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# test ustruct with a count specified before the type
try:
import ustruct as struct
except:
try:
import struct
except ImportError:
print("SKIP")
raise SystemExit
print(struct.calcsize('0s'))
print(struct.unpack('0s', b''))
print(struct.pack('0s', b'123'))
print(struct.calcsize('2s'))
print(struct.unpack('2s', b'12'))
print(struct.pack('2s', b'123'))
print(struct.calcsize('2H'))
print(struct.unpack('<2H', b'1234'))
print(struct.pack('<2H', 258, 515))
print(struct.calcsize('0s1s0H2H'))
print(struct.unpack('<0s1s0H2H', b'01234'))
print(struct.pack('<0s1s0H2H', b'abc', b'abc', 258, 515))
# check that unknown types raise an exception
try:
struct.unpack('z', b'1')
except:
print('Exception')
try:
struct.pack('z', (b'1',))
except:
print('Exception')
try:
struct.calcsize('0z')
except:
print('Exception')
# check that a count without a type specifier raises an exception
try:
struct.calcsize('1')
except:
print('Exception')
try:
struct.pack('1')
except:
print('Exception')
try:
struct.pack_into('1', bytearray(4), 0, 'xx')
except:
print('Exception')
try:
struct.unpack('1', 'xx')
except:
print('Exception')
try:
struct.unpack_from('1', 'xx')
except:
print('Exception')
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