214b0eae8a
NOTE: This change breaks backwards-compatibility by default.
If you have old callback functions, you can define PB_OLD_CALLBACK_STYLE
to retain the old behaviour.
If you want to convert your old callbacks to new signature, you need
to do the following:
1) Change decode callback argument to void **arg
and encode callback argument to void * const *arg.
2) Change any reference to arg into *arg.
The rationale for making the new behaviour the default is that it
simplifies the common case of "allocate some memory in decode callback".
Update issue 69
Status: FixedInGit
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* Encoding testcase for callback fields */
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#include <stdio.h>
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#include <string.h>
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#include <pb_encode.h>
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#include "callbacks.pb.h"
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bool encode_string(pb_ostream_t *stream, const pb_field_t *field, void * const *arg)
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{
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char *str = "Hello world!";
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if (!pb_encode_tag_for_field(stream, field))
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return false;
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return pb_encode_string(stream, (uint8_t*)str, strlen(str));
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}
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bool encode_int32(pb_ostream_t *stream, const pb_field_t *field, void * const *arg)
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{
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if (!pb_encode_tag_for_field(stream, field))
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return false;
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return pb_encode_varint(stream, 42);
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}
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bool encode_fixed32(pb_ostream_t *stream, const pb_field_t *field, void * const *arg)
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{
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if (!pb_encode_tag_for_field(stream, field))
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return false;
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uint32_t value = 42;
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return pb_encode_fixed32(stream, &value);
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}
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bool encode_fixed64(pb_ostream_t *stream, const pb_field_t *field, void * const *arg)
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{
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if (!pb_encode_tag_for_field(stream, field))
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return false;
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uint64_t value = 42;
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return pb_encode_fixed64(stream, &value);
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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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pb_ostream_t stream = pb_ostream_from_buffer(buffer, 1024);
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TestMessage testmessage = {};
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testmessage.stringvalue.funcs.encode = &encode_string;
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testmessage.int32value.funcs.encode = &encode_int32;
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testmessage.fixed32value.funcs.encode = &encode_fixed32;
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testmessage.fixed64value.funcs.encode = &encode_fixed64;
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testmessage.has_submsg = true;
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testmessage.submsg.stringvalue.funcs.encode = &encode_string;
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testmessage.submsg.int32value.funcs.encode = &encode_int32;
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testmessage.submsg.fixed32value.funcs.encode = &encode_fixed32;
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testmessage.submsg.fixed64value.funcs.encode = &encode_fixed64;
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if (!pb_encode(&stream, TestMessage_fields, &testmessage))
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return 1;
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if (fwrite(buffer, stream.bytes_written, 1, stdout) != 1)
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return 2;
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return 0;
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}
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