71 lines
1.7 KiB
Python
71 lines
1.7 KiB
Python
import math
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from decimal import Decimal
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def decfun(f):
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def g(x):
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return Decimal(f(float(x)))
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return g
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def degree2decimal(f):
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def g(x):
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return Decimal(f(float(x) * math.pi / 180))
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return g
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def decimal2degree(f):
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def g(x):
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return Decimal(f(float(x)) * 180 / math.pi)
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return g
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def decimal_repr(x):
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# Remove trailing 0's
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x = x.normalize()
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if x == 0:
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return "0"
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# Keep only 10 digits for printing
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i, e = int(x._int), x._exp
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digits = len(str(i))
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overflow = digits - 10
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if overflow > 0:
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i = (i + (10 ** overflow) // 2) // (10 ** overflow)
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e += overflow
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digits = 10
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# Handle sign
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sign = "-" if x._sign else ""
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# Exponent in engineering notation (true exponent of value)
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true_exp = e + digits - 1
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# For integers up to 10 digits: print normally
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if e >= 0 and true_exp <= 9:
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return sign + str(i * 10 ** e)
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# For larger integers, use scientific notation
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elif e >= 0:
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dg = str(i)
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dg = dg[0] + "." + dg[1:] + "e" + str(true_exp)
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return sign + dg
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# Otherwise, if there are less than 10 digits overall: print normally
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elif true_exp >= -9:
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supplement = max(-true_exp, 0)
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dg = "0" * supplement + str(i)
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true_exp += supplement
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dg = dg[:true_exp+1] + "." + dg[true_exp+1:]
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return sign + dg
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# For very small numbers, use scientific notation again
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else:
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dg = str(i)
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dg = dg[0] + "." + dg[1:] + "e" + str(true_exp)
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return sign + dg
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def rndcoord(x):
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halfint = (int(x) != x) and (int(2*x) == 2*x)
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sign = -1 if x < 0 else 1
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return int(round(x)) + int(halfint) * sign
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