94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
#include "simdjson/jsonioutil.h"
|
|
#include "simdjson/jsonparser.h"
|
|
#include <iostream>
|
|
|
|
void compute_dump(simdjson::ParsedJson::Iterator &pjh) {
|
|
if (pjh.is_object()) {
|
|
std::cout << "{";
|
|
if (pjh.down()) {
|
|
pjh.print(std::cout); // must be a string
|
|
std::cout << ":";
|
|
pjh.next();
|
|
compute_dump(pjh); // let us recurse
|
|
while (pjh.next()) {
|
|
std::cout << ",";
|
|
pjh.print(std::cout);
|
|
std::cout << ":";
|
|
pjh.next();
|
|
compute_dump(pjh); // let us recurse
|
|
}
|
|
pjh.up();
|
|
}
|
|
std::cout << "}";
|
|
} else if (pjh.is_array()) {
|
|
std::cout << "[";
|
|
if (pjh.down()) {
|
|
compute_dump(pjh); // let us recurse
|
|
while (pjh.next()) {
|
|
std::cout << ",";
|
|
compute_dump(pjh); // let us recurse
|
|
}
|
|
pjh.up();
|
|
}
|
|
std::cout << "]";
|
|
} else {
|
|
pjh.print(std::cout); // just print the lone value
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
if (argc < 3) {
|
|
std::cerr << "Usage: " << argv[0] << " <jsonfile> <jsonpath>" << std::endl;
|
|
std::cerr << "Follows the rfc6901 standard's syntax: "
|
|
"https://tools.ietf.org/html/rfc6901"
|
|
<< std::endl;
|
|
std::cerr << " Example: " << argv[0]
|
|
<< " jsonexamples/small/demo.json /Image/Width /Image/Height "
|
|
"/Image/IDs/2 "
|
|
<< std::endl;
|
|
std::cerr << "Multiple <jsonpath> can be issued in the same command, but "
|
|
"at least one is needed."
|
|
<< std::endl;
|
|
exit(1);
|
|
}
|
|
const char *filename = argv[1];
|
|
simdjson::padded_string p;
|
|
try {
|
|
simdjson::get_corpus(filename).swap(p);
|
|
} catch (const std::exception &e) { // caught by reference to base
|
|
std::cout << "Could not load the file " << filename << std::endl;
|
|
return EXIT_FAILURE;
|
|
}
|
|
simdjson::ParsedJson pj;
|
|
bool allocok = pj.allocate_capacity(p.size(), 1024);
|
|
if (!allocok) {
|
|
std::cerr << "failed to allocate memory" << std::endl;
|
|
return EXIT_FAILURE;
|
|
}
|
|
int res =
|
|
simdjson::json_parse(p, pj); // do the parsing, return false on error
|
|
if (res) {
|
|
std::cerr << " Parsing failed with error " << simdjson::error_message(res)
|
|
<< std::endl;
|
|
return EXIT_FAILURE;
|
|
}
|
|
std::cout << "[" << std::endl;
|
|
for (int idx = 2; idx < argc; idx++) {
|
|
const char *jsonpath = argv[idx];
|
|
simdjson::ParsedJson::Iterator it(pj);
|
|
if (it.move_to(std::string(jsonpath))) {
|
|
std::cout << "{\"jsonpath\": \"" << jsonpath << "\"," << std::endl;
|
|
std::cout << "\"value\":";
|
|
compute_dump(it);
|
|
std::cout << "}" << std::endl;
|
|
} else {
|
|
std::cout << "null" << std::endl;
|
|
}
|
|
if (idx + 1 < argc) {
|
|
std::cout << "," << std::endl;
|
|
}
|
|
}
|
|
std::cout << "]" << std::endl;
|
|
return EXIT_SUCCESS;
|
|
}
|