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Replace more float hacks with correct math functions

This commit is contained in:
Christian Heimes 2008-05-07 22:54:17 +00:00
parent 342c095b8c
commit 33e4a98a3e
1 changed files with 7 additions and 7 deletions
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10
Lib/json/encoder.py
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@ -2,6 +2,7 @@
""" """
import re import re
import math
try: try:
from _json import encode_basestring_ascii as c_encode_basestring_ascii from _json import encode_basestring_ascii as c_encode_basestring_ascii
@ -25,19 +26,18 @@ ESCAPE_DCT = {
for i in range(0x20): for i in range(0x20):
ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i)) ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
# Assume this produces an infinity on all machines (probably not guaranteed)
INFINITY = float('1e66666')
FLOAT_REPR = repr FLOAT_REPR = repr
def floatstr(o, allow_nan=True): def floatstr(o, allow_nan=True):
# Check for specials. Note that this type of test is processor- and/or # Check for specials. Note that this type of test is processor- and/or
# platform-specific, so do tests which don't depend on the internals. # platform-specific, so do tests which don't depend on the internals.
if o != o: if math.isnan(o):
text = 'NaN' text = 'NaN'
elif o == INFINITY: elif math.isinf(o):
if math.copysign(1., o) == 1.:
text = 'Infinity' text = 'Infinity'
elif o == -INFINITY: else:
text = '-Infinity' text = '-Infinity'
else: else:
return FLOAT_REPR(o) return FLOAT_REPR(o)