static int
avro_datum_value_get_int(const avro_value_iface_t *iface,
const void *vself, int32_t *out)
{
AVRO_UNUSED(iface);
const avro_datum_t self = (const avro_datum_t) vself;
check_param(EINVAL, self, "datum instance");
int rval;
int32_t value;
check(rval, avro_int32_get(self, &value));
*out = value;
return 0;
}
static int read_data_datum() {
int rval;
int records_read = 0;
avro_file_reader_t reader;
avro_datum_t datum;
fprintf(stderr, "\nReading...\n");
rval = avro_file_reader(filename, &reader);
if (rval) {
fprintf(stderr, "Error using 'datum': %s\n", avro_strerror());
return -1;
}
avro_schema_t schema = avro_file_reader_get_writer_schema(reader);
while ((rval = avro_file_reader_read(reader, schema, &datum)) == 0) {
avro_datum_t val_datum;
int32_t val;
if (avro_record_get(datum, "ab", &val_datum)) {
fprintf(stderr, "Error getting value: %s\n", avro_strerror());
return -1;
}
avro_int32_get(val_datum, &val);
fprintf(stderr, "value = %d\n", val);
records_read++;
avro_datum_decref(datum);
}
avro_schema_decref(schema);
avro_file_reader_close(reader);
fprintf(stderr, "read %d records using 'datum'.\n", records_read);
if (rval != EOF) {
fprintf(stderr, "Error using 'datum': %s\n", avro_strerror());
return -1;
}
return records_read;
}
/*输出数据库中的学生信息*/
int show_student(avro_file_reader_t db,
avro_schema_t reader_schema)
{
int rval;
avro_datum_t student;
rval = avro_file_reader_read(db, reader_schema, &student);
if (rval == 0) {
int64_t i64;
int32_t i32;
char *p;
avro_datum_t sid_datum, name_datum, dept_datum,
phone_datum, age_datum;
if (avro_record_get(student, "SID", &sid_datum) == 0) {
avro_int64_get(sid_datum, &i64);
fprintf(stdout, "%"PRId64" ", i64);
}
if (avro_record_get(student, "Name", &name_datum) == 0) {
avro_string_get(name_datum, &p);
fprintf(stdout, "%12s ", p);
}
if (avro_record_get(student, "Dept", &dept_datum) == 0) {
avro_string_get(dept_datum, &p);
fprintf(stdout, "%12s ", p);
}
if (avro_record_get(student, "Phone", &phone_datum) == 0) {
avro_string_get(phone_datum, &p);
fprintf(stdout, "%12s ", p);
}
if (avro_record_get(student, "Age", &age_datum) == 0) {
avro_int32_get(age_datum, &i32);
fprintf(stdout, "%d", i32);
}
fprintf(stdout, "\n");
/*释放记录*/
avro_datum_decref(student);
}
return rval;
}
