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https://github.com/jart/cosmopolitan.git
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9b29358511
Status lines for Emacs and Vim have been added to Python sources so they'll be easier to edit using Python's preferred coding style. Some DNS helper functions have been broken up into multiple files. It's nice to have one function per file whenever possible, since that way we don't need -ffunction-sections. Another reason it's good to have small source files, is because the build will be enforcing resource limits on compilation and testing soon.
215 lines
7.6 KiB
C++
215 lines
7.6 KiB
C++
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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/* clang-format off */
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/* Poor-man's template. Macros used:
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TESTNAME name of the test (like test_long_api_inner)
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TYPENAME the signed type (like long)
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F_S_TO_PY convert signed to pylong; TYPENAME -> PyObject*
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F_PY_TO_S convert pylong to signed; PyObject* -> TYPENAME
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F_U_TO_PY convert unsigned to pylong; unsigned TYPENAME -> PyObject*
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F_PY_TO_U convert pylong to unsigned; PyObject* -> unsigned TYPENAME
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*/
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static PyObject *
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TESTNAME(PyObject *error(const char*))
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{
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const int NBITS = sizeof(TYPENAME) * 8;
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unsigned TYPENAME base;
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PyObject *pyresult;
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int i;
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/* Note: This test lets PyObjects leak if an error is raised. Since
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an error should never be raised, leaks are impossible <wink>. */
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/* Test native -> PyLong -> native roundtrip identity.
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* Generate all powers of 2, and test them and their negations,
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* plus the numbers +-1 off from them.
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*/
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base = 1;
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for (i = 0;
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i < NBITS + 1; /* on last, base overflows to 0 */
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++i, base <<= 1)
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{
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int j;
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for (j = 0; j < 6; ++j) {
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TYPENAME in, out;
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unsigned TYPENAME uin, uout;
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/* For 0, 1, 2 use base; for 3, 4, 5 use -base */
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uin = j < 3 ? base : 0U - base;
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/* For 0 & 3, subtract 1.
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* For 1 & 4, leave alone.
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* For 2 & 5, add 1.
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*/
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uin += (unsigned TYPENAME)(TYPENAME)(j % 3 - 1);
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pyresult = F_U_TO_PY(uin);
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if (pyresult == NULL)
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return error(
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"unsigned unexpected null result");
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uout = F_PY_TO_U(pyresult);
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if (uout == (unsigned TYPENAME)-1 && PyErr_Occurred())
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return error(
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"unsigned unexpected -1 result");
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if (uout != uin)
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return error(
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"unsigned output != input");
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UNBIND(pyresult);
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in = (TYPENAME)uin;
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pyresult = F_S_TO_PY(in);
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if (pyresult == NULL)
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return error(
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"signed unexpected null result");
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out = F_PY_TO_S(pyresult);
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if (out == (TYPENAME)-1 && PyErr_Occurred())
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return error(
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"signed unexpected -1 result");
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if (out != in)
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return error(
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"signed output != input");
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UNBIND(pyresult);
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}
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}
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/* Overflow tests. The loop above ensured that all limit cases that
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* should not overflow don't overflow, so all we need to do here is
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* provoke one-over-the-limit cases (not exhaustive, but sharp).
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*/
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{
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PyObject *one, *x, *y;
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TYPENAME out;
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unsigned TYPENAME uout;
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one = PyLong_FromLong(1);
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if (one == NULL)
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return error(
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"unexpected NULL from PyLong_FromLong");
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/* Unsigned complains about -1? */
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x = PyNumber_Negative(one);
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if (x == NULL)
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return error(
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"unexpected NULL from PyNumber_Negative");
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uout = F_PY_TO_U(x);
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if (uout != (unsigned TYPENAME)-1 || !PyErr_Occurred())
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return error(
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"PyLong_AsUnsignedXXX(-1) didn't complain");
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if (!PyErr_ExceptionMatches(PyExc_OverflowError))
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return error(
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"PyLong_AsUnsignedXXX(-1) raised "
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"something other than OverflowError");
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PyErr_Clear();
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UNBIND(x);
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/* Unsigned complains about 2**NBITS? */
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y = PyLong_FromLong((long)NBITS);
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if (y == NULL)
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return error(
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"unexpected NULL from PyLong_FromLong");
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x = PyNumber_Lshift(one, y); /* 1L << NBITS, == 2**NBITS */
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UNBIND(y);
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if (x == NULL)
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return error(
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"unexpected NULL from PyNumber_Lshift");
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uout = F_PY_TO_U(x);
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if (uout != (unsigned TYPENAME)-1 || !PyErr_Occurred())
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return error(
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"PyLong_AsUnsignedXXX(2**NBITS) didn't "
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"complain");
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if (!PyErr_ExceptionMatches(PyExc_OverflowError))
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return error(
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"PyLong_AsUnsignedXXX(2**NBITS) raised "
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"something other than OverflowError");
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PyErr_Clear();
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/* Signed complains about 2**(NBITS-1)?
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x still has 2**NBITS. */
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y = PyNumber_Rshift(x, one); /* 2**(NBITS-1) */
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UNBIND(x);
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if (y == NULL)
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return error(
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"unexpected NULL from PyNumber_Rshift");
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out = F_PY_TO_S(y);
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if (out != (TYPENAME)-1 || !PyErr_Occurred())
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return error(
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"PyLong_AsXXX(2**(NBITS-1)) didn't "
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"complain");
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if (!PyErr_ExceptionMatches(PyExc_OverflowError))
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return error(
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"PyLong_AsXXX(2**(NBITS-1)) raised "
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"something other than OverflowError");
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PyErr_Clear();
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/* Signed complains about -2**(NBITS-1)-1?;
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y still has 2**(NBITS-1). */
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x = PyNumber_Negative(y); /* -(2**(NBITS-1)) */
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UNBIND(y);
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if (x == NULL)
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return error(
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"unexpected NULL from PyNumber_Negative");
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y = PyNumber_Subtract(x, one); /* -(2**(NBITS-1))-1 */
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UNBIND(x);
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if (y == NULL)
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return error(
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"unexpected NULL from PyNumber_Subtract");
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out = F_PY_TO_S(y);
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if (out != (TYPENAME)-1 || !PyErr_Occurred())
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return error(
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"PyLong_AsXXX(-2**(NBITS-1)-1) didn't "
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"complain");
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if (!PyErr_ExceptionMatches(PyExc_OverflowError))
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return error(
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"PyLong_AsXXX(-2**(NBITS-1)-1) raised "
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"something other than OverflowError");
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PyErr_Clear();
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UNBIND(y);
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Py_XDECREF(x);
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Py_XDECREF(y);
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Py_DECREF(one);
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}
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/* Test F_PY_TO_{S,U} on non-pylong input. This should raise a TypeError. */
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{
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TYPENAME out;
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unsigned TYPENAME uout;
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Py_INCREF(Py_None);
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out = F_PY_TO_S(Py_None);
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if (out != (TYPENAME)-1 || !PyErr_Occurred())
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return error("PyLong_AsXXX(None) didn't complain");
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if (!PyErr_ExceptionMatches(PyExc_TypeError))
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return error("PyLong_AsXXX(None) raised "
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"something other than TypeError");
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PyErr_Clear();
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uout = F_PY_TO_U(Py_None);
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if (uout != (unsigned TYPENAME)-1 || !PyErr_Occurred())
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return error("PyLong_AsXXX(None) didn't complain");
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if (!PyErr_ExceptionMatches(PyExc_TypeError))
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return error("PyLong_AsXXX(None) raised "
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"something other than TypeError");
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PyErr_Clear();
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Py_DECREF(Py_None);
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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