| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| 11 | **
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| 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| 25 | **
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| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include "bencodeparser.h"
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| 42 |
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| 43 | #include <QList>
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| 44 | #include <QMetaType>
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| 45 |
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| 46 | BencodeParser::BencodeParser()
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| 47 | {
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| 48 | }
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| 49 |
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| 50 | bool BencodeParser::parse(const QByteArray &content)
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| 51 | {
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| 52 | if (content.isEmpty()) {
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| 53 | errString = QString("No content");
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| 54 | return false;
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| 55 | }
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| 56 |
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| 57 | this->content = content;
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| 58 | index = 0;
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| 59 | infoStart = 0;
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| 60 | infoLength = 0;
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| 61 | return getDictionary(&dictionaryValue);
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| 62 | }
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| 63 |
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| 64 | QString BencodeParser::errorString() const
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| 65 | {
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| 66 | return errString;
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| 67 | }
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| 68 |
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| 69 | QMap<QByteArray, QVariant> BencodeParser::dictionary() const
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| 70 | {
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| 71 | return dictionaryValue;
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| 72 | }
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| 73 |
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| 74 | QByteArray BencodeParser::infoSection() const
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| 75 | {
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| 76 | return content.mid(infoStart, infoLength);
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| 77 | }
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| 78 |
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| 79 | bool BencodeParser::getByteString(QByteArray *byteString)
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| 80 | {
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| 81 | const int contentSize = content.size();
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| 82 | int size = -1;
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| 83 | do {
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| 84 | char c = content.at(index);
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| 85 | if (c < '0' || c > '9') {
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| 86 | if (size == -1)
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| 87 | return false;
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| 88 | if (c != ':') {
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| 89 | errString = QString("Unexpected character at pos %1: %2")
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| 90 | .arg(index).arg(c);
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| 91 | return false;
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| 92 | }
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| 93 | ++index;
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| 94 | break;
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| 95 | }
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| 96 | if (size == -1)
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| 97 | size = 0;
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| 98 | size *= 10;
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| 99 | size += c - '0';
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| 100 | } while (++index < contentSize);
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| 101 |
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| 102 | if (byteString)
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| 103 | *byteString = content.mid(index, size);
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| 104 | index += size;
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| 105 | return true;
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| 106 | }
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| 107 |
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| 108 | bool BencodeParser::getInteger(qint64 *integer)
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| 109 | {
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| 110 | const int contentSize = content.size();
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| 111 | if (content.at(index) != 'i')
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| 112 | return false;
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| 113 |
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| 114 | ++index;
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| 115 | qint64 num = -1;
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| 116 | bool negative = false;
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| 117 |
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| 118 | do {
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| 119 | char c = content.at(index);
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| 120 | if (c < '0' || c > '9') {
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| 121 | if (num == -1) {
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| 122 | if (c != '-' || negative)
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| 123 | return false;
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| 124 | negative = true;
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| 125 | continue;
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| 126 | } else {
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| 127 | if (c != 'e') {
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| 128 | errString = QString("Unexpected character at pos %1: %2")
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| 129 | .arg(index).arg(c);
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| 130 | return false;
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| 131 | }
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| 132 | ++index;
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| 133 | break;
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| 134 | }
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| 135 | }
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| 136 | if (num == -1)
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| 137 | num = 0;
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| 138 | num *= 10;
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| 139 | num += c - '0';
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| 140 | } while (++index < contentSize);
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| 141 |
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| 142 | if (integer)
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| 143 | *integer = negative ? -num : num;
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| 144 | return true;
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| 145 | }
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| 146 |
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| 147 | bool BencodeParser::getList(QList<QVariant> *list)
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