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json2bson.cxx
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json2bson.cxx
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#include <stdlib.h>
#include "cJSON_BSON.h"
#include <fstream>
#include <iostream>
int usage(int argc, char* argv[], const char* msg, int status)
{
std::cerr
<< "\nUsage\n"
<< "=====\n\n"
<< " " << (argc > 0 ? argv[0] : "json2bson") << " input.json output.bson\n"
<< "\n";
if (msg)
std::cerr
<< "\nStatus\n"
<< "======\n\n"
<< msg << "\n\n";
return status;
}
int main(int argc, char* argv[])
{
if (argc < 3)
return usage(argc, argv, "Please specify input and output filenames.", 1);
std::ifstream file(argv[1]);
if (!file.good())
return usage(argc, argv, "Could not open input file.", 3);
std::string data(
(std::istreambuf_iterator<char>(file)),
(std::istreambuf_iterator<char>()));
cJSON* node = cJSON_Parse(data.c_str());
if (!node)
return usage(argc, argv, "Could parse input file.", 5);
// Ask for UUID strings to be serialized as binary UUIDs:
cJSON_BSON_SetDetectUUIDs(1);
size_t sz; // will hold returned size of buf
char* buf = cJSON_PrintBSON(node, &sz);
cJSON_Delete(node);
FILE* fid = fopen(argv[2], "wb");
if (!fid)
return usage(argc, argv, "Could not open output file.", 7);
fwrite(buf, sz, 1, fid);
fclose(fid);
free(buf);
return 0;
}