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// Copyright (C) 2016 The Qt Company Ltd.
// Copyright (C) 2016 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <cmath>
#include <qlocale.h>
#include "qjsonwriter_p.h"
#include "qjson_p.h"
#include "private/qstringconverter_p.h"
#include <private/qnumeric_p.h>
#include <private/qcborvalue_p.h>
QT_BEGIN_NAMESPACE
using namespace QJsonPrivate;
static void objectContentToJson(const QCborContainerPrivate *o, QByteArray &json, int indent, bool compact);
static void arrayContentToJson(const QCborContainerPrivate *a, QByteArray &json, int indent, bool compact);
static inline uchar hexdig(uint u)
{
return (u < 0xa ? '0' + u : 'a' + u - 0xa);
}
static QByteArray escapedString(QStringView s)
{
// give it a minimum size to ensure the resize() below always adds enough space
QByteArray ba(qMax(s.size(), 16), Qt::Uninitialized);
auto ba_const_start = [&]() { return reinterpret_cast<const uchar *>(ba.constData()); };
uchar *cursor = reinterpret_cast<uchar *>(const_cast<char *>(ba.constData()));
const uchar *ba_end = cursor + ba.size();
const char16_t *src = s.utf16();
const char16_t *const end = s.utf16() + s.size();
while (src != end) {
if (cursor >= ba_end - 6) {
// ensure we have enough space
qptrdiff pos = cursor - ba_const_start();
ba.resize(ba.size()*2);
cursor = reinterpret_cast<uchar *>(ba.data()) + pos;
ba_end = ba_const_start() + ba.size();
}
char16_t u = *src++;
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 (QUtf8Functions::toUtf8<QUtf8BaseTraits>(u, cursor, src, end) < 0) {
// failed to get valid utf8 use JSON escape sequence
*cursor++ = '\\';
*cursor++ = 'u';
*cursor++ = hexdig(u>>12 & 0x0f);
*cursor++ = hexdig(u>>8 & 0x0f);
*cursor++ = hexdig(u>>4 & 0x0f);
*cursor++ = hexdig(u & 0x0f);
}
}
ba.resize(cursor - ba_const_start());
return ba;
}
static void valueToJson(const QCborValue &v, QByteArray &json, int indent, bool compact)
{
QCborValue::Type type = v.type();
switch (type) {
case QCborValue::True:
json += "true";
break;
case QCborValue::False:
json += "false";
break;
case QCborValue::Integer:
json += QByteArray::number(v.toInteger());
break;
case QCborValue::Double: {
const double d = v.toDouble();
if (qt_is_finite(d))
json += QByteArray::number(d, 'g', QLocale::FloatingPointShortest);
else
json += "null"; // +INF || -INF || NaN (see RFC4627#section2.4)
break;
}
case QCborValue::String:
json += '"';
json += escapedString(v.toString());
json += '"';
break;
case QCborValue::Array:
json += compact ? "[" : "[\n";
arrayContentToJson(
QJsonPrivate::Value::container(v), json, indent + (compact ? 0 : 1), compact);
json += QByteArray(4*indent, ' ');
json += ']';
break;
case QCborValue::Map:
json += compact ? "{" : "{\n";
objectContentToJson(
QJsonPrivate::Value::container(v), json, indent + (compact ? 0 : 1), compact);
json += QByteArray(4*indent, ' ');
json += '}';
break;
case QCborValue::Null:
default:
json += "null";
}
}
static void arrayContentToJson(const QCborContainerPrivate *a, QByteArray &json, int indent, bool compact)
{
if (!a || a->elements.empty())
return;
QByteArray indentString(4*indent, ' ');
qsizetype i = 0;
while (true) {
json += indentString;
valueToJson(a->valueAt(i), json, indent, compact);
if (++i == a->elements.size()) {
if (!compact)
json += '\n';
break;
}
json += compact ? "," : ",\n";
}
}
static void objectContentToJson(const QCborContainerPrivate *o, QByteArray &json, int indent, bool compact)
{
if (!o || o->elements.empty())
return;
QByteArray indentString(4*indent, ' ');
qsizetype i = 0;
while (true) {
QCborValue e = o->valueAt(i);
json += indentString;
json += '"';
json += escapedString(o->valueAt(i).toString());
json += compact ? "\":" : "\": ";
valueToJson(o->valueAt(i + 1), json, indent, compact);
if ((i += 2) == o->elements.size()) {
if (!compact)
json += '\n';
break;
}
json += compact ? "," : ",\n";
}
}
void Writer::objectToJson(const QCborContainerPrivate *o, QByteArray &json, int indent, bool compact)
{
json.reserve(json.size() + (o ? (int)o->elements.size() : 16));
json += compact ? "{" : "{\n";
objectContentToJson(o, json, indent + (compact ? 0 : 1), compact);
json += QByteArray(4*indent, ' ');
json += compact ? "}" : "}\n";
}
void Writer::arrayToJson(const QCborContainerPrivate *a, QByteArray &json, int indent, bool compact)
{
json.reserve(json.size() + (a ? (int)a->elements.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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