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#ifndef _JSON_WRAPPER_H_
#define _JSON_WRAPPER_H_
#include <iostream>
#include <cassert>
#include "JSON_parser.h"
class JSONParser {
public:
JSONParser() {
init_JSON_config(&config);
hack.mf = &JSONParser::Callback;
config.depth = 10;
config.callback_ctx = reinterpret_cast<void*>(this);
config.callback = hack.cb;
config.allow_comments = 1;
config.handle_floats_manually = 1;
jc = new_JSON_parser(&config);
}
virtual ~JSONParser() {
delete_JSON_parser(jc);
}
bool Parse(std::istream* in) {
int count = 0;
int lc = 1;
for (; in ; ++count) {
int next_char = in->get();
if (!in->good()) break;
if (lc == '\n') { ++lc; }
if (!JSON_parser_char(jc, next_char)) {
std::cerr << "JSON_parser_char: syntax error, line " << lc << " (byte " << count << ")" << std::endl;
return false;
}
}
if (!JSON_parser_done(jc)) {
std::cerr << "JSON_parser_done: syntax error\n";
return false;
}
return true;
}
static void WriteEscapedString(const std::string& in, std::ostream* out);
protected:
virtual bool HandleJSONEvent(int type, const JSON_value* value) = 0;
private:
int Callback(int type, const JSON_value* value) {
if (HandleJSONEvent(type, value)) return 1;
return 0;
}
JSON_parser_struct* jc;
JSON_config config;
typedef int (JSONParser::* MF)(int type, const struct JSON_value_struct* value);
union CBHack {
JSON_parser_callback cb;
MF mf;
} hack;
};
#endif
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