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gh-129813: Use PyBytesWriter in _json:_match_number_unicode #138957

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gh-129813: Use PyBytesWriter in _json:_match_number_unicode #138957

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13 changes: 9 additions & 4 deletions Modules/_json.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1092,17 +1092,22 @@ _match_number_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t start, Py_
/* Straight conversion to ASCII, to avoid costly conversion of
decimal unicode digits (which cannot appear here) */
n = idx - start;
numstr = PyBytes_FromStringAndSize(NULL, n);
if (numstr == NULL)
PyBytesWriter *writer = PyBytesWriter_Create(n);
if (writer == NULL) {
return NULL;
buf = PyBytes_AS_STRING(numstr);
}
buf = PyBytesWriter_GetData(writer);
for (i = 0; i < n; i++) {
buf[i] = (char) PyUnicode_READ(kind, str, i + start);
}
numstr = PyBytesWriter_Finish(writer);
if (numstr == NULL) {
return NULL;
}
if (is_float)
rval = PyFloat_FromString(numstr);
else
rval = PyLong_FromString(buf, NULL, 10);
rval = PyLong_FromString(PyBytes_AS_STRING(numstr), NULL, 10);
}
Py_DECREF(numstr);
*next_idx_ptr = idx;
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