mirror of
https://github.com/python/cpython.git
synced 2025-11-04 03:44:55 +00:00
72f98e9b83
Store floats and doubles to full precision in marshal. Test that floats read from .pyc/.pyo closely match those read from .py. Declare PyFloat_AsString() in floatobject header file. Add new PyFloat_AsReprString() API function. Document the functions declared in floatobject.h.
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
|
|
/* Float object interface */
|
|
|
|
/*
|
|
PyFloatObject represents a (double precision) floating point number.
|
|
*/
|
|
|
|
#ifndef Py_FLOATOBJECT_H
|
|
#define Py_FLOATOBJECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
double ob_fval;
|
|
} PyFloatObject;
|
|
|
|
extern DL_IMPORT(PyTypeObject) PyFloat_Type;
|
|
|
|
#define PyFloat_Check(op) ((op)->ob_type == &PyFloat_Type)
|
|
|
|
/* 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);
|
|
|
|
/* 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
|
|
#endif /* !Py_FLOATOBJECT_H */
|