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Compress floats as much as possible. Also output NaN and Infinity as strings.

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Sei Lisa 2014-07-28 20:38:44 +02:00
parent cd9fa96055
commit c748472187
1 changed files with 33 additions and 5 deletions
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38
lslopt/lsloutput.py
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@ -42,30 +42,58 @@ class outscript(object):
return str(value)
if tvalue == float:
if self.optsigns and value.is_integer() and -2147483648.0 <= value < 2147483648.0:
if self.globalmode and not self.listmode:# or value >= 0:
if self.globalmode and not self.listmode:
return str(int(value))
elif not self.globalmode:
# Important inside lists!!
return '((float)' + str(int(value)) + ')'
s = str(value)
if s in ('inf', '-inf', 'nan'):
return '((float)"' + s + '")' # this shouldn't appear in globals
# Try to remove as many decimals as possible but keeping the F32 value intact
exp = s.find('e')
if ~exp:
s, exp = s[:exp], s[exp:]
if exp[1] == '+':
exp = exp[:1] + exp[2:]
if '.' not in s:
# I couldn't produce one but it's assumed that if it happens,
# this code deals with it correctly
# FIXME: Not true, it should handle (float) conversion.
return s + exp # pragma: no cover
s += '.' # pragma: no cover
else:
if '.' not in s:
# This should never happen (Python should always return a point or exponent)
return s + '.' # pragma: no cover
exp = ''
# TODO: Move this to a separate function to fix the above.
# Shorten the float as much as possible.
while s[-1] != '.' and lslfuncs.F32(float(s[:-1]+exp)) == value:
s = s[:-1]
# TODO: Refine.
if s[-1] != '.':
news = s
neg = ''
if s[0] == '-':
news = s[1:]
neg = '-'
# Try harder
point = news.index('.') + 1 - len(news) # Remove point
news = str(int(news[:point-1] + news[point:]) + 1) # Increment
news = news[:point + len(news)] + '.' + news[point + len(news):] # Reinsert point
# Repeat the operation with the incremented number
while news[-1] != '.' and lslfuncs.F32(float(neg+news[:-1]+exp)) == value:
news = news[:-1]
if len(neg+news) < len(s) and lslfuncs.F32(float(neg+news[:-1]+exp)) == value:
# Success! But we try even harder.
if exp != '':
if news[2:3] == '.': # we converted 9.9... into 10.
newexp = 'e' + str(int(exp[1:])+1) # increase exponent
news2 = news[0] + '.' + news[1] + news[3:] # move dot to the left
while news2[-1] == '0': # remove trailing zeros
news2 = news2[:-1]
if len(neg+news2) < len(s) and lslfuncs.F32(float(neg+news2[:-1]+newexp)) == value:
news = news2
exp = newexp
s = neg+news
if value >= 0 or self.globalmode or not self.optsigns:
return s + exp
return '((float)' + s + exp + ')'