Aegisub/libaegisub/common/cajun/writer.cpp

125 lines
2.7 KiB
C++

/**********************************************
License: BSD
Project Webpage: http://cajun-jsonapi.sourceforge.net/
Author: Terry Caton
***********************************************/
#include "libaegisub/cajun/writer.h"
#include <cmath>
#include <iomanip>
/*
TODO:
* better documentation
* unicode character encoding
*/
namespace json {
Writer::Writer(std::ostream& ostr) : m_ostr(ostr) { }
void Writer::Write(Array const& array) {
if (array.empty())
m_ostr << "[]";
else {
m_ostr << '[' << std::endl;
++tab_depth;
Array::const_iterator it(array.begin()), itend(array.end());
while (it != itend) {
m_ostr << std::string(tab_depth, '\t');
Write(*it);
if (++it != itend)
m_ostr << ',';
m_ostr << std::endl;
}
--tab_depth;
m_ostr << std::string(tab_depth, '\t') << ']';
}
}
void Writer::Write(Object const& object) {
if (object.empty())
m_ostr << "{}";
else {
m_ostr << '{' << std::endl;
++tab_depth;
Object::const_iterator it(object.begin()), itend(object.end());
while (it != itend) {
m_ostr << std::string(tab_depth, '\t');
Write(it->first);
m_ostr << " : ";
Write(it->second);
if (++it != itend)
m_ostr << ',';
m_ostr << std::endl;
}
--tab_depth;
m_ostr << std::string(tab_depth, '\t') << '}';
}
}
void Writer::Write(Double const& numberElement) {
m_ostr << std::setprecision(20) << numberElement;
double unused;
if (!std::modf(numberElement, &unused))
m_ostr << ".0";
}
void Writer::Write(Integer const& numberElement) {
m_ostr << numberElement;
}
void Writer::Write(Boolean const& booleanElement) {
m_ostr << (booleanElement ? "true" : "false");
}
void Writer::Write(String const& stringElement) {
m_ostr << '"';
std::string::const_iterator it(stringElement.begin()), itend(stringElement.end());
for (; it != itend; ++it) {
switch (*it) {
case '"': m_ostr << "\\\""; break;
case '\\': m_ostr << "\\\\"; break;
case '\b': m_ostr << "\\b"; break;
case '\f': m_ostr << "\\f"; break;
case '\n': m_ostr << "\\n"; break;
case '\r': m_ostr << "\\r"; break;
case '\t': m_ostr << "\\t"; break;
default: m_ostr << *it; break;
}
}
m_ostr << '"';
}
void Writer::Write(Null const&) {
m_ostr << "null";
}
void Writer::Write(UnknownElement const& unknown) {
unknown.Accept(*this);
}
void Writer::Visit(Array const& array) { Write(array); }
void Writer::Visit(Object const& object) { Write(object); }
void Writer::Visit(Integer const& integer) { Write(integer); }
void Writer::Visit(Double const& dbl) { Write(dbl); }
void Writer::Visit(String const& string) { Write(string); }
void Writer::Visit(Boolean const& boolean) { Write(boolean); }
void Writer::Visit(Null const& null) { Write(null); }
} // end namespace