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/*
* Copyright (c) 2014-2020 Pavel Kalvoda <me@pavelkalvoda.com>
*
* libcbor is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#include <stdlib.h>
#include "cbor.h"
void usage(void) {
printf("Usage: streaming_array <N>\n");
printf("Prints out serialized array [0, ..., N-1]\n");
exit(1);
}
#define BUFFER_SIZE 8
unsigned char buffer[BUFFER_SIZE];
FILE* out;
void flush(size_t bytes) {
if (bytes == 0) exit(1); // All items should be successfully encoded
if (fwrite(buffer, sizeof(unsigned char), bytes, out) != bytes) exit(1);
if (fflush(out)) exit(1);
}
/*
* Example of using the streaming encoding API to create an array of integers
* on the fly. Notice that a partial output is produced with every element.
*/
int main(int argc, char* argv[]) {
if (argc != 2) usage();
long n = strtol(argv[1], NULL, 10);
out = freopen(NULL, "wb", stdout);
if (!out) exit(1);
// Start an indefinite-length array
flush(cbor_encode_indef_array_start(buffer, BUFFER_SIZE));
// Write the array items one by one
for (size_t i = 0; i < n; i++) {
flush(cbor_encode_uint32(i, buffer, BUFFER_SIZE));
}
// Close the array
flush(cbor_encode_break(buffer, BUFFER_SIZE));
if (fclose(out)) exit(1);
}
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