_res, pos = '', 0

while pos < len(src):

if src[pos] in ('"', "'", '`') or \

(src[pos] == '/' and src[pos - 1] == '('):

# the end of the string is the next quote if it is not

# after an odd number of backslashes

start = pos

while True:

end = src.find(src[pos], start + 1)

if end == -1:

line = src[:pos].count('\n')

raise SyntaxError('string not closed in line %s : %s' %

(line, src[pos:pos + 20]))

else:

# count number of backslashes before the quote

nb = 0

while src[end - nb - 1] == '\\':

nb += 1

if not nb % 2:

break

else:

start = end

_res += src[pos:end + 1]

pos = end + 1

elif src[pos] == '\r':

pos += 1

elif src[pos] == ' ':

if _res and _res[-1] in '({=[)}];:+-*/|\n':

pos += 1

continue

_res += ' '

while pos < len(src) and src[pos] == ' ':

pos += 1

elif src[pos:pos + 2] == '//':

end = src.find('\n', pos)

if end == -1:

break

pos = end

elif src[pos:pos + 2] == '/*':

end = src.find('*/', pos)

if end == -1:

break

pos = end+2

elif src[pos] in '={[(' and _res and _res[-1] == ' ':

_res = _res[:-1]+src[pos]

pos += 1

elif src[pos] in '{[,':

_res += src[pos]

while pos < len(src) - 1 and src[pos + 1] in ' \r\n':

pos += 1

pos += 1

elif src[pos] in '+-*/':

while _res[-1] == " ":

_res = _res[:-1]

_res += src[pos]

pos += 1

elif src[pos] == '}':

_res += src[pos]

nxt = pos + 1

while nxt < len(src) and src[nxt] in ' \r\n':

nxt += 1

if nxt < len(src) and src[nxt] == '}':

pos = nxt - 1

pos += 1

else:

_res += src[pos]

pos += 1

# replace consecutive newlines

_res = re.sub('\n+', '\n', _res)

# remove newline followed by }

_res = re.sub('\n}', '}', _res)