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Diffstat (limited to 'tools/runonphone/symbianutils/json.cpp')
| -rw-r--r-- | tools/runonphone/symbianutils/json.cpp | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/tools/runonphone/symbianutils/json.cpp b/tools/runonphone/symbianutils/json.cpp new file mode 100644 index 0000000..2d58824 --- /dev/null +++ b/tools/runonphone/symbianutils/json.cpp @@ -0,0 +1,490 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the tools applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "json.h" + +#ifdef TODO_USE_CREATOR +#include <utils/qtcassert.h> +#endif // TODO_USE_CREATOR + +#include <QtCore/QByteArray> +#include <QtCore/QTextStream> +#include <QtCore/QDebug> +#include <QtCore/QStringList> + +#include <ctype.h> + +//#define DEBUG_JASON +#ifdef DEBUG_JASON +#define JDEBUG(s) qDebug() << s +#else +#define JDEBUG(s) +#endif + +namespace tcftrk { + +static void skipSpaces(const char *&from, const char *to) +{ + while (from != to && isspace(*from)) + ++from; +} + +QTextStream &operator<<(QTextStream &os, const JsonValue &mi) +{ + return os << mi.toString(); +} + +void JsonValue::parsePair(const char *&from, const char *to) +{ + skipSpaces(from, to); + JDEBUG("parsePair: " << QByteArray(from, to - from)); + m_name = parseCString(from, to); + skipSpaces(from, to); + while (from < to && *from != ':') { + JDEBUG("not a colon" << *from); + ++from; + } + ++from; + parseValue(from, to); + skipSpaces(from, to); +} + +QByteArray JsonValue::parseNumber(const char *&from, const char *to) +{ + QByteArray result; + if (from < to && *from == '-') // Leading '-'. + result.append(*from++); + while (from < to && *from >= '0' && *from <= '9') + result.append(*from++); + return result; +} + +QByteArray JsonValue::parseCString(const char *&from, const char *to) +{ + QByteArray result; + JDEBUG("parseCString: " << QByteArray(from, to - from)); + if (*from != '"') { + qDebug() << "JSON Parse Error, double quote expected"; + ++from; // So we don't hang + return QByteArray(); + } + const char *ptr = from; + ++ptr; + while (ptr < to) { + if (*ptr == '"') { + ++ptr; + result = QByteArray(from + 1, ptr - from - 2); + break; + } + if (*ptr == '\\') { + ++ptr; + if (ptr == to) { + qDebug() << "JSON Parse Error, unterminated backslash escape"; + from = ptr; // So we don't hang + return QByteArray(); + } + } + ++ptr; + } + from = ptr; + + int idx = result.indexOf('\\'); + if (idx >= 0) { + char *dst = result.data() + idx; + const char *src = dst + 1, *end = result.data() + result.length(); + do { + char c = *src++; + switch (c) { + case 'a': *dst++ = '\a'; break; + case 'b': *dst++ = '\b'; break; + case 'f': *dst++ = '\f'; break; + case 'n': *dst++ = '\n'; break; + case 'r': *dst++ = '\r'; break; + case 't': *dst++ = '\t'; break; + case 'v': *dst++ = '\v'; break; + case '"': *dst++ = '"'; break; + case '\\': *dst++ = '\\'; break; + default: + { + int chars = 0; + uchar prod = 0; + forever { + if (c < '0' || c > '7') { + --src; + break; + } + prod = prod * 8 + c - '0'; + if (++chars == 3 || src == end) + break; + c = *src++; + } + if (!chars) { + qDebug() << "JSON Parse Error, unrecognized backslash escape"; + return QByteArray(); + } + *dst++ = prod; + } + } + while (src != end) { + char c = *src++; + if (c == '\\') + break; + *dst++ = c; + } + } while (src != end); + *dst = 0; + result.truncate(dst - result.data()); + } + + JDEBUG("parseCString, got " << result); + return result; +} + + + +void JsonValue::parseValue(const char *&from, const char *to) +{ + JDEBUG("parseValue: " << QByteArray(from, to - from)); + switch (*from) { + case '{': + parseObject(from, to); + break; + case 't': + if (to - from >= 4 && qstrncmp(from, "true", 4) == 0) { + m_data = QByteArray(from, 4); + from += m_data.size(); + m_type = Boolean; + } + break; + case 'f': + if (to - from >= 5 && qstrncmp(from, "false", 5) == 0) { + m_data = QByteArray(from, 5); + from += m_data.size(); + m_type = Boolean; + } + break; + case 'n': + if (to - from >= 4 && qstrncmp(from, "null", 4) == 0) { + m_data = QByteArray(from, 4); + from += m_data.size(); + m_type = NullObject; + } + break; + case '[': + parseArray(from, to); + break; + case '"': + m_type = String; + m_data = parseCString(from, to); + break; + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + case '-': + m_type = Number; + m_data = parseNumber(from, to); + default: + break; + } +} + +void JsonValue::parseObject(const char *&from, const char *to) +{ + JDEBUG("parseObject: " << QByteArray(from, to - from)); +#ifdef TODO_USE_CREATOR + QTC_ASSERT(*from == '{', /**/); +#endif + ++from; + m_type = Object; + while (from < to) { + if (*from == '}') { + ++from; + break; + } + JsonValue child; + child.parsePair(from, to); + if (!child.isValid()) + return; + m_children += child; + if (*from == ',') + ++from; + } +} + +void JsonValue::parseArray(const char *&from, const char *to) +{ + JDEBUG("parseArray: " << QByteArray(from, to - from)); +#ifdef TODO_USE_CREATOR + QTC_ASSERT(*from == '[', /**/); +#endif + ++from; + m_type = Array; + while (from < to) { + if (*from == ']') { + ++from; + break; + } + JsonValue child; + child.parseValue(from, to); + if (child.isValid()) + m_children += child; + if (*from == ',') + ++from; + } +} + +void JsonValue::setStreamOutput(const QByteArray &name, const QByteArray &content) +{ + if (content.isEmpty()) + return; + JsonValue child; + child.m_type = String; + child.m_name = name; + child.m_data = content; + m_children += child; + if (m_type == Invalid) + m_type = Object; +} + +static QByteArray ind(int indent) +{ + return QByteArray(2 * indent, ' '); +} + +void JsonValue::dumpChildren(QByteArray * str, bool multiline, int indent) const +{ + for (int i = 0; i < m_children.size(); ++i) { + if (i != 0) { + *str += ','; + if (multiline) + *str += '\n'; + } + if (multiline) + *str += ind(indent); + *str += m_children.at(i).toString(multiline, indent); + } +} + +class MyString : public QString { +public: + ushort at(int i) const { return constData()[i].unicode(); } +}; + +template<class ST, typename CT> +inline ST escapeCStringTpl(const ST &ba) +{ + ST ret; + ret.reserve(ba.length() * 2); + for (int i = 0; i < ba.length(); ++i) { + CT c = ba.at(i); + switch (c) { + case '\\': ret += "\\\\"; break; + case '\a': ret += "\\a"; break; + case '\b': ret += "\\b"; break; + case '\f': ret += "\\f"; break; + case '\n': ret += "\\n"; break; + case '\r': ret += "\\r"; break; + case '\t': ret += "\\t"; break; + case '\v': ret += "\\v"; break; + case '"': ret += "\\\""; break; + default: + if (c < 32 || c == 127) { + ret += '\\'; + ret += '0' + (c >> 6); + ret += '0' + ((c >> 3) & 7); + ret += '0' + (c & 7); + } else { + ret += c; + } + } + } + return ret; +} + +QString JsonValue::escapeCString(const QString &ba) +{ + return escapeCStringTpl<MyString, ushort>(static_cast<const MyString &>(ba)); +} + +QByteArray JsonValue::escapeCString(const QByteArray &ba) +{ + return escapeCStringTpl<QByteArray, uchar>(ba); +} + +QByteArray JsonValue::toString(bool multiline, int indent) const +{ + QByteArray result; + switch (m_type) { + case Invalid: + if (multiline) + result += ind(indent) + "Invalid\n"; + else + result += "Invalid"; + break; + case String: + if (!m_name.isEmpty()) + result += m_name + "="; + result += '"' + escapeCString(m_data) + '"'; + break; + case Number: + if (!m_name.isEmpty()) + result += '"' + m_name + "\":"; + result += m_data; + break; + case Boolean: + case NullObject: + if (!m_name.isEmpty()) + result += '"' + m_name + "\":"; + result += m_data; + break; + case Object: + if (!m_name.isEmpty()) + result += m_name + '='; + if (multiline) { + result += "{\n"; + dumpChildren(&result, multiline, indent + 1); + result += '\n' + ind(indent) + "}"; + } else { + result += "{"; + dumpChildren(&result, multiline, indent + 1); + result += "}"; + } + break; + case Array: + if (!m_name.isEmpty()) + result += m_name + "="; + if (multiline) { + result += "[\n"; + dumpChildren(&result, multiline, indent + 1); + result += '\n' + ind(indent) + "]"; + } else { + result += "["; + dumpChildren(&result, multiline, indent + 1); + result += "]"; + } + break; + } + return result; +} + +void JsonValue::fromString(const QByteArray &ba) +{ + const char *from = ba.constBegin(); + const char *to = ba.constEnd(); + parseValue(from, to); +} + +JsonValue JsonValue::findChild(const char *name) const +{ + for (int i = 0; i < m_children.size(); ++i) + if (m_children.at(i).m_name == name) + return m_children.at(i); + return JsonValue(); +} + +void JsonInputStream::appendCString(const char *s) +{ + m_target.append('"'); + for (const char *p = s; *p; p++) { + if (*p == '"' || *p == '\\') + m_target.append('\\'); + m_target.append(*p); + } + m_target.append('"'); +} + +void JsonInputStream::appendString(const QString &in) +{ + if (in.isEmpty()) { + m_target.append("\"\""); + return; + } + + const QChar doubleQuote('"'); + const QChar backSlash('\\'); + QString rc; + const int inSize = in.size(); + rc.reserve(in.size() + 5); + rc.append(doubleQuote); + for (int i = 0; i < inSize; i++) { + const QChar c = in.at(i); + if (c == doubleQuote || c == backSlash) + rc.append(backSlash); + rc.append(c); + } + rc.append(doubleQuote); + m_target.append(rc.toUtf8()); + return; +} + +JsonInputStream &JsonInputStream::operator<<(const QStringList &in) +{ + m_target.append('['); + const int count = in.size(); + for (int i = 0 ; i < count; i++) { + if (i) + m_target.append(','); + appendString(in.at(i)); + } + m_target.append(']'); + return *this; +} + +JsonInputStream &JsonInputStream::operator<<(const QVector<QByteArray> &ba) +{ + m_target.append('['); + const int count = ba.size(); + for (int i = 0 ; i < count; i++) { + if (i) + m_target.append(','); + appendCString(ba.at(i).constData()); + } + m_target.append(']'); + return *this; +} + +JsonInputStream &JsonInputStream::operator<<(bool b) +{ + m_target.append(b ? "true" : "false"); + return *this; +} + +} // namespace tcftrk + |