cpython/Modules/_testcapi/float.c at main · python/cpython · GitHub

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// clinic/float.c.h uses internal pycore_modsupport.h API
#definePYTESTCAPI_NEED_INTERNAL_API

#include"parts.h"
#include"util.h"
#include"clinic/float.c.h"


/*[clinic input]
module _testcapi
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=6361033e795369fc]*/

/*[clinic input]
_testcapi.float_pack

 size: int
 d: double
 le: int
 /

Test PyFloat_Pack2(), PyFloat_Pack4() and PyFloat_Pack8()
[clinic start generated code]*/

staticPyObject*
_testcapi_float_pack_impl(PyObject*module, intsize, doubled, intle)
/*[clinic end generated code: output=7899bd98f8b6cb04 input=52c9115121999c98]*/
{
switch (size)
 {
case2:
 {
chardata[2];
if (PyFloat_Pack2(d, data, le) <0) {
returnNULL;
 }
returnPyBytes_FromStringAndSize(data, Py_ARRAY_LENGTH(data));
 }
case4:
 {
chardata[4];
if (PyFloat_Pack4(d, data, le) <0) {
returnNULL;
 }
returnPyBytes_FromStringAndSize(data, Py_ARRAY_LENGTH(data));
 }
case8:
 {
chardata[8];
if (PyFloat_Pack8(d, data, le) <0) {
returnNULL;
 }
returnPyBytes_FromStringAndSize(data, Py_ARRAY_LENGTH(data));
 }
default: break;
 }

PyErr_SetString(PyExc_ValueError, "size must 2, 4 or 8");
returnNULL;
}


/*[clinic input]
_testcapi.float_unpack

 data: str(accept={robuffer}, zeroes=True)
 le: int
 /

Test PyFloat_Unpack2(), PyFloat_Unpack4() and PyFloat_Unpack8()
[clinic start generated code]*/

staticPyObject*
_testcapi_float_unpack_impl(PyObject*module, constchar*data,
Py_ssize_tdata_length, intle)
/*[clinic end generated code: output=617059f889ddbfe4 input=c095e4bb75a696cd]*/
{
assert(!PyErr_Occurred());
doubled;
switch (data_length)
 {
case2:
d=PyFloat_Unpack2(data, le);
break;
case4:
d=PyFloat_Unpack4(data, le);
break;
case8:
d=PyFloat_Unpack8(data, le);
break;
default:
PyErr_SetString(PyExc_ValueError, "data length must 2, 4 or 8 bytes");
returnNULL;
 }

if (d==-1.0&&PyErr_Occurred()) {
returnNULL;
 }
returnPyFloat_FromDouble(d);
}


/* Test PyOS_string_to_double. */
staticPyObject*
test_string_to_double(PyObject*self, PyObject*Py_UNUSED(ignored))
{
doubleresult;
constchar*msg;

#defineCHECK_STRING(STR, expected) \
 do { \
 result = PyOS_string_to_double(STR, NULL, NULL); \
 if (result == -1.0 && PyErr_Occurred()) { \
 return NULL; \
 } \
 if (result != (double)expected) { \
 msg = "conversion of " STR " to float failed"; \
 goto fail; \
 } \
 } while (0)

#defineCHECK_INVALID(STR) \
 do { \
 result = PyOS_string_to_double(STR, NULL, NULL); \
 if (result == -1.0 && PyErr_Occurred()) { \
 if (PyErr_ExceptionMatches(PyExc_ValueError)) { \
 PyErr_Clear(); \
 } \
 else { \
 return NULL; \
 } \
 } \
 else { \
 msg = "conversion of " STR " didn't raise ValueError"; \
 goto fail; \
 } \
 } while (0)

CHECK_STRING("0.1", 0.1);
CHECK_STRING("1.234", 1.234);
CHECK_STRING("-1.35", -1.35);
CHECK_STRING(".1e01", 1.0);
CHECK_STRING("2.e-2", 0.02);

CHECK_INVALID(" 0.1");
CHECK_INVALID("\t\n-3");
CHECK_INVALID(".123 ");
CHECK_INVALID("3\n");
CHECK_INVALID("123abc");

Py_RETURN_NONE;
fail:
PyErr_Format(PyExc_AssertionError, "test_string_to_double: %s", msg);
returnNULL;
#undef CHECK_STRING
#undef CHECK_INVALID
}


staticPyMethodDeftest_methods[] = {
_TESTCAPI_FLOAT_PACK_METHODDEF
_TESTCAPI_FLOAT_UNPACK_METHODDEF
 {"test_string_to_double", test_string_to_double, METH_NOARGS},
 {NULL},
};

int
_PyTestCapi_Init_Float(PyObject*mod)
{
if (PyModule_AddFunctions(mod, test_methods) <0) {
return-1;
 }

#if (defined(__mips__) && !defined(__mips_nan2008)) || defined(__hppa__)
returnPyModule_Add(mod, "nan_msb_is_signaling", PyBool_FromLong(1));
#else
returnPyModule_Add(mod, "nan_msb_is_signaling", PyBool_FromLong(0));
#endif
}