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5610573 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | #!/usr/bin/env python
import math
radix = 8
scale = 1<<radix
out_radix = 10
out_scale = 1<<out_radix
byx = 0.
logtab = []
while True:
if byx < 1:
lobyx = (math.log(-math.expm1(-(byx + 1.)/scale)) - math.log((byx + 1.)/scale)) / 2.0
else:
lobyx = (math.log(-math.expm1(-byx/scale)) - math.log(byx/scale) +
math.log(-math.expm1(-(byx + 1.)/scale)) - math.log((byx + 1.)/scale)) / 2.0
lobyx = -lobyx * out_scale
k = int(round(lobyx))
logtab.append(k)
if byx > 0:
stop = int(round(math.log(-math.expm1(-byx/scale)) * out_scale))
if stop == 0:
break
byx = byx + 1.
print "static const uint16 logsub_table[] = {"
for i in range(0,len(logtab),10):
if i+10 <= len(logtab):
print ", ".join(str(x) for x in logtab[i:i+10]) + ","
else:
print ", ".join(str(x) for x in logtab[i:])
print "};"
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