int avro_file_reader_read(avro_file_reader_t r, avro_schema_t readers_schema,
avro_datum_t * datum)
{
int rval;
char sync[16];
if (!r || !datum) {
return EINVAL;
}
check(rval,
avro_read_data(r->reader, r->writers_schema, readers_schema,
datum));
r->blocks_read++;
if (r->blocks_read == r->blocks_total) {
check(rval, avro_read(r->reader, sync, sizeof(sync)));
if (memcmp(r->sync, sync, sizeof(r->sync)) != 0) {
/* wrong sync bytes */
return EILSEQ;
}
/* For now, ignore errors (e.g. EOF) */
file_read_block_count(r);
}
return 0;
}
static int file_read_header(avro_reader_t reader,
avro_schema_t * writers_schema, char *sync,
int synclen)
{
int rval;
avro_schema_t meta_schema;
avro_schema_t meta_values_schema;
avro_datum_t meta;
char magic[4];
avro_datum_t schema_bytes;
char *p;
int64_t len;
avro_schema_error_t schema_error;
check(rval, avro_read(reader, magic, sizeof(magic)));
if (magic[0] != 'O' || magic[1] != 'b' || magic[2] != 'j'
|| magic[3] != 1) {
return EILSEQ;
}
meta_values_schema = avro_schema_bytes();
meta_schema = avro_schema_map(meta_values_schema);
rval = avro_read_data(reader, meta_schema, NULL, &meta);
if (rval) {
return EILSEQ;
}
check(rval, avro_map_get(meta, "avro.schema", &schema_bytes));
avro_bytes_get(schema_bytes, &p, &len);
check(rval,
avro_schema_from_json(p, len, writers_schema, &schema_error));
avro_schema_decref(meta);
return avro_read(reader, sync, synclen);
}
void
write_read_check(avro_schema_t writers_schema, avro_datum_t datum,
avro_schema_t readers_schema, avro_datum_t expected, char *type)
{
avro_datum_t datum_out;
int validate;
for (validate = 0; validate <= 1; validate++) {
reader = avro_reader_memory(buf, sizeof(buf));
writer = avro_writer_memory(buf, sizeof(buf));
if (!expected) {
expected = datum;
}
/* Validating read/write */
if (avro_write_data
(writer, validate ? writers_schema : NULL, datum)) {
fprintf(stderr, "Unable to write %s validate=%d\n %s\n",
type, validate, avro_strerror());
exit(EXIT_FAILURE);
}
int64_t size =
avro_size_data(writer, validate ? writers_schema : NULL,
datum);
if (size != avro_writer_tell(writer)) {
fprintf(stderr,
"Unable to calculate size %s validate=%d "
"(%"PRId64" != %"PRId64")\n %s\n",
type, validate, size, avro_writer_tell(writer),
avro_strerror());
exit(EXIT_FAILURE);
}
if (avro_read_data
(reader, writers_schema, readers_schema, &datum_out)) {
fprintf(stderr, "Unable to read %s validate=%d\n %s\n",
type, validate, avro_strerror());
fprintf(stderr, " %s\n", avro_strerror());
exit(EXIT_FAILURE);
}
if (!avro_datum_equal(expected, datum_out)) {
fprintf(stderr,
"Unable to encode/decode %s validate=%d\n %s\n",
type, validate, avro_strerror());
exit(EXIT_FAILURE);
}
avro_reader_dump(reader, stderr);
avro_datum_decref(datum_out);
avro_reader_free(reader);
avro_writer_free(writer);
}
}