int main() {
int i;
int d;
int *p;
int (*fp)();
chk_p = &d;
chk_fp = &f;
for( i = 0; i < 16; ++i ) {
p = ( i & 0x01 ) ? &d : 0;
check_p( p, __LINE__ );
p = ( i & 0x01 ) ? 0 : &d;
check_p( p, __LINE__ );
fp = ( i & 0x01 ) ? &f : 0;
check_fp( fp, __LINE__ );
fp = ( i & 0x01 ) ? 0 : &f;
check_fp( fp, __LINE__ );
}
_PASS;
}
static void
read_using_writer_schema(const char *filename)
{
avro_file_reader_t file;
avro_schema_t writer_schema;
avro_value_iface_t *writer_iface;
avro_value_t writer_value;
// Open an Avro file and grab the writer schema that was used to create the
// file.
check_i(avro_file_reader(filename, &file));
writer_schema = avro_file_reader_get_writer_schema(file);
// Then create a value that is an instance of the writer schema. As above,
// we use the built-in "generic" value implementation for the value instance
// that will actually store the data.
check_p(writer_iface = avro_generic_class_from_schema(writer_schema));
check_i(avro_generic_value_new(writer_iface, &writer_value));
// Read values from the file until we run out, printing the contents of each
// one. Here, we can read directly into `writer_value` since we know that
// it's an instance of the schema that was used to create the file.
while (avro_file_reader_read_value(file, &writer_value) == 0) {
avro_value_t field;
int32_t a;
int32_t b;
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_get_int(&field, &a));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_get_int(&field, &b));
printf(" a: %" PRId32 ", b: %" PRId32 "\n", a, b);
}
// Close the file and clean up after ourselves.
avro_file_reader_close(file);
avro_value_decref(&writer_value);
avro_value_iface_decref(writer_iface);
avro_schema_decref(writer_schema);
}
static void
write_data(const char *filename)
{
avro_file_writer_t file;
avro_schema_t writer_schema;
avro_schema_error_t error;
avro_value_iface_t *writer_iface;
avro_value_t writer_value;
avro_value_t field;
// First parse the JSON schema into the C API's internal schema
// representation.
check_i(avro_schema_from_json(WRITER_SCHEMA, 0, &writer_schema, &error));
// Then create a value that is an instance of that schema. We use the
// built-in "generic" value implementation, which is what you'll usually use
// to create value instances that can actually store data. We only need to
// create one instance, since we can re-use it for all of the values that
// we're going to write into the file.
check_p(writer_iface = avro_generic_class_from_schema(writer_schema));
check_i(avro_generic_value_new(writer_iface, &writer_value));
// Open a new data file for writing, and then write a slew of records into
// it.
check_i(avro_file_writer_create(filename, writer_schema, &file));
/* record 1 */
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_set_int(&field, 10));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_set_int(&field, 11));
check_i(avro_file_writer_append_value(file, &writer_value));
/* record 2 */
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_set_int(&field, 20));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_set_int(&field, 21));
check_i(avro_file_writer_append_value(file, &writer_value));
/* record 3 */
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_set_int(&field, 30));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_set_int(&field, 31));
check_i(avro_file_writer_append_value(file, &writer_value));
/* record 4 */
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_set_int(&field, 40));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_set_int(&field, 41));
check_i(avro_file_writer_append_value(file, &writer_value));
/* record 5 */
check_i(avro_value_get_by_name(&writer_value, "a", &field, NULL));
check_i(avro_value_set_int(&field, 50));
check_i(avro_value_get_by_name(&writer_value, "b", &field, NULL));
check_i(avro_value_set_int(&field, 51));
check_i(avro_file_writer_append_value(file, &writer_value));
// Close the file and clean up after ourselves.
avro_file_writer_close(file);
avro_value_decref(&writer_value);
avro_value_iface_decref(writer_iface);
avro_schema_decref(writer_schema);
}
static void
read_with_schema_resolution(const char *filename,
const char *reader_schema_json,
const char *field_name)
{
avro_file_reader_t file;
avro_schema_error_t error;
avro_schema_t reader_schema;
avro_schema_t writer_schema;
avro_value_iface_t *writer_iface;
avro_value_iface_t *reader_iface;
avro_value_t writer_value;
avro_value_t reader_value;
// Open an Avro file and grab the writer schema that was used to create the
// file.
check_i(avro_file_reader(filename, &file));
writer_schema = avro_file_reader_get_writer_schema(file);
// Create a value instance that we want to read the data into. Note that
// this is *not* the writer schema!
check_i(avro_schema_from_json
(reader_schema_json, 0, &reader_schema, &error));
check_p(reader_iface = avro_generic_class_from_schema(reader_schema));
check_i(avro_generic_value_new(reader_iface, &reader_value));
// Create a resolved writer that will perform the schema resolution for us.
// If the two schemas aren't compatible, this function will return an error,
// and the error text should describe which parts of the schemas are
// incompatible.
check_p(writer_iface =
avro_resolved_writer_new(writer_schema, reader_schema));
// Create an instance of the resolved writer, and tell it to wrap our reader
// value instance.
check_i(avro_resolved_writer_new_value(writer_iface, &writer_value));
avro_resolved_writer_set_dest(&writer_value, &reader_value);
// Now we've got the same basic loop as above. But we've got two value
// instances floating around! Which do we use? We have the file reader
// fill in `writer_value`, since that's the value that is an instance of the
// file's writer schema. Since it's an instance of a resolved writer,
// though, it doesn't actually store any data itself. Instead, it will
// perform schema resolution on the data read from the file, and fill in its
// wrapped value (which in our case is `reader_value`). That means that
// once the data has been read, we can get its (schema-resolved) contents
// via `reader_value`.
while (avro_file_reader_read_value(file, &writer_value) == 0) {
avro_value_t field;
int32_t value;
check_i(avro_value_get_by_name(&reader_value, field_name, &field, NULL));
check_i(avro_value_get_int(&field, &value));
printf(" %s: %" PRId32 "\n", field_name, value);
}
// Close the file and clean up after ourselves.
avro_file_reader_close(file);
avro_value_decref(&writer_value);
avro_value_iface_decref(writer_iface);
avro_schema_decref(writer_schema);
avro_value_decref(&reader_value);
avro_value_iface_decref(reader_iface);
avro_schema_decref(reader_schema);
}
// Check the integrity of tablefile
bool tablecheck(FILE *table) {
// Check IP vals
if(!check_ip(table)) {
// IP vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for IP (Initial Permutation) values.\n");
return false;
}
// Check E vals
if(!check_e(table)) {
// E vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for E (Expansion) values.\n");
return false;
}
// Check P vals
if(!check_p(table)) {
// P vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for P (Permutation) values.\n");
return false;
}
// Check S# vals
char header[3];
for(int i=1; i<=8; i++) {
sprintf(header, "S%d=", i);
if(!check_s(table, header)) {
// S# vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for S%d (Substitution) values.\n", i);
return false;
}
}
// Check V vals
if(!check_v(table)) {
// V vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for V (Circular Rotation) values.\n");
return false;
}
// Check PC1 vals
if(!check_pc1(table)) {
// PC1 vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for PC1 (Permutated Choice 1) values.\n");
return false;
}
// Check PC2 vals
if(!check_pc2(table)) {
// PC2 vals are invalid
fprintf(stderr, "ERROR: tablecheck failed for PC2 (Permutated Choice 2) values.\n");
return false;
}
return true;
// PSEUDO-CODE
// - Use read_line_vals method to search through file until finds a line starting with header
// - Read each item in the line into an array of ints, using comma delimiters to separate
// - Run whatever test is needed on the array to ensure that all the values are valid
// - Usually something like counting the instances of each number to ensure correct permutation
// - Repeat for all headers
}
