1/* Decoding testcase for callback fields.
2 * Run e.g. ./test_encode_callbacks | ./test_decode_callbacks
3 */
4
5#include <stdio.h>
6#include <pb_decode.h>
7#include "callbacks.pb.h"
8#include "test_helpers.h"
9
10bool print_string(pb_istream_t *stream, const pb_field_t *field, void **arg)
11{
12    uint8_t buffer[1024] = {0};
13
14    /* We could read block-by-block to avoid the large buffer... */
15    if (stream->bytes_left > sizeof(buffer) - 1)
16        return false;
17
18    if (!pb_read(stream, buffer, stream->bytes_left))
19        return false;
20
21    /* Print the string, in format comparable with protoc --decode.
22     * Format comes from the arg defined in main().
23     */
24    printf((char*)*arg, buffer);
25    return true;
26}
27
28bool print_int32(pb_istream_t *stream, const pb_field_t *field, void **arg)
29{
30    uint64_t value;
31    if (!pb_decode_varint(stream, &value))
32        return false;
33
34    printf((char*)*arg, (long)value);
35    return true;
36}
37
38bool print_fixed32(pb_istream_t *stream, const pb_field_t *field, void **arg)
39{
40    uint32_t value;
41    if (!pb_decode_fixed32(stream, &value))
42        return false;
43
44    printf((char*)*arg, (long)value);
45    return true;
46}
47
48bool print_fixed64(pb_istream_t *stream, const pb_field_t *field, void **arg)
49{
50    uint64_t value;
51    if (!pb_decode_fixed64(stream, &value))
52        return false;
53
54    printf((char*)*arg, (long)value);
55    return true;
56}
57
58int main()
59{
60    uint8_t buffer[1024];
61    size_t length;
62    pb_istream_t stream;
63    /* Note: empty initializer list initializes the struct with all-0.
64     * This is recommended so that unused callbacks are set to NULL instead
65     * of crashing at runtime.
66     */
67    TestMessage testmessage = {{{NULL}}};
68
69    SET_BINARY_MODE(stdin);
70    length = fread(buffer, 1, 1024, stdin);
71    stream = pb_istream_from_buffer(buffer, length);
72
73    testmessage.submsg.stringvalue.funcs.decode = &print_string;
74    testmessage.submsg.stringvalue.arg = "submsg {\n  stringvalue: \"%s\"\n";
75    testmessage.submsg.int32value.funcs.decode = &print_int32;
76    testmessage.submsg.int32value.arg = "  int32value: %ld\n";
77    testmessage.submsg.fixed32value.funcs.decode = &print_fixed32;
78    testmessage.submsg.fixed32value.arg = "  fixed32value: %ld\n";
79    testmessage.submsg.fixed64value.funcs.decode = &print_fixed64;
80    testmessage.submsg.fixed64value.arg = "  fixed64value: %ld\n}\n";
81
82    testmessage.stringvalue.funcs.decode = &print_string;
83    testmessage.stringvalue.arg = "stringvalue: \"%s\"\n";
84    testmessage.int32value.funcs.decode = &print_int32;
85    testmessage.int32value.arg = "int32value: %ld\n";
86    testmessage.fixed32value.funcs.decode = &print_fixed32;
87    testmessage.fixed32value.arg = "fixed32value: %ld\n";
88    testmessage.fixed64value.funcs.decode = &print_fixed64;
89    testmessage.fixed64value.arg = "fixed64value: %ld\n";
90    testmessage.repeatedstring.funcs.decode = &print_string;
91    testmessage.repeatedstring.arg = "repeatedstring: \"%s\"\n";
92
93    if (!pb_decode(&stream, TestMessage_fields, &testmessage))
94        return 1;
95
96    return 0;
97}
98