes of chars and returns a value indicating how likely it is that the string is a prefix of text encoded in the encoding of the subclass. A negative return value indicates that the text is detectably not in the encoding (e.g. it contains characters undefined in the encoding). A return value of 0 indicates that the text should be decoded with this codec rather than as ASCII, but there is no particular evidence. The value should range up to len. Thus, most decoders will return -1, 0, or -len.
The characters are not null terminated.
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| int QGb18030Codec::heuristicNameMatch | ( | const char * | hint | ) | const [virtual] |
Returns a value indicating how likely it is that this decoder is appropriate for decoding some format that has the given name. The name is compared with the hint.
A good match returns a positive number around the length of the string. A bad match is negative.
The default implementation calls simpleHeuristicNameMatch() with the name of the codec.
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| int QGb18030Codec::heuristicNameMatch | ( | const char * | hint | ) | const [virtual] |
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| QTextDecoder* QGb18030Codec::makeDecoder | ( | ) | const [virtual] |
Creates a QTextDecoder which stores enough state to decode chunks of char* data to create chunks of Unicode data. The default implementation creates a stateless decoder, which is only sufficient for the simplest encodings where each byte corresponds to exactly one Unicode character.
The caller is responsible for deleting the returned object.
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| QTextDecoder * QGb18030Codec::makeDecoder | ( | ) | const [virtual] |
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| int QGb18030Codec::mibEnum | ( | ) | const [virtual] |
Subclasses of QTextCodec must reimplement this function. It returns the MIBenum (see the IANA character-sets encoding file for more information). It is important that each QTextCodec subclass returns the correct unique value for this function.
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| int QGb18030Codec::mibEnum | ( | ) | const [virtual] |
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| const char* QGb18030Codec::name | ( | ) | const [virtual] |
QTextCodec subclasses must reimplement this function. It returns the name of the encoding supported by the subclass. When choosing a name for an encoding, consider these points: On X11, heuristicNameMatch( const char * hint ) is used to test if a the QTextCodec can convert between Unicode and the encoding of a font with encoding hint, such as "iso8859-1" for Latin-1 fonts, "koi8-r" for Russian KOI8 fonts. The default algorithm of heuristicNameMatch() uses name(). Some applications may use this function to present encodings to the end user.
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
| const char * QGb18030Codec::name | ( | ) | const [virtual] |
Implementa QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
QTextCodec subclasses must reimplement this function or makeDecoder(). It converts the first len characters of chars to Unicode.
The default implementation makes a decoder with makeDecoder() and converts the input with that. Note that the default makeDecoder() implementation makes a decoder that simply calls this function, hence subclasses must reimplement one function or the other to avoid infinite recursion.
Reimplementado de QTextCodec.
Reimplementado en QGbkCodec, QGb2312Codec, QGbkCodec y QGb2312Codec.
1.7.4
