+++ /dev/null
-"""JSON token scanner\r
-"""\r
-import re\r
-try:\r
- from _json import make_scanner as c_make_scanner\r
-except ImportError:\r
- c_make_scanner = None\r
-\r
-__all__ = ['make_scanner']\r
-\r
-NUMBER_RE = re.compile(\r
- r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?',\r
- (re.VERBOSE | re.MULTILINE | re.DOTALL))\r
-\r
-def py_make_scanner(context):\r
- parse_object = context.parse_object\r
- parse_array = context.parse_array\r
- parse_string = context.parse_string\r
- match_number = NUMBER_RE.match\r
- encoding = context.encoding\r
- strict = context.strict\r
- parse_float = context.parse_float\r
- parse_int = context.parse_int\r
- parse_constant = context.parse_constant\r
- object_hook = context.object_hook\r
- object_pairs_hook = context.object_pairs_hook\r
-\r
- def _scan_once(string, idx):\r
- try:\r
- nextchar = string[idx]\r
- except IndexError:\r
- raise StopIteration\r
-\r
- if nextchar == '"':\r
- return parse_string(string, idx + 1, encoding, strict)\r
- elif nextchar == '{':\r
- return parse_object((string, idx + 1), encoding, strict,\r
- _scan_once, object_hook, object_pairs_hook)\r
- elif nextchar == '[':\r
- return parse_array((string, idx + 1), _scan_once)\r
- elif nextchar == 'n' and string[idx:idx + 4] == 'null':\r
- return None, idx + 4\r
- elif nextchar == 't' and string[idx:idx + 4] == 'true':\r
- return True, idx + 4\r
- elif nextchar == 'f' and string[idx:idx + 5] == 'false':\r
- return False, idx + 5\r
-\r
- m = match_number(string, idx)\r
- if m is not None:\r
- integer, frac, exp = m.groups()\r
- if frac or exp:\r
- res = parse_float(integer + (frac or '') + (exp or ''))\r
- else:\r
- res = parse_int(integer)\r
- return res, m.end()\r
- elif nextchar == 'N' and string[idx:idx + 3] == 'NaN':\r
- return parse_constant('NaN'), idx + 3\r
- elif nextchar == 'I' and string[idx:idx + 8] == 'Infinity':\r
- return parse_constant('Infinity'), idx + 8\r
- elif nextchar == '-' and string[idx:idx + 9] == '-Infinity':\r
- return parse_constant('-Infinity'), idx + 9\r
- else:\r
- raise StopIteration\r
-\r
- return _scan_once\r
-\r
-make_scanner = c_make_scanner or py_make_scanner\r