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| author | Mark Dickinson <dickinsm@gmail.com> | 2008-04-30 23:30:57 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2008-04-30 23:30:57 (GMT) |
| commit | a0de26c3427b63efcd0a678c5d686b4df9f105e4 (patch) | |
| tree | 359d9467600c47eb14c3a1926e6a9ebda7720bb3 /Modules/mathmodule.c | |
| parent | 3cbf15f07a72c1dad2196975448ce18725f18c08 (diff) | |
| download | cpython-a0de26c3427b63efcd0a678c5d686b4df9f105e4.zip cpython-a0de26c3427b63efcd0a678c5d686b4df9f105e4.tar.gz cpython-a0de26c3427b63efcd0a678c5d686b4df9f105e4.tar.bz2 | |
Make floating-point exception error messages slightly more verbose: in
particular, the error message now allows one to distinguish between a
ValueError arising from a singularity (e.g. log(0.)), which would
usually produce +-infinity in non-stop mode, and a ValueError resulting
from an invalid input (e.g. sqrt(-1.)), which would normally produce a
NaN in non-stop mode.
Diffstat (limited to 'Modules/mathmodule.c')
| -rw-r--r-- | Modules/mathmodule.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c index 3cf1133..aa38691 100644 --- a/Modules/mathmodule.c +++ b/Modules/mathmodule.c @@ -174,18 +174,21 @@ math_1_to_whatever(PyObject *arg, double (*func) (double), PyFPE_START_PROTECT("in math_1", return 0); r = (*func)(x); PyFPE_END_PROTECT(r); - if (Py_IS_NAN(r)) { - if (!Py_IS_NAN(x)) - errno = EDOM; - else - errno = 0; + if (Py_IS_NAN(r) && !Py_IS_NAN(x)) { + PyErr_SetString(PyExc_ValueError, + "math domain error (invalid argument)"); + return NULL; } - else if (Py_IS_INFINITY(r)) { - if (Py_IS_FINITE(x)) - errno = can_overflow ? ERANGE : EDOM; - else - errno = 0; + if (Py_IS_INFINITY(r) && Py_IS_FINITE(x)) { + if (can_overflow) + PyErr_SetString(PyExc_OverflowError, + "math range error (overflow)"); + else + PyErr_SetString(PyExc_ValueError, + "math domain error (singularity)"); + return NULL; } + /* on most machines, errno should be 0 at this point */ if (errno && is_error(r)) return NULL; else |