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- # test formatting floats with large precision, that it doesn't overflow the buffer
- def test(num, num_str):
- if num == float('inf') or num == 0.0 and num_str != '0.0':
- # skip numbers that overflow or underflow the FP precision
- return
- for kind in ('e', 'f', 'g'):
- # check precision either side of the size of the buffer (32 bytes)
- for prec in range(23, 36, 2):
- fmt = '%.' + '%d' % prec + kind
- s = fmt % num
- check = abs(float(s) - num)
- if num > 1:
- check /= num
- if check > 1e-6:
- print('FAIL', num_str, fmt, s, len(s), check)
- # check most powers of 10, making sure to include exponents with 3 digits
- for e in range(-101, 102):
- num = pow(10, e)
- test(num, '1e%d' % e)
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