44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* Decoding testcase for callback fields.
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* Run e.g. ./test_encode_callbacks | ./test_decode_callbacks
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*/
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#include <stdio.h>
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#include <pb_decode.h>
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#include "callbacks.pb.h"
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bool print_string(pb_istream_t *stream, const pb_field_t *field, void *arg)
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{
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uint8_t buffer[1024];
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/* We could read block-by-block to avoid the large buffer... */
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if (stream->bytes_left > sizeof(buffer))
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return false;
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if (!pb_read(stream, buffer, stream->bytes_left))
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return false;
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/* Print the string, in format comparable with protoc --decode. */
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printf("%s: \"%s\"\n", (char*)arg, buffer);
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return true;
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}
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int main()
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{
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uint8_t buffer[1024];
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size_t length = fread(buffer, 1, 1024, stdin);
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pb_istream_t stream = pb_istream_from_buffer(buffer, length);
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/* Note: empty initializer list initializes the struct with all-0.
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* This is recommended so that unused callbacks are set to NULL instead
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* of crashing at runtime.
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*/
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TestMessage testmessage = {};
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testmessage.stringvalue.funcs.decode = &print_string;
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testmessage.stringvalue.arg = "stringvalue";
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if (!pb_decode(&stream, TestMessage_fields, &testmessage))
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return 1;
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return 0;
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} |