static PyObject *
complex_subtype_from_string(PyTypeObject *type, PyObject *v)
{
const char *s;
PyObject *s_buffer = NULL, *result = NULL;
Py_ssize_t len;
if (PyUnicode_Check(v)) {
s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
if (s_buffer == NULL) {
return NULL;
}
assert(PyUnicode_IS_ASCII(s_buffer));
/* Simply get a pointer to existing ASCII characters. */
s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
assert(s != NULL);
}
else {
PyErr_Format(PyExc_TypeError,
"complex() argument must be a string or a number, not '%.200s'",
Py_TYPE(v)->tp_name);
return NULL;
}
result = _Py_string_to_number_with_underscores(s, len, "complex", v, type,
complex_from_string_inner);
Py_DECREF(s_buffer);
return result;
}
static PyObject *
complex_subtype_from_string(PyTypeObject *type, PyObject *v)
{
const char *s, *start;
char *end;
double x=0.0, y=0.0, z;
int got_bracket=0;
PyObject *s_buffer = NULL;
Py_ssize_t len;
Py_buffer view = {NULL, NULL};
if (PyUnicode_Check(v)) {
s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
if (s_buffer == NULL)
return NULL;
s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
if (s == NULL)
goto error;
}
else if (PyObject_GetBuffer(v, &view, PyBUF_SIMPLE) == 0) {
s = (const char *)view.buf;
len = view.len;
}
else {
PyErr_Format(PyExc_TypeError,
"complex() argument must be a string or a number, not '%.200s'",
Py_TYPE(v)->tp_name);
return NULL;
}
/* position on first nonblank */
start = s;
while (Py_ISSPACE(*s))
s++;
if (*s == '(') {
/* Skip over possible bracket from repr(). */
got_bracket = 1;
s++;
while (Py_ISSPACE(*s))
s++;
}
/* a valid complex string usually takes one of the three forms:
<float> - real part only
<float>j - imaginary part only
<float><signed-float>j - real and imaginary parts
where <float> represents any numeric string that's accepted by the
float constructor (including 'nan', 'inf', 'infinity', etc.), and
<signed-float> is any string of the form <float> whose first
character is '+' or '-'.
For backwards compatibility, the extra forms
<float><sign>j
<sign>j
j
are also accepted, though support for these forms may be removed from
a future version of Python.
*/
/* first look for forms starting with <float> */
z = PyOS_string_to_double(s, &end, NULL);
if (z == -1.0 && PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_ValueError))
PyErr_Clear();
else
goto error;
}
if (end != s) {
/* all 4 forms starting with <float> land here */
s = end;
if (*s == '+' || *s == '-') {
/* <float><signed-float>j | <float><sign>j */
x = z;
y = PyOS_string_to_double(s, &end, NULL);
if (y == -1.0 && PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_ValueError))
PyErr_Clear();
else
goto error;
}
if (end != s)
/* <float><signed-float>j */
s = end;
else {
/* <float><sign>j */
y = *s == '+' ? 1.0 : -1.0;
s++;
}
if (!(*s == 'j' || *s == 'J'))
goto parse_error;
s++;
}
else if (*s == 'j' || *s == 'J') {
/* <float>j */
s++;
y = z;
}
else
/* <float> */
x = z;
}
else {
/* not starting with <float>; must be <sign>j or j */
if (*s == '+' || *s == '-') {
/* <sign>j */
y = *s == '+' ? 1.0 : -1.0;
s++;
}
else
/* j */
y = 1.0;
if (!(*s == 'j' || *s == 'J'))
goto parse_error;
s++;
}
/* trailing whitespace and closing bracket */
while (Py_ISSPACE(*s))
s++;
if (got_bracket) {
/* if there was an opening parenthesis, then the corresponding
closing parenthesis should be right here */
if (*s != ')')
goto parse_error;
s++;
while (Py_ISSPACE(*s))
s++;
}
/* we should now be at the end of the string */
if (s-start != len)
goto parse_error;
PyBuffer_Release(&view);
Py_XDECREF(s_buffer);
return complex_subtype_from_doubles(type, x, y);
parse_error:
PyErr_SetString(PyExc_ValueError,
"complex() arg is a malformed string");
error:
PyBuffer_Release(&view);
Py_XDECREF(s_buffer);
return NULL;
}