5 from simplejson._speedups import make_scanner as c_make_scanner
9 __all__ = ['make_scanner']
11 NUMBER_RE = re.compile(
12 r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?',
13 (re.VERBOSE | re.MULTILINE | re.DOTALL))
15 def py_make_scanner(context):
16 parse_object = context.parse_object
17 parse_array = context.parse_array
18 parse_string = context.parse_string
19 match_number = NUMBER_RE.match
20 encoding = context.encoding
21 strict = context.strict
22 parse_float = context.parse_float
23 parse_int = context.parse_int
24 parse_constant = context.parse_constant
25 object_hook = context.object_hook
27 def _scan_once(string, idx):
29 nextchar = string[idx]
34 return parse_string(string, idx + 1, encoding, strict)
36 return parse_object((string, idx + 1), encoding, strict, _scan_once, object_hook)
38 return parse_array((string, idx + 1), _scan_once)
39 elif nextchar == 'n' and string[idx:idx + 4] == 'null':
41 elif nextchar == 't' and string[idx:idx + 4] == 'true':
43 elif nextchar == 'f' and string[idx:idx + 5] == 'false':
46 m = match_number(string, idx)
48 integer, frac, exp = m.groups()
50 res = parse_float(integer + (frac or '') + (exp or ''))
52 res = parse_int(integer)
54 elif nextchar == 'N' and string[idx:idx + 3] == 'NaN':
55 return parse_constant('NaN'), idx + 3
56 elif nextchar == 'I' and string[idx:idx + 8] == 'Infinity':
57 return parse_constant('Infinity'), idx + 8
58 elif nextchar == '-' and string[idx:idx + 9] == '-Infinity':
59 return parse_constant('-Infinity'), idx + 9
65 make_scanner = c_make_scanner or py_make_scanner