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-rw-r--r--src/corelib/json/qjsonwriter.cpp280
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diff --git a/src/corelib/json/qjsonwriter.cpp b/src/corelib/json/qjsonwriter.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qjsonwriter_p.h"
+#include "qjson_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QJsonPrivate;
+
+static void objectContentToJson(const QJsonPrivate::Object *o, QByteArray &json, int indent, bool compact);
+static void arrayContentToJson(const QJsonPrivate::Array *a, QByteArray &json, int indent, bool compact);
+
+// some code from qutfcodec.cpp, inlined here for performance reasons
+// to allow fast escaping of strings
+static inline bool isUnicodeNonCharacter(uint ucs4)
+{
+ // Unicode has a couple of "non-characters" that one can use internally,
+ // but are not allowed to be used for text interchange.
+ //
+ // Those are the last two entries each Unicode Plane (U+FFFE, U+FFFF,
+ // U+1FFFE, U+1FFFF, etc.) as well as the entries between U+FDD0 and
+ // U+FDEF (inclusive)
+
+ return (ucs4 & 0xfffe) == 0xfffe
+ || (ucs4 - 0xfdd0U) < 16;
+}
+
+static inline uchar hexdig(uint u)
+{
+ return (u < 0xa ? '0' + u : 'a' + u - 0xa);
+}
+
+static QByteArray escapedString(const QString &s)
+{
+ const uchar replacement = '?';
+ QByteArray ba(s.length(), Qt::Uninitialized);
+
+ uchar *cursor = (uchar *)ba.data();
+ const uchar *ba_end = cursor + ba.length();
+
+ const QChar *ch = (const QChar *)s.constData();
+ const QChar *end = ch + s.length();
+
+ int surrogate_high = -1;
+
+ while (ch < end) {
+ if (cursor >= ba_end - 6) {
+ // ensure we have enough space
+ int pos = cursor - (const uchar *)ba.constData();
+ ba.resize(ba.size()*2);
+ cursor = (uchar *)ba.data() + pos;
+ ba_end = (const uchar *)ba.constData() + ba.length();
+ }
+
+ uint u = ch->unicode();
+ if (surrogate_high >= 0) {
+ if (ch->isLowSurrogate()) {
+ u = QChar::surrogateToUcs4(surrogate_high, u);
+ surrogate_high = -1;
+ } else {
+ // high surrogate without low
+ *cursor = replacement;
+ ++ch;
+ surrogate_high = -1;
+ continue;
+ }
+ } else if (ch->isLowSurrogate()) {
+ // low surrogate without high
+ *cursor = replacement;
+ ++ch;
+ continue;
+ } else if (ch->isHighSurrogate()) {
+ surrogate_high = u;
+ ++ch;
+ continue;
+ }
+
+ if (u < 0x80) {
+ if (u < 0x20 || u == 0x22 || u == 0x5c) {
+ *cursor++ = '\\';
+ switch (u) {
+ case 0x22:
+ *cursor++ = '"';
+ break;
+ case 0x5c:
+ *cursor++ = '\\';
+ break;
+ case 0x8:
+ *cursor++ = 'b';
+ break;
+ case 0xc:
+ *cursor++ = 'f';
+ break;
+ case 0xa:
+ *cursor++ = 'n';
+ break;
+ case 0xd:
+ *cursor++ = 'r';
+ break;
+ case 0x9:
+ *cursor++ = 't';
+ break;
+ default:
+ *cursor++ = 'u';
+ *cursor++ = '0';
+ *cursor++ = '0';
+ *cursor++ = hexdig(u>>4);
+ *cursor++ = hexdig(u & 0xf);
+ }
+ } else {
+ *cursor++ = (uchar)u;
+ }
+ } else {
+ if (u < 0x0800) {
+ *cursor++ = 0xc0 | ((uchar) (u >> 6));
+ } else {
+ // is it one of the Unicode non-characters?
+ if (isUnicodeNonCharacter(u)) {
+ *cursor++ = replacement;
+ ++ch;
+ continue;
+ }
+
+ if (u > 0xffff) {
+ *cursor++ = 0xf0 | ((uchar) (u >> 18));
+ *cursor++ = 0x80 | (((uchar) (u >> 12)) & 0x3f);
+ } else {
+ *cursor++ = 0xe0 | (((uchar) (u >> 12)) & 0x3f);
+ }
+ *cursor++ = 0x80 | (((uchar) (u >> 6)) & 0x3f);
+ }
+ *cursor++ = 0x80 | ((uchar) (u&0x3f));
+ }
+ ++ch;
+ }
+
+ ba.resize(cursor - (const uchar *)ba.constData());
+ return ba;
+}
+
+static void valueToJson(const QJsonPrivate::Base *b, const QJsonPrivate::Value &v, QByteArray &json, int indent, bool compact)
+{
+ QJsonValue::Type type = (QJsonValue::Type)(uint)v.type;
+ switch (type) {
+ case QJsonValue::Bool:
+ json += v.toBoolean() ? "true" : "false";
+ break;
+ case QJsonValue::Double:
+ json += QByteArray::number(v.toDouble(b));
+ break;
+ case QJsonValue::String:
+ json += '"';
+ json += escapedString(v.toString(b));
+ json += '"';
+ break;
+ case QJsonValue::Array:
+ json += compact ? "[" : "[\n";
+ arrayContentToJson(static_cast<QJsonPrivate::Array *>(v.base(b)), json, indent + (compact ? 0 : 1), compact);
+ json += QByteArray(4*indent, ' ');
+ json += "]";
+ break;
+ case QJsonValue::Object:
+ json += compact ? "{" : "{\n";
+ objectContentToJson(static_cast<QJsonPrivate::Object *>(v.base(b)), json, indent + (compact ? 0 : 1), compact);
+ json += QByteArray(4*indent, ' ');
+ json += "}";
+ break;
+ case QJsonValue::Null:
+ default:
+ json += "null";
+ }
+}
+
+static void arrayContentToJson(const QJsonPrivate::Array *a, QByteArray &json, int indent, bool compact)
+{
+ if (!a || !a->length)
+ return;
+
+ QByteArray indentString(4*indent, ' ');
+
+ uint i = 0;
+ while (1) {
+ json += indentString;
+ valueToJson(a, a->at(i), json, indent, compact);
+
+ if (++i == a->length) {
+ if (!compact)
+ json += '\n';
+ break;
+ }
+
+ json += compact ? "," : ",\n";
+ }
+}
+
+
+static void objectContentToJson(const QJsonPrivate::Object *o, QByteArray &json, int indent, bool compact)
+{
+ if (!o || !o->length)
+ return;
+
+ QByteArray indentString(4*indent, ' ');
+
+ uint i = 0;
+ while (1) {
+ QJsonPrivate::Entry *e = o->entryAt(i);
+ json += indentString;
+ json += '"';
+ json += escapedString(e->key());
+ json += "\": ";
+ valueToJson(o, e->value, json, indent, compact);
+
+ if (++i == o->length) {
+ if (!compact)
+ json += '\n';
+ break;
+ }
+
+ json += compact ? "," : ",\n";
+ }
+}
+
+void Writer::objectToJson(const QJsonPrivate::Object *o, QByteArray &json, int indent, bool compact)
+{
+ json.reserve(json.size() + (o ? o->size : 16));
+ json += compact ? "{" : "{\n";
+ objectContentToJson(o, json, indent + (compact ? 0 : 1), compact);
+ json += QByteArray(4*indent, ' ');
+ json += compact ? "}" : "}\n";
+}
+
+void Writer::arrayToJson(const QJsonPrivate::Array *a, QByteArray &json, int indent, bool compact)
+{
+ json.reserve(json.size() + (a ? a->size : 16));
+ json += compact ? "[" : "[\n";
+ arrayContentToJson(a, json, indent + (compact ? 0 : 1), compact);
+ json += QByteArray(4*indent, ' ');
+ json += compact ? "]" : "]\n";
+}
+
+QT_END_NAMESPACE
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