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interpolationobject.c
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231 lines (201 loc) · 6.95 KB
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/* t-string Interpolation object implementation */
#include "Python.h"
#include "pycore_initconfig.h" // _PyStatus_OK
#include "pycore_interpolation.h"
#include "pycore_typeobject.h" // _PyType_GetDict
static int
_conversion_converter(PyObject *arg, PyObject **conversion)
{
if (arg == Py_None) {
return 1;
}
if (!PyUnicode_Check(arg)) {
PyErr_Format(PyExc_TypeError,
"Interpolation() argument 'conversion' must be str, not %T",
arg);
return 0;
}
Py_ssize_t len;
const char *conv_str = PyUnicode_AsUTF8AndSize(arg, &len);
if (len != 1 || !(conv_str[0] == 'a' || conv_str[0] == 'r' || conv_str[0] == 's')) {
PyErr_SetString(PyExc_ValueError,
"Interpolation() argument 'conversion' must be one of 's', 'a' or 'r'");
return 0;
}
*conversion = arg;
return 1;
}
#include "clinic/interpolationobject.c.h"
/*[clinic input]
class Interpolation "interpolationobject *" "&_PyInterpolation_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=161c64a16f9c4544]*/
typedef struct {
PyObject_HEAD
PyObject *value;
PyObject *expression;
PyObject *conversion;
PyObject *format_spec;
} interpolationobject;
#define interpolationobject_CAST(op) \
(assert(_PyInterpolation_CheckExact(op)), _Py_CAST(interpolationobject*, (op)))
/*[clinic input]
@classmethod
Interpolation.__new__ as interpolation_new
value: object
expression: object(subclass_of='&PyUnicode_Type', c_default='&_Py_STR(empty)') = ""
conversion: object(converter='_conversion_converter') = None
format_spec: object(subclass_of='&PyUnicode_Type', c_default='&_Py_STR(empty)') = ""
[clinic start generated code]*/
static PyObject *
interpolation_new_impl(PyTypeObject *type, PyObject *value,
PyObject *expression, PyObject *conversion,
PyObject *format_spec)
/*[clinic end generated code: output=6488e288765bc1a9 input=fc5c285c1dd23d36]*/
{
interpolationobject *self = PyObject_GC_New(interpolationobject, type);
if (!self) {
return NULL;
}
self->value = Py_NewRef(value);
self->expression = Py_NewRef(expression);
self->conversion = Py_NewRef(conversion);
self->format_spec = Py_NewRef(format_spec);
PyObject_GC_Track(self);
return (PyObject *) self;
}
static void
interpolation_dealloc(PyObject *op)
{
PyObject_GC_UnTrack(op);
Py_TYPE(op)->tp_clear(op);
Py_TYPE(op)->tp_free(op);
}
static int
interpolation_clear(PyObject *op)
{
interpolationobject *self = interpolationobject_CAST(op);
Py_CLEAR(self->value);
Py_CLEAR(self->expression);
Py_CLEAR(self->conversion);
Py_CLEAR(self->format_spec);
return 0;
}
static int
interpolation_traverse(PyObject *op, visitproc visit, void *arg)
{
interpolationobject *self = interpolationobject_CAST(op);
Py_VISIT(self->value);
Py_VISIT(self->expression);
Py_VISIT(self->conversion);
Py_VISIT(self->format_spec);
return 0;
}
static PyObject *
interpolation_repr(PyObject *op)
{
interpolationobject *self = interpolationobject_CAST(op);
return PyUnicode_FromFormat("%s(%R, %R, %R, %R)",
_PyType_Name(Py_TYPE(self)), self->value, self->expression,
self->conversion, self->format_spec);
}
static PyMemberDef interpolation_members[] = {
{"value", Py_T_OBJECT_EX, offsetof(interpolationobject, value), Py_READONLY, "Value"},
{"expression", Py_T_OBJECT_EX, offsetof(interpolationobject, expression), Py_READONLY, "Expression"},
{"conversion", Py_T_OBJECT_EX, offsetof(interpolationobject, conversion), Py_READONLY, "Conversion"},
{"format_spec", Py_T_OBJECT_EX, offsetof(interpolationobject, format_spec), Py_READONLY, "Format specifier"},
{NULL}
};
static PyObject*
interpolation_reduce(PyObject *op, PyObject *Py_UNUSED(dummy))
{
interpolationobject *self = interpolationobject_CAST(op);
return Py_BuildValue("(O(OOOO))", (PyObject *)Py_TYPE(op),
self->value, self->expression,
self->conversion, self->format_spec);
}
static PyMethodDef interpolation_methods[] = {
{"__reduce__", interpolation_reduce, METH_NOARGS,
PyDoc_STR("__reduce__() -> (cls, state)")},
{"__class_getitem__", Py_GenericAlias,
METH_O|METH_CLASS, PyDoc_STR("See PEP 585")},
{NULL, NULL},
};
PyTypeObject _PyInterpolation_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "string.templatelib.Interpolation",
.tp_doc = PyDoc_STR("Interpolation object"),
.tp_basicsize = sizeof(interpolationobject),
.tp_itemsize = 0,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
.tp_new = interpolation_new,
.tp_alloc = PyType_GenericAlloc,
.tp_dealloc = interpolation_dealloc,
.tp_clear = interpolation_clear,
.tp_free = PyObject_GC_Del,
.tp_repr = interpolation_repr,
.tp_members = interpolation_members,
.tp_methods = interpolation_methods,
.tp_traverse = interpolation_traverse,
};
PyStatus
_PyInterpolation_InitTypes(PyInterpreterState *interp)
{
PyObject *tuple = Py_BuildValue("(ssss)", "value", "expression", "conversion", "format_spec");
if (!tuple) {
goto error;
}
PyObject *dict = _PyType_GetDict(&_PyInterpolation_Type);
if (!dict) {
Py_DECREF(tuple);
goto error;
}
int status = PyDict_SetItemString(dict, "__match_args__", tuple);
Py_DECREF(tuple);
if (status < 0) {
goto error;
}
return _PyStatus_OK();
error:
return _PyStatus_ERR("Can't initialize interpolation types");
}
PyObject *
_PyInterpolation_Build(PyObject *value, PyObject *str, int conversion, PyObject *format_spec)
{
interpolationobject *interpolation = PyObject_GC_New(interpolationobject, &_PyInterpolation_Type);
if (!interpolation) {
return NULL;
}
interpolation->value = Py_NewRef(value);
interpolation->expression = Py_NewRef(str);
interpolation->format_spec = Py_NewRef(format_spec);
interpolation->conversion = NULL;
if (conversion == 0) {
interpolation->conversion = Py_None;
}
else {
switch (conversion) {
case FVC_ASCII:
interpolation->conversion = _Py_LATIN1_CHR('a');
break;
case FVC_REPR:
interpolation->conversion = _Py_LATIN1_CHR('r');
break;
case FVC_STR:
interpolation->conversion = _Py_LATIN1_CHR('s');
break;
default:
PyErr_SetString(PyExc_SystemError,
"Interpolation() argument 'conversion' must be one of 's', 'a' or 'r'");
Py_DECREF(interpolation);
return NULL;
}
}
PyObject_GC_Track(interpolation);
return (PyObject *) interpolation;
}
PyObject *
_PyInterpolation_GetValueRef(PyObject *interpolation)
{
return Py_NewRef(interpolationobject_CAST(interpolation)->value);
}