Backport of PEP 3101, Advanced String Formatting, from py3k.
Highlights:
- Adding PyObject_Format.
- Adding string.Format class.
- Adding __format__ for str, unicode, int, long, float, datetime.
- Adding builtin format.
- Adding ''.format and u''.format.
- str/unicode fixups for formatters.
The files in Objects/stringlib that implement PEP 3101 (stringdefs.h,
unicodedefs.h, formatter.h, string_format.h) are identical in trunk
and py3k. Any changes from here on should be made to trunk, and
changes will propogate to py3k).
diff --git a/Objects/intobject.c b/Objects/intobject.c
index 2fdea25..65c1c23 100644
--- a/Objects/intobject.c
+++ b/Objects/intobject.c
@@ -3,6 +3,7 @@
#include "Python.h"
#include <ctype.h>
+#include "formatter_string.h"
static PyObject *int_int(PyIntObject *v);
@@ -1108,12 +1109,47 @@
return PyString_FromStringAndSize(p, &buf[sizeof(buf)] - p);
}
+static PyObject *
+int__format__(PyObject *self, PyObject *args)
+{
+ PyObject *format_spec;
+
+ if (!PyArg_ParseTuple(args, "O:__format__", &format_spec))
+ return NULL;
+ if (PyString_Check(format_spec))
+ return string_int__format__(self, args);
+ if (PyUnicode_Check(format_spec)) {
+ /* Convert format_spec to a str */
+ PyObject *result = NULL;
+ PyObject *newargs = NULL;
+ PyObject *string_format_spec = NULL;
+
+ string_format_spec = PyObject_Str(format_spec);
+ if (string_format_spec == NULL)
+ goto done;
+
+ newargs = Py_BuildValue("(O)", string_format_spec);
+ if (newargs == NULL)
+ goto done;
+
+ result = string_int__format__(self, newargs);
+
+ done:
+ Py_XDECREF(string_format_spec);
+ Py_XDECREF(newargs);
+ return result;
+ }
+ PyErr_SetString(PyExc_TypeError, "__format__ requires str or unicode");
+ return NULL;
+}
+
static PyMethodDef int_methods[] = {
{"conjugate", (PyCFunction)int_int, METH_NOARGS,
"Returns self, the complex conjugate of any int."},
{"__trunc__", (PyCFunction)int_int, METH_NOARGS,
"Truncating an Integral returns itself."},
{"__getnewargs__", (PyCFunction)int_getnewargs, METH_NOARGS},
+ {"__format__", (PyCFunction)int__format__, METH_VARARGS},
{NULL, NULL} /* sentinel */
};