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Eneboo - Documentación para desarrolladores
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Eneboo - Documentación para desarrolladores
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The QBig5Codec class provides conversion to and from the Big5 encoding. Más...
#include <qbig5codec.h>
Métodos públicos | |
| virtual 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 |
| virtual 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 QBig5Codec class provides conversion to and from the Big5 encoding.
QBig5Codec was originally contributed by Ming-Che Chuang <mingche@cobra.ee.ntu.edu.tw> for the Big-5+ encoding, and was included in Qt with the author's permission, and the grateful thanks of the Trolltech team. (Note: Ming-Che's code is QPL'd, as per an mail to info@trolltech.com.)
However, since Big-5+ was never formally approved, and was never used by anyone, the Taiwan Free Software community and the Li18nux Big5 Standard Subgroup agree that the de-facto standard Big5-ETen (zh_TW.Big5 or zh_TW.TW-Big5) be used instead.
QBig5Codec is currently implemented as a pure subset of QBig5hkscsCodec, so more fine-tuning is needed to make it identical to the standard Big5 mapping as determined by Li18nux-Big5. See {http://www.autrijus.org/xml/} for the draft Big5 (2002) standard.
James Su <suzhe@turbolinux.com.cn> <suzhe@gnuchina.org> generated the Big5-HKSCS<->Unicode tables with a very space-efficient algorithm. He generously donated his code to glibc in May 2002. Subsequently, James has kindly allowed Anthony Fok <anthony@thizlinux.com> <foka@debian.org> to adapt the code for Qt.
Copyright (C) 2000 Ming-Che Chuang Copyright (C) 2002 James Su, Turbolinux Inc. Copyright (C) 2002 Anthony Fok, ThizLinux Laboratory Ltd.
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.
Reimplementado de QTextCodec.
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.
Implementa QTextCodec.
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.
| int QBig5Codec::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.
| int QBig5Codec::heuristicNameMatch | ( | const char * | hint | ) | const [virtual] |
Reimplementado de QTextCodec.
| QTextDecoder* QBig5Codec::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.
| QTextDecoder * QBig5Codec::makeDecoder | ( | ) | const [virtual] |
Reimplementado de QTextCodec.
| virtual int QBig5Codec::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.
| int QBig5Codec::mibEnum | ( | ) | const [virtual] |
Implementa QTextCodec.
| const char* QBig5Codec::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.
| const char * QBig5Codec::name | ( | ) | const [virtual] |
Implementa QTextCodec.
Reimplementado de QTextCodec.
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.
1.7.4
