4 def _import_c_make_scanner():
6 from simplejson._speedups import make_scanner
10 c_make_scanner = _import_c_make_scanner()
12 __all__ = ['make_scanner']
14 NUMBER_RE = re.compile(
15 r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?',
16 (re.VERBOSE | re.MULTILINE | re.DOTALL))
18 def py_make_scanner(context):
19 parse_object = context.parse_object
20 parse_array = context.parse_array
21 parse_string = context.parse_string
22 match_number = NUMBER_RE.match
23 encoding = context.encoding
24 strict = context.strict
25 parse_float = context.parse_float
26 parse_int = context.parse_int
27 parse_constant = context.parse_constant
28 object_hook = context.object_hook
29 object_pairs_hook = context.object_pairs_hook
32 def _scan_once(string, idx):
34 nextchar = string[idx]
39 return parse_string(string, idx + 1, encoding, strict)
41 return parse_object((string, idx + 1), encoding, strict,
42 _scan_once, object_hook, object_pairs_hook, memo)
44 return parse_array((string, idx + 1), _scan_once)
45 elif nextchar == 'n' and string[idx:idx + 4] == 'null':
47 elif nextchar == 't' and string[idx:idx + 4] == 'true':
49 elif nextchar == 'f' and string[idx:idx + 5] == 'false':
52 m = match_number(string, idx)
54 integer, frac, exp = m.groups()
56 res = parse_float(integer + (frac or '') + (exp or ''))
58 res = parse_int(integer)
60 elif nextchar == 'N' and string[idx:idx + 3] == 'NaN':
61 return parse_constant('NaN'), idx + 3
62 elif nextchar == 'I' and string[idx:idx + 8] == 'Infinity':
63 return parse_constant('Infinity'), idx + 8
64 elif nextchar == '-' and string[idx:idx + 9] == '-Infinity':
65 return parse_constant('-Infinity'), idx + 9
69 def scan_once(string, idx):
71 return _scan_once(string, idx)
77 make_scanner = c_make_scanner or py_make_scanner