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