1 /* Decoding testcase for callback fields.
2 * Run e.g. ./test_encode_callbacks | ./test_decode_callbacks
7 #include "callbacks.pb.h"
9 bool print_string(pb_istream_t *stream, const pb_field_t *field, void *arg)
11 uint8_t buffer[1024] = {0};
13 /* We could read block-by-block to avoid the large buffer... */
14 if (stream->bytes_left > sizeof(buffer) - 1)
17 if (!pb_read(stream, buffer, stream->bytes_left))
20 /* Print the string, in format comparable with protoc --decode.
21 * Format comes from the arg defined in main().
23 printf((char*)arg, buffer);
27 bool print_int32(pb_istream_t *stream, const pb_field_t *field, void *arg)
30 if (!pb_decode_varint(stream, &value))
33 printf((char*)arg, (long)value);
37 bool print_fixed32(pb_istream_t *stream, const pb_field_t *field, void *arg)
40 if (!pb_decode_fixed32(stream, &value))
43 printf((char*)arg, (long)value);
47 bool print_fixed64(pb_istream_t *stream, const pb_field_t *field, void *arg)
50 if (!pb_decode_fixed64(stream, &value))
53 printf((char*)arg, (long long)value);
60 size_t length = fread(buffer, 1, 1024, stdin);
61 pb_istream_t stream = pb_istream_from_buffer(buffer, length);
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.
67 TestMessage testmessage = {};
69 testmessage.submsg.stringvalue.funcs.decode = &print_string;
70 testmessage.submsg.stringvalue.arg = "submsg {\n stringvalue: \"%s\"\n";
71 testmessage.submsg.int32value.funcs.decode = &print_int32;
72 testmessage.submsg.int32value.arg = " int32value: %ld\n";
73 testmessage.submsg.fixed32value.funcs.decode = &print_fixed32;
74 testmessage.submsg.fixed32value.arg = " fixed32value: %ld\n";
75 testmessage.submsg.fixed64value.funcs.decode = &print_fixed64;
76 testmessage.submsg.fixed64value.arg = " fixed64value: %lld\n}\n";
78 testmessage.stringvalue.funcs.decode = &print_string;
79 testmessage.stringvalue.arg = "stringvalue: \"%s\"\n";
80 testmessage.int32value.funcs.decode = &print_int32;
81 testmessage.int32value.arg = "int32value: %ld\n";
82 testmessage.fixed32value.funcs.decode = &print_fixed32;
83 testmessage.fixed32value.arg = "fixed32value: %ld\n";
84 testmessage.fixed64value.funcs.decode = &print_fixed64;
85 testmessage.fixed64value.arg = "fixed64value: %lld\n";
87 if (!pb_decode(&stream, TestMessage_fields, &testmessage))