diff options
Diffstat (limited to 'Lib/json/decoder.py')
| -rw-r--r-- | Lib/json/decoder.py | 28 |
1 files changed, 10 insertions, 18 deletions
diff --git a/Lib/json/decoder.py b/Lib/json/decoder.py index 51c3aa7..da7ef9c 100644 --- a/Lib/json/decoder.py +++ b/Lib/json/decoder.py @@ -1,9 +1,6 @@ """Implementation of JSONDecoder """ -import binascii import re -import sys -import struct from json import scanner try: @@ -15,14 +12,9 @@ __all__ = ['JSONDecoder'] FLAGS = re.VERBOSE | re.MULTILINE | re.DOTALL -def _floatconstants(): - _BYTES = binascii.unhexlify(b'7FF80000000000007FF0000000000000') - if sys.byteorder != 'big': - _BYTES = _BYTES[:8][::-1] + _BYTES[8:][::-1] - nan, inf = struct.unpack('dd', _BYTES) - return nan, inf, -inf - -NaN, PosInf, NegInf = _floatconstants() +NaN = float('nan') +PosInf = float('inf') +NegInf = float('-inf') def linecol(doc, pos): @@ -196,8 +188,8 @@ def JSONObject(s_and_end, strict, scan_once, object_hook, object_pairs_hook, try: value, end = scan_once(s, end) - except StopIteration: - raise ValueError(errmsg("Expecting object", s, end)) + except StopIteration as err: + raise ValueError(errmsg("Expecting value", s, err.value)) from None pairs_append((key, value)) try: nextchar = s[end] @@ -240,8 +232,8 @@ def JSONArray(s_and_end, scan_once, _w=WHITESPACE.match, _ws=WHITESPACE_STR): while True: try: value, end = scan_once(s, end) - except StopIteration: - raise ValueError(errmsg("Expecting object", s, end)) + except StopIteration as err: + raise ValueError(errmsg("Expecting value", s, err.value)) from None _append(value) nextchar = s[end:end + 1] if nextchar in _ws: @@ -251,7 +243,7 @@ def JSONArray(s_and_end, scan_once, _w=WHITESPACE.match, _ws=WHITESPACE_STR): if nextchar == ']': break elif nextchar != ',': - raise ValueError(errmsg("Expecting ',' delimiter", s, end)) + raise ValueError(errmsg("Expecting ',' delimiter", s, end - 1)) try: if s[end] in _ws: end += 1 @@ -366,6 +358,6 @@ class JSONDecoder(object): """ try: obj, end = self.scan_once(s, idx) - except StopIteration: - raise ValueError("No JSON object could be decoded") + except StopIteration as err: + raise ValueError(errmsg("Expecting value", s, err.value)) from None return obj, end |