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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.6)
-
- '''Implementation of JSONDecoder
- '''
- import re
- import sys
- from json.scanner import Scanner, pattern
-
- try:
- from _json import scanstring as c_scanstring
- except ImportError:
- c_scanstring = None
-
- __all__ = [
- 'JSONDecoder']
- FLAGS = re.VERBOSE | re.MULTILINE | re.DOTALL
- NaN = float('nan')
- PosInf = float('inf')
- NegInf = float('-inf')
-
- def linecol(doc, pos):
- lineno = doc.count('\n', 0, pos) + 1
- if lineno == 1:
- colno = pos
- else:
- colno = pos - doc.rindex('\n', 0, pos)
- return (lineno, colno)
-
-
- def errmsg(msg, doc, pos, end = None):
- (lineno, colno) = linecol(doc, pos)
- if end is None:
- fmt = '{0}: line {1} column {2} (char {3})'
- return fmt.format(msg, lineno, colno, pos)
- (endlineno, endcolno) = linecol(doc, end)
- fmt = '{0}: line {1} column {2} - line {3} column {4} (char {5} - {6})'
- return fmt.format(msg, lineno, colno, endlineno, endcolno, pos, end)
-
- _CONSTANTS = {
- '-Infinity': NegInf,
- 'Infinity': PosInf,
- 'NaN': NaN,
- 'true': True,
- 'false': False,
- 'null': None }
-
- def JSONConstant(match, context, c = _CONSTANTS):
- s = match.group(0)
- fn = getattr(context, 'parse_constant', None)
- if fn is None:
- rval = c[s]
- else:
- rval = fn(s)
- return (rval, None)
-
- pattern('(-?Infinity|NaN|true|false|null)')(JSONConstant)
-
- def JSONNumber(match, context):
- match = JSONNumber.regex.match(match.string, *match.span())
- (integer, frac, exp) = match.groups()
- if frac or exp:
- if not getattr(context, 'parse_float', None):
- pass
- fn = float
- if not frac:
- pass
- if not exp:
- pass
- res = fn(integer + '' + '')
- elif not getattr(context, 'parse_int', None):
- pass
- fn = int
- res = fn(integer)
- return (res, None)
-
- pattern('(-?(?:0|[1-9]\\d*))(\\.\\d+)?([eE][-+]?\\d+)?')(JSONNumber)
- STRINGCHUNK = re.compile('(.*?)(["\\\\\\x00-\\x1f])', FLAGS)
- BACKSLASH = {
- '"': u'"',
- '\\': u'\\',
- '/': u'/',
- 'b': u'\x08',
- 'f': u'\x0c',
- 'n': u'\n',
- 'r': u'\r',
- 't': u'\t' }
- DEFAULT_ENCODING = 'utf-8'
-
- def py_scanstring(s, end, encoding = None, strict = True, _b = BACKSLASH, _m = STRINGCHUNK.match):
- if encoding is None:
- encoding = DEFAULT_ENCODING
-
- chunks = []
- _append = chunks.append
- begin = end - 1
- while None:
- chunk = _m(s, end)
- if chunk is None:
- raise ValueError(errmsg('Unterminated string starting at', s, begin))
- end = chunk.end()
- (content, terminator) = chunk.groups()
- if content:
- if not isinstance(content, unicode):
- content = unicode(content, encoding)
-
- _append(content)
-
- if terminator == '"':
- break
- elif terminator != '\\':
- if strict:
- msg = 'Invalid control character {0!r} at'.format(terminator)
- raise ValueError(errmsg(msg, s, end))
- strict
- _append(terminator)
- continue
-
-
- try:
- esc = s[end]
- except IndexError:
- raise ValueError(errmsg('Unterminated string starting at', s, begin))
-
- if esc != 'u':
-
- try:
- m = _b[esc]
- except KeyError:
- msg = 'Invalid \\escape: {0!r}'.format(esc)
- raise ValueError(errmsg(msg, s, end))
-
- end += 1
- else:
- esc = s[end + 1:end + 5]
- next_end = end + 5
- msg = 'Invalid \\uXXXX escape'
-
- try:
- if len(esc) != 4:
- raise ValueError
- len(esc) != 4
- uni = int(esc, 16)
- if uni <= uni:
- pass
- elif uni <= 56319 and sys.maxunicode > 65535:
- msg = 'Invalid \\uXXXX\\uXXXX surrogate pair'
- if not s[end + 5:end + 7] == '\\u':
- raise ValueError
- s[end + 5:end + 7] == '\\u'
- esc2 = s[end + 7:end + 11]
- if len(esc2) != 4:
- raise ValueError
- len(esc2) != 4
- uni2 = int(esc2, 16)
- uni = 65536 + (uni - 55296 << 10 | uni2 - 56320)
- next_end += 6
-
- m = unichr(uni)
- except ValueError:
- raise ValueError(errmsg(msg, s, end))
-
- end = next_end
- _append(m)
- continue
- return (u''.join(chunks), end)
-
- if c_scanstring is not None:
- scanstring = c_scanstring
- else:
- scanstring = py_scanstring
-
- def JSONString(match, context):
- encoding = getattr(context, 'encoding', None)
- strict = getattr(context, 'strict', True)
- return scanstring(match.string, match.end(), encoding, strict)
-
- pattern('"')(JSONString)
- WHITESPACE = re.compile('\\s*', FLAGS)
-
- def JSONObject(match, context, _w = WHITESPACE.match):
- pairs = { }
- s = match.string
- end = _w(s, match.end()).end()
- nextchar = s[end:end + 1]
- if nextchar == '}':
- return (pairs, end + 1)
- if nextchar != '"':
- raise ValueError(errmsg('Expecting property name', s, end))
- nextchar != '"'
- end += 1
- encoding = getattr(context, 'encoding', None)
- strict = getattr(context, 'strict', True)
- iterscan = JSONScanner.iterscan
- while True:
- (key, end) = scanstring(s, end, encoding, strict)
- end = _w(s, end).end()
- if s[end:end + 1] != ':':
- raise ValueError(errmsg('Expecting : delimiter', s, end))
- s[end:end + 1] != ':'
- end = _w(s, end + 1).end()
-
- try:
- (value, end) = iterscan(s, idx = end, context = context).next()
- except StopIteration:
- nextchar == '}'
- nextchar == '}'
- raise ValueError(errmsg('Expecting object', s, end))
- except:
- nextchar == '}'
-
- pairs[key] = value
- end = _w(s, end).end()
- nextchar = s[end:end + 1]
- end += 1
- if nextchar == '}':
- break
-
- if nextchar != ',':
- raise ValueError(errmsg('Expecting , delimiter', s, end - 1))
- nextchar != ','
- end = _w(s, end).end()
- nextchar = s[end:end + 1]
- end += 1
- if nextchar != '"':
- raise ValueError(errmsg('Expecting property name', s, end - 1))
- nextchar != '"'
- object_hook = getattr(context, 'object_hook', None)
- if object_hook is not None:
- pairs = object_hook(pairs)
-
- return (pairs, end)
-
- pattern('{')(JSONObject)
-
- def JSONArray(match, context, _w = WHITESPACE.match):
- values = []
- s = match.string
- end = _w(s, match.end()).end()
- nextchar = s[end:end + 1]
- if nextchar == ']':
- return (values, end + 1)
- iterscan = JSONScanner.iterscan
- while True:
-
- try:
- (value, end) = iterscan(s, idx = end, context = context).next()
- except StopIteration:
- nextchar == ']'
- nextchar == ']'
- raise ValueError(errmsg('Expecting object', s, end))
- except:
- nextchar == ']'
-
- values.append(value)
- end = _w(s, end).end()
- nextchar = s[end:end + 1]
- end += 1
- if nextchar == ']':
- break
-
- if nextchar != ',':
- raise ValueError(errmsg('Expecting , delimiter', s, end))
- nextchar != ','
- end = _w(s, end).end()
- return (values, end)
-
- pattern('\\[')(JSONArray)
- ANYTHING = [
- JSONObject,
- JSONArray,
- JSONString,
- JSONConstant,
- JSONNumber]
- JSONScanner = Scanner(ANYTHING)
-
- class JSONDecoder(object):
- '''Simple JSON <http://json.org> decoder
-
- Performs the following translations in decoding by default:
-
- +---------------+-------------------+
- | JSON | Python |
- +===============+===================+
- | object | dict |
- +---------------+-------------------+
- | array | list |
- +---------------+-------------------+
- | string | unicode |
- +---------------+-------------------+
- | number (int) | int, long |
- +---------------+-------------------+
- | number (real) | float |
- +---------------+-------------------+
- | true | True |
- +---------------+-------------------+
- | false | False |
- +---------------+-------------------+
- | null | None |
- +---------------+-------------------+
-
- It also understands ``NaN``, ``Infinity``, and ``-Infinity`` as
- their corresponding ``float`` values, which is outside the JSON spec.
- '''
- _scanner = Scanner(ANYTHING)
- __all__ = [
- '__init__',
- 'decode',
- 'raw_decode']
-
- def __init__(self, encoding = None, object_hook = None, parse_float = None, parse_int = None, parse_constant = None, strict = True):
- '''``encoding`` determines the encoding used to interpret any ``str``
- objects decoded by this instance (utf-8 by default). It has no
- effect when decoding ``unicode`` objects.
-
- Note that currently only encodings that are a superset of ASCII work,
- strings of other encodings should be passed in as ``unicode``.
-
- ``object_hook``, if specified, will be called with the result of
- every JSON object decoded and its return value will be used in
- place of the given ``dict``. This can be used to provide custom
- deserializations (e.g. to support JSON-RPC class hinting).
-
- ``parse_float``, if specified, will be called with the string
- of every JSON float to be decoded. By default this is equivalent to
- float(num_str). This can be used to use another datatype or parser
- for JSON floats (e.g. decimal.Decimal).
-
- ``parse_int``, if specified, will be called with the string
- of every JSON int to be decoded. By default this is equivalent to
- int(num_str). This can be used to use another datatype or parser
- for JSON integers (e.g. float).
-
- ``parse_constant``, if specified, will be called with one of the
- following strings: -Infinity, Infinity, NaN, null, true, false.
- This can be used to raise an exception if invalid JSON numbers
- are encountered.
-
- '''
- self.encoding = encoding
- self.object_hook = object_hook
- self.parse_float = parse_float
- self.parse_int = parse_int
- self.parse_constant = parse_constant
- self.strict = strict
-
-
- def decode(self, s, _w = WHITESPACE.match):
- '''
- Return the Python representation of ``s`` (a ``str`` or ``unicode``
- instance containing a JSON document)
-
- '''
- (obj, end) = self.raw_decode(s, idx = _w(s, 0).end())
- end = _w(s, end).end()
- if end != len(s):
- raise ValueError(errmsg('Extra data', s, end, len(s)))
- end != len(s)
- return obj
-
-
- def raw_decode(self, s, **kw):
- '''Decode a JSON document from ``s`` (a ``str`` or ``unicode`` beginning
- with a JSON document) and return a 2-tuple of the Python
- representation and the index in ``s`` where the document ended.
-
- This can be used to decode a JSON document from a string that may
- have extraneous data at the end.
-
- '''
- kw.setdefault('context', self)
-
- try:
- (obj, end) = self._scanner.iterscan(s, **kw).next()
- except StopIteration:
- raise ValueError('No JSON object could be decoded')
-
- return (obj, end)
-
-
-