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gh-110819: Fix ‘kind’ may be used uninitialized warning in longobject #116599

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merged 3 commits into from
Mar 12, 2024
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gh-110819: Fix ‘kind’ may be used uninitialized warning in longobject #116599

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gh-116592: Fix ‘kind’ may be used uninitialized warning in `longobject`
sobolevn Mar 11, 2024
2e28cda
Address review
sobolevn Mar 12, 2024
4ebe67b
Address review
sobolevn Mar 12, 2024
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63 changes: 35 additions & 28 deletions Objects/longobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1965,7 +1965,9 @@ long_to_decimal_string_internal(PyObject *aa,
digit *pout, *pin, rem, tenpow;
int negative;
int d;
int kind;

// writer or bytes_writer can be used, but not both at the same time.
assert(writer == NULL || bytes_writer == NULL);

a = (PyLongObject *)aa;
if (a == NULL || !PyLong_Check(a)) {
Expand Down Expand Up @@ -2078,7 +2080,6 @@ long_to_decimal_string_internal(PyObject *aa,
Py_DECREF(scratch);
return -1;
}
kind = writer->kind;
}
else if (bytes_writer) {
*bytes_str = _PyBytesWriter_Prepare(bytes_writer, *bytes_str, strlen);
Expand All @@ -2093,7 +2094,6 @@ long_to_decimal_string_internal(PyObject *aa,
Py_DECREF(scratch);
return -1;
}
kind = PyUnicode_KIND(str);
}

#define WRITE_DIGITS(p) \
Expand Down Expand Up @@ -2141,19 +2141,23 @@ long_to_decimal_string_internal(PyObject *aa,
WRITE_DIGITS(p);
assert(p == *bytes_str);
}
else if (kind == PyUnicode_1BYTE_KIND) {
Py_UCS1 *p;
WRITE_UNICODE_DIGITS(Py_UCS1);
}
else if (kind == PyUnicode_2BYTE_KIND) {
Py_UCS2 *p;
WRITE_UNICODE_DIGITS(Py_UCS2);
}
else {
Py_UCS4 *p;
assert (kind == PyUnicode_4BYTE_KIND);
WRITE_UNICODE_DIGITS(Py_UCS4);
int kind = writer ? writer->kind : PyUnicode_KIND(str);
if (kind == PyUnicode_1BYTE_KIND) {
Py_UCS1 *p;
WRITE_UNICODE_DIGITS(Py_UCS1);
}
else if (kind == PyUnicode_2BYTE_KIND) {
Py_UCS2 *p;
WRITE_UNICODE_DIGITS(Py_UCS2);
}
else {
assert (kind == PyUnicode_4BYTE_KIND);
Py_UCS4 *p;
WRITE_UNICODE_DIGITS(Py_UCS4);
}
}

#undef WRITE_DIGITS
#undef WRITE_UNICODE_DIGITS

Expand Down Expand Up @@ -2194,11 +2198,12 @@ long_format_binary(PyObject *aa, int base, int alternate,
PyObject *v = NULL;
Py_ssize_t sz;
Py_ssize_t size_a;
int kind;
int negative;
int bits;

assert(base == 2 || base == 8 || base == 16);
// writer or bytes_writer can be used, but not both at the same time.
assert(writer == NULL || bytes_writer == NULL);
if (a == NULL || !PyLong_Check(a)) {
PyErr_BadInternalCall();
return -1;
Expand Down Expand Up @@ -2246,7 +2251,6 @@ long_format_binary(PyObject *aa, int base, int alternate,
if (writer) {
if (_PyUnicodeWriter_Prepare(writer, sz, 'x') == -1)
return -1;
kind = writer->kind;
}
else if (bytes_writer) {
*bytes_str = _PyBytesWriter_Prepare(bytes_writer, *bytes_str, sz);
Expand All @@ -2257,7 +2261,6 @@ long_format_binary(PyObject *aa, int base, int alternate,
v = PyUnicode_New(sz, 'x');
if (v == NULL)
return -1;
kind = PyUnicode_KIND(v);
}

#define WRITE_DIGITS(p) \
Expand Down Expand Up @@ -2318,19 +2321,23 @@ long_format_binary(PyObject *aa, int base, int alternate,
WRITE_DIGITS(p);
assert(p == *bytes_str);
}
else if (kind == PyUnicode_1BYTE_KIND) {
Py_UCS1 *p;
WRITE_UNICODE_DIGITS(Py_UCS1);
}
else if (kind == PyUnicode_2BYTE_KIND) {
Py_UCS2 *p;
WRITE_UNICODE_DIGITS(Py_UCS2);
}
else {
Py_UCS4 *p;
assert (kind == PyUnicode_4BYTE_KIND);
WRITE_UNICODE_DIGITS(Py_UCS4);
int kind = writer ? writer->kind : PyUnicode_KIND(v);
if (kind == PyUnicode_1BYTE_KIND) {
Py_UCS1 *p;
WRITE_UNICODE_DIGITS(Py_UCS1);
}
else if (kind == PyUnicode_2BYTE_KIND) {
Py_UCS2 *p;
WRITE_UNICODE_DIGITS(Py_UCS2);
}
else {
assert (kind == PyUnicode_4BYTE_KIND);
Py_UCS4 *p;
WRITE_UNICODE_DIGITS(Py_UCS4);
}
}

#undef WRITE_DIGITS
#undef WRITE_UNICODE_DIGITS

Expand Down