1 /* Encode a message using oneof fields */
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <pb_encode.h>
6 #include "oneof.pb.h"
7 #include "test_helpers.h"
8
main(int argc,char ** argv)9 int main(int argc, char **argv)
10 {
11 uint8_t buffer[OneOfMessage_size];
12 OneOfMessage msg = OneOfMessage_init_zero;
13 pb_ostream_t stream;
14 int option;
15
16 if (argc != 2)
17 {
18 fprintf(stderr, "Usage: encode_oneof [number]\n");
19 return 1;
20 }
21 option = atoi(argv[1]);
22
23 /* Prefix and suffix are used to test that the union does not disturb
24 * other fields in the same message. */
25 msg.prefix = 123;
26
27 /* We encode one of the 'values' fields based on command line argument */
28 if (option == 1)
29 {
30 msg.which_values = OneOfMessage_first_tag;
31 msg.values.first = 999;
32 }
33 else if (option == 2)
34 {
35 msg.which_values = OneOfMessage_second_tag;
36 strcpy(msg.values.second, "abcd");
37 }
38 else if (option == 3)
39 {
40 msg.which_values = OneOfMessage_third_tag;
41 msg.values.third.array_count = 5;
42 msg.values.third.array[0] = 1;
43 msg.values.third.array[1] = 2;
44 msg.values.third.array[2] = 3;
45 msg.values.third.array[3] = 4;
46 msg.values.third.array[4] = 5;
47 }
48
49 msg.suffix = 321;
50
51 stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
52
53 if (pb_encode(&stream, OneOfMessage_fields, &msg))
54 {
55 SET_BINARY_MODE(stdout);
56 fwrite(buffer, 1, stream.bytes_written, stdout);
57 return 0;
58 }
59 else
60 {
61 fprintf(stderr, "Encoding failed: %s\n", PB_GET_ERROR(&stream));
62 return 1;
63 }
64 }
65