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"""
ldap.schema.tokenizer - Low-level parsing functions for schema element strings
See http://www.python-ldap.org/ for details.
\$Id: tokenizer.py,v 1.13 2009/04/29 18:13:55 stroeder Exp $
"""
def split_tokens(s,keywordDict):
"""
Returns list of syntax elements with quotes and spaces
stripped.
"""
result = []
result_append = result.append
s_len = len(s)
i = 0
while i<s_len:
start = i
while i<s_len and s[i]!="'":
if s[i]=="(" or s[i]==")":
if i>start:
result_append(s[start:i])
result_append(s[i])
i +=1 # Consume parentheses
start = i
elif s[i]==" " or s[i]=="$":
if i>start:
result_append(s[start:i])
i +=1
# Consume more space chars
while i<s_len and s[i]==" ":
i +=1
start = i
else:
i +=1
if i>start:
result_append(s[start:i])
i +=1
if i>=s_len:
break
start = i
while i<s_len and s[i]!="'":
i +=1
if i>=start:
result_append(s[start:i])
i +=1
return result # split_tokens()
def extract_tokens(l,known_tokens):
"""
Returns dictionary of known tokens with all values
"""
assert l[0].strip()=="(" and l[-1].strip()==")",ValueError(l)
result = {}
result_has_key = result.has_key
result.update(known_tokens)
i = 0
l_len = len(l)
while i<l_len:
if result_has_key(l[i]):
token = l[i]
i += 1 # Consume token
if i<l_len:
if result_has_key(l[i]):
# non-valued
result[token] = (())
elif l[i]=="(":
# multi-valued
i += 1 # Consume left parentheses
start = i
while i<l_len and l[i]!=")":
i += 1
result[token] = tuple(filter(lambda v:v!='$',l[start:i]))
i += 1 # Consume right parentheses
else:
# single-valued
result[token] = l[i],
i += 1 # Consume single value
else:
i += 1 # Consume unrecognized item
return result