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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
/*
* JSON writing functions.
*/
#pragma once
#include <stddef.h>
#include <wchar.h>
#include <cmath> // for std::isinf, std::isnan; as C99 macros are unavailable in C++11
#include <iomanip>
#include <limits>
#include <ostream>
#include <string>
class JSONWriter
{
private:
std::ostream &os;
int level;
bool value;
char space;
void
newline(void);
void
separator(void);
public:
JSONWriter(std::ostream &_os);
~JSONWriter();
void
beginObject();
void
endObject();
void
beginMember(const char * name);
inline void
beginMember(const std::string &name) {
beginMember(name.c_str());
}
void
endMember(void);
void
beginArray();
void
endArray(void);
void
writeString(const char *s);
inline void
writeString(const std::string &s) {
writeString(s.c_str());
}
void
writeBase64(const void *bytes, size_t size);
void
writeNull(void);
void
writeBool(bool b);
/**
* Special case for char to prevent it to be written as a literal
* character.
*/
inline void
writeInt(signed char n) {
separator();
os << std::dec << static_cast<int>(n);
value = true;
space = ' ';
}
inline void
writeInt(unsigned char n) {
separator();
os << std::dec << static_cast<unsigned>(n);
value = true;
space = ' ';
}
template<class T>
inline void
writeInt(T n) {
separator();
os << std::dec << n;
value = true;
space = ' ';
}
template<class T>
void
writeFloat(T n) {
separator();
if (std::isnan(n)) {
// NaN is non-standard but widely supported
os << "NaN";
} else if (std::isinf(n)) {
// Infinite is non-standard but widely supported
if (n < 0) {
os << '-';
}
os << "Infinity";
} else {
os << std::dec << std::setprecision(std::numeric_limits<T>::digits10 + 1) << n;
}
value = true;
space = ' ';
}
};
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