diff options
Diffstat (limited to 'Include/floatobject.h')
| -rw-r--r-- | Include/floatobject.h | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/Include/floatobject.h b/Include/floatobject.h index 1d0b50a..6e36a2f 100644 --- a/Include/floatobject.h +++ b/Include/floatobject.h @@ -20,13 +20,32 @@ extern DL_IMPORT(PyTypeObject) PyFloat_Type; #define PyFloat_Check(op) ((op)->ob_type == &PyFloat_Type) -extern DL_IMPORT(PyObject *) PyFloat_FromString(PyObject*, char**); +/* Return Python float from string PyObject. Second argument ignored on + input, and, if non-NULL, NULL is stored into *junk (this tried to serve a + purpose once but can't be made to work as intended). */ +extern DL_IMPORT(PyObject *) PyFloat_FromString(PyObject*, char** junk); + +/* Return Python float from C double. */ extern DL_IMPORT(PyObject *) PyFloat_FromDouble(double); -extern DL_IMPORT(double) PyFloat_AsDouble(PyObject *); -/* Macro, trading safety for speed */ +/* Extract C double from Python float. The macro version trades safety for + speed. */ +extern DL_IMPORT(double) PyFloat_AsDouble(PyObject *); #define PyFloat_AS_DOUBLE(op) (((PyFloatObject *)(op))->ob_fval) +/* Write repr(v) into the char buffer argument, followed by null byte. The + buffer must be "big enough"; >= 100 is very safe. + PyFloat_AsReprString(buf, x) strives to print enough digits so that + PyFloat_FromString(buf) then reproduces x exactly. */ +extern DL_IMPORT(void) PyFloat_AsReprString(char*, PyFloatObject *v); + +/* Write str(v) into the char buffer argument, followed by null byte. The + buffer must be "big enough"; >= 100 is very safe. Note that it's + unusual to be able to get back the float you started with from + PyFloat_AsString's result -- use PyFloat_AsReprString() if you want to + preserve precision across conversions. */ +extern DL_IMPORT(void) PyFloat_AsString(char*, PyFloatObject *v); + #ifdef __cplusplus } #endif |