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/*
Ousía
Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Variant.hpp"
#include "VariantWriter.hpp"
namespace ousia {
/**
* Helper function used to write a JSON string, including quotation marks.
*
* @param str is the string that should be serialized.
* @param stream is the stream to which the JSON string should be written.
*/
static void writeJsonString(const std::string str, std::ostream &stream)
{
stream << "\"";
for (char c : str) {
switch (c) {
case '\b':
stream << "\\b";
break;
case '\f':
stream << "\\f";
break;
case '\n':
stream << "\\n";
break;
case '\r':
stream << "\\r";
break;
case '\t':
stream << "\\t";
break;
case '\v':
stream << "\\v";
break;
case '\\':
stream << "\\";
break;
case '"':
stream << "\\\"";
break;
default:
stream << c;
break;
}
}
stream << "\"";
}
/**
* Helper function used to write the indentation, but only if the pretty mode
* is enabled.
*
* @param stream is the stream the result should be written to.
* @param pretty if false, no indentation is written.
*/
static void writeIndentation(std::ostream &stream, bool pretty, int level)
{
if (pretty) {
for (int i = 0; i < level; i++) {
stream << "\t";
}
}
}
/**
* Helper function used to write a linebreak, but only if the pretty mode is
* enabled.
*
* @param stream is the stream the result should be written to.
* @param pretty if false, no linebreak is written.
*/
static void writeLinebreak(std::ostream &stream, bool pretty)
{
if (pretty) {
stream << "\n";
}
}
/**
* Helper function used to serialize JSON with indentation.
*
* @param var is the variant that should be serialized.
* @param stream is the stream the result should be written to.
* @param pretty if true, the resulting value is properly indented.
* @param level is the current indentation level.
*/
static void writeJsonInternal(const Variant &var, std::ostream &stream,
bool pretty, int level)
{
switch (var.getType()) {
case VariantType::NULLPTR:
case VariantType::BOOL:
case VariantType::INT:
case VariantType::DOUBLE:
case VariantType::FUNCTION:
case VariantType::OBJECT:
stream << var.toString();
return;
case VariantType::STRING:
case VariantType::MAGIC:
writeJsonString(var.toString(), stream);
return;
case VariantType::ARRAY: {
stream << "[";
writeLinebreak(stream, pretty);
const Variant::arrayType &arr = var.asArray();
for (size_t i = 0; i < arr.size(); i++) {
writeIndentation(stream, pretty, level + 1);
writeJsonInternal(arr[i], stream, pretty, level + 1);
if (i + 1 != arr.size()) {
stream << ",";
}
writeLinebreak(stream, pretty);
}
writeIndentation(stream, pretty, level);
stream << "]";
return;
}
case VariantType::MAP: {
writeIndentation(stream, pretty, level);
stream << "{";
writeLinebreak(stream, pretty);
const Variant::mapType &map = var.asMap();
for (auto it = map.cbegin(); it != map.cend();) {
writeIndentation(stream, pretty, level + 1);
writeJsonString(it->first, stream);
stream << (pretty ? ": " : ":");
writeJsonInternal(it->second, stream, pretty, level + 1);
if ((++it) != map.cend()) {
stream << ",";
}
writeLinebreak(stream, pretty);
}
writeIndentation(stream, pretty, level);
stream << "}";
return;
}
}
}
void VariantWriter::writeJson(const Variant &var, std::ostream &stream,
bool pretty)
{
writeJsonInternal(var, stream, pretty, 0);
}
}
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