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|
import sys
import numpy as np
import struct
try:
xrange
except NameError:
xrange = range
def _clip_uint32(x):
return x & 0xFFFFFFFF
def _robotraconteur_test_lfsr_next(lfsr):
bit = ((lfsr >> 0) ^ (lfsr >> 1) ^ (lfsr >> 21) ^ (lfsr >> 31)) & 1
return _clip_uint32((lfsr >> 1) | (bit << 31))
def _robotraconteur_test_lfsr_initkey(seed, key):
# Run the LFSR a few times on the seed to shuffle
for i in xrange(128):
seed = _robotraconteur_test_lfsr_next(seed)
i = 0
hash_ = _robotraconteur_test_lfsr_next(seed)
while (i != len(key)):
hash_ = _clip_uint32(hash_ + ord(key[i]))
i += 1
hash_ = _clip_uint32(hash_ + _clip_uint32(hash_ << 10))
hash_ = hash_ ^ _clip_uint32(hash_ >> 6)
hash_ = _clip_uint32(hash_ + _clip_uint32(hash_ << 3))
hash_ = hash_ ^ (hash_ >> 11)
hash_ = _clip_uint32(hash_ + _clip_uint32(hash_ << 15))
# Shuffle again
for i in xrange(128):
hash_ = _robotraconteur_test_lfsr_next(hash_)
return _robotraconteur_test_lfsr_next(hash_)
def _robotraconteur_test_lfsr_next_char(lfsr):
chars = " !\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
lfsr2 = _robotraconteur_test_lfsr_next(lfsr)
ind_ = lfsr2 % len(chars)
return lfsr2, chars[ind_]
def _robotraconteur_test_lfsr_next_len(lfsr, max_len):
lfsr2 = _robotraconteur_test_lfsr_next(lfsr)
if (max_len < 32):
len_out = lfsr2 % max_len
else:
len_out = 8 + lfsr2 % (max_len - 8)
return lfsr2, len_out
def _robotraconteur_test_lfsr_next_dist(lfsr, min_, max_):
assert (max_ > min_)
lfsr2 = _robotraconteur_test_lfsr_next(lfsr)
val_out = (lfsr2 % ((max_ - min_) + 1)) + min_
return lfsr2, val_out
def _reinterpret_cast(fmt, x):
b = struct.pack("<I", x)
return struct.unpack_from("<" + fmt, b)[0]
def _next_typed(lfsr, fmt):
lfsr2 = _robotraconteur_test_lfsr_next(lfsr)
val_out = _reinterpret_cast(fmt, lfsr2)
return lfsr2, val_out
def _reinterpret_cast2(fmt, x):
b = struct.pack("<Q", x)
return struct.unpack_from("<" + fmt, b)[0]
def _next_typed2(lfsr, fmt):
lfsr2 = _robotraconteur_test_lfsr_next(lfsr)
lfsr3 = _robotraconteur_test_lfsr_next(lfsr2)
val_uint64 = (lfsr2 << 32) | lfsr3
val_out = _reinterpret_cast2(fmt, val_uint64)
return lfsr3, val_out
def _next_array(fn, dtype, len_):
ret = np.zeros((len_), dtype=dtype)
for i in xrange(len_):
ret[i] = fn()
return ret
def _next_array_var_len(fn, dtype, max_len, len_fn):
len_ = len_fn(max_len)
return _next_array(fn, dtype, len_)
class LFSRSeqGen:
def __init__(self, seed, key=None):
if key is None:
self.lfsr = seed
else:
self.lfsr = _robotraconteur_test_lfsr_initkey(seed, key)
def _next_typed(self, fmt):
self.lfsr, val_out = _next_typed(self.lfsr, fmt)
return val_out
def _next_typed2(self, fmt):
self.lfsr, val_out = _next_typed2(self.lfsr, fmt)
return val_out
def next_int8(self):
return self._next_typed("b")
def next_uint8(self):
return self._next_typed("B")
def next_int16(self):
return self._next_typed("h")
def next_uint16(self):
return self._next_typed("H")
def next_int32(self):
return self._next_typed("i")
def next_uint32(self):
return self._next_typed("I")
def next_int64(self):
return self._next_typed2("q")
def next_uint64(self):
return self._next_typed2("Q")
def next_float(self):
return self._next_typed("f")
def next_double(self):
return self._next_typed2("d")
def next_bool(self):
return (self._next_typed("I") & 0x1) != 0
def next_cfloat(self):
return self._next_typed("f") + (self._next_typed("f") * 1j)
def next_cdouble(self):
return self._next_typed2("d") + (self._next_typed2("d") * 1j)
def next_char(self):
self.lfsr, val_out = _robotraconteur_test_lfsr_next_char(self.lfsr)
return val_out
def next_len(self, max_len):
self.lfsr, val_out = _robotraconteur_test_lfsr_next_len(
self.lfsr, max_len)
return val_out
def next_dist(self, min_, max_):
self.lfsr, val_out = _robotraconteur_test_lfsr_next_dist(
self.lfsr, min_, max_)
return val_out
def next_int8_array(self, len_):
return _next_array(self.next_int8, np.int8, len_)
def next_uint8_array(self, len_):
return _next_array(self.next_uint8, np.uint8, len_)
def next_int16_array(self, len_):
return _next_array(self.next_int16, np.int16, len_)
def next_uint16_array(self, len_):
return _next_array(self.next_uint16, np.uint16, len_)
def next_int32_array(self, len_):
return _next_array(self.next_int32, np.int32, len_)
def next_uint32_array(self, len_):
return _next_array(self.next_uint32, np.uint32, len_)
def next_int64_array(self, len_):
return _next_array(self.next_int64, np.int64, len_)
def next_uint64_array(self, len_):
return _next_array(self.next_uint64, np.uint64, len_)
def next_float_array(self, len_):
return _next_array(self.next_float, np.float32, len_)
def next_double_array(self, len_):
return _next_array(self.next_double, np.float64, len_)
def next_bool_array(self, len_):
return _next_array(self.next_bool, np.bool8, len_)
def next_cfloat_array(self, len_):
return _next_array(self.next_cfloat, np.complex64, len_)
def next_cdouble_array(self, len_):
return _next_array(self.next_cdouble, np.complex128, len_)
def next_string(self, len_):
out = ""
for _ in xrange(len_):
out += self.next_char()
return out
def next_int8_array_var_len(self, max_len):
return _next_array_var_len(self.next_int8, np.int8, max_len, self.next_len)
def next_uint8_array_var_len(self, max_len):
return _next_array_var_len(self.next_uint8, np.uint8, max_len, self.next_len)
def next_int16_array_var_len(self, max_len):
return _next_array_var_len(self.next_int16, np.int16, max_len, self.next_len)
def next_uint16_array_var_len(self, max_len):
return _next_array_var_len(self.next_uint16, np.int16, max_len, self.next_len)
def next_int32_array_var_len(self, max_len):
return _next_array_var_len(self.next_int32, np.int32, max_len, self.next_len)
def next_uint32_array_var_len(self, max_len):
return _next_array_var_len(self.next_uint32, np.uint32, max_len, self.next_len)
def next_int64_array_var_len(self, max_len):
return _next_array_var_len(self.next_int64, np.int64, max_len, self.next_len)
def next_uint64_array_var_len(self, max_len):
return _next_array_var_len(self.next_uint64, np.uint64, max_len, self.next_len)
def next_float_array_var_len(self, max_len):
return _next_array_var_len(self.next_float, np.float32, max_len, self.next_len)
def next_double_array_var_len(self, max_len):
return _next_array_var_len(self.next_double, np.float64, max_len, self.next_len)
def next_bool_array_var_len(self, max_len):
return _next_array_var_len(self.next_bool, np.bool8, max_len, self.next_len)
def next_cfloat_array_var_len(self, max_len):
return _next_array_var_len(self.next_cfloat, np.complex64, max_len, self.next_len)
def next_cdouble_array_var_len(self, max_len):
return _next_array_var_len(self.next_cdouble, np.complex128, max_len, self.next_len)
def next_string_var_len(self, max_len):
len_ = self.next_len(max_len)
out = ""
for _ in xrange(len_):
out += self.next_char()
return out
if __name__ == "__main__":
count = 8
seed = 35913226
key = "Hello World!"
if (len(sys.argv) > 1):
key = sys.argv[1]
seqgen = LFSRSeqGen(seed, key)
print(seqgen.next_int8_array(count))
print(seqgen.next_uint8_array(count))
print(seqgen.next_int16_array(count))
print(seqgen.next_uint16_array(count))
print(seqgen.next_int32_array(count))
print(seqgen.next_uint32_array(count))
print(seqgen.next_int64_array(count))
print(seqgen.next_uint64_array(count))
print(seqgen.next_float_array(count))
print(seqgen.next_double_array(count))
print(seqgen.next_string(count))
print(seqgen.next_bool_array(count))
print(seqgen.next_cfloat_array(count))
print(seqgen.next_cdouble_array(count))
print()
print(seqgen.next_int8_array_var_len(count))
print(seqgen.next_uint8_array_var_len(count))
print(seqgen.next_int16_array_var_len(count))
print(seqgen.next_uint16_array_var_len(count))
print(seqgen.next_int32_array_var_len(count))
print(seqgen.next_uint32_array_var_len(count))
print(seqgen.next_int64_array_var_len(count))
print(seqgen.next_uint64_array_var_len(count))
print(seqgen.next_float_array_var_len(count))
print(seqgen.next_double_array_var_len(count))
print(seqgen.next_string_var_len(count))
print(seqgen.next_bool_array_var_len(count))
print(seqgen.next_cfloat_array_var_len(count))
print(seqgen.next_cdouble_array_var_len(count))
|
