mirror of
https://github.com/python/cpython.git
synced 2024-12-12 11:23:56 +08:00
2623c8c23c
The new syntax is highly human readable while still preventing false positives. The syntax also extends Python syntax to denote "self" and positional-only parameters, allowing inspect.Signature objects to be totally accurate for all supported builtins in Python 3.4.
558 lines
14 KiB
C
558 lines
14 KiB
C
|
|
/* DBM module using dictionary interface */
|
|
|
|
|
|
#define PY_SSIZE_T_CLEAN
|
|
#include "Python.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
/* Some Linux systems install gdbm/ndbm.h, but not ndbm.h. This supports
|
|
* whichever configure was able to locate.
|
|
*/
|
|
#if defined(HAVE_NDBM_H)
|
|
#include <ndbm.h>
|
|
static char *which_dbm = "GNU gdbm"; /* EMX port of GDBM */
|
|
#elif defined(HAVE_GDBM_NDBM_H)
|
|
#include <gdbm/ndbm.h>
|
|
static char *which_dbm = "GNU gdbm";
|
|
#elif defined(HAVE_GDBM_DASH_NDBM_H)
|
|
#include <gdbm-ndbm.h>
|
|
static char *which_dbm = "GNU gdbm";
|
|
#elif defined(HAVE_BERKDB_H)
|
|
#include <db.h>
|
|
static char *which_dbm = "Berkeley DB";
|
|
#else
|
|
#error "No ndbm.h available!"
|
|
#endif
|
|
|
|
/*[clinic input]
|
|
module dbm
|
|
class dbm.dbm "dbmobject *" "&Dbmtype"
|
|
[clinic start generated code]*/
|
|
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=92450564684a69a3]*/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
int di_size; /* -1 means recompute */
|
|
DBM *di_dbm;
|
|
} dbmobject;
|
|
|
|
static PyTypeObject Dbmtype;
|
|
|
|
#define is_dbmobject(v) (Py_TYPE(v) == &Dbmtype)
|
|
#define check_dbmobject_open(v) if ((v)->di_dbm == NULL) \
|
|
{ PyErr_SetString(DbmError, "DBM object has already been closed"); \
|
|
return NULL; }
|
|
|
|
static PyObject *DbmError;
|
|
|
|
/*[python input]
|
|
class dbmobject_converter(self_converter):
|
|
type = "dbmobject *"
|
|
def pre_render(self):
|
|
super().pre_render()
|
|
self.name = 'dp'
|
|
[python start generated code]*/
|
|
/*[python end generated code: output=da39a3ee5e6b4b0d input=6ad536357913879a]*/
|
|
|
|
static PyObject *
|
|
newdbmobject(const char *file, int flags, int mode)
|
|
{
|
|
dbmobject *dp;
|
|
|
|
dp = PyObject_New(dbmobject, &Dbmtype);
|
|
if (dp == NULL)
|
|
return NULL;
|
|
dp->di_size = -1;
|
|
/* See issue #19296 */
|
|
if ( (dp->di_dbm = dbm_open((char *)file, flags, mode)) == 0 ) {
|
|
PyErr_SetFromErrno(DbmError);
|
|
Py_DECREF(dp);
|
|
return NULL;
|
|
}
|
|
return (PyObject *)dp;
|
|
}
|
|
|
|
/* Methods */
|
|
|
|
static void
|
|
dbm_dealloc(dbmobject *dp)
|
|
{
|
|
if ( dp->di_dbm )
|
|
dbm_close(dp->di_dbm);
|
|
PyObject_Del(dp);
|
|
}
|
|
|
|
static Py_ssize_t
|
|
dbm_length(dbmobject *dp)
|
|
{
|
|
if (dp->di_dbm == NULL) {
|
|
PyErr_SetString(DbmError, "DBM object has already been closed");
|
|
return -1;
|
|
}
|
|
if ( dp->di_size < 0 ) {
|
|
datum key;
|
|
int size;
|
|
|
|
size = 0;
|
|
for ( key=dbm_firstkey(dp->di_dbm); key.dptr;
|
|
key = dbm_nextkey(dp->di_dbm))
|
|
size++;
|
|
dp->di_size = size;
|
|
}
|
|
return dp->di_size;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm_subscript(dbmobject *dp, PyObject *key)
|
|
{
|
|
datum drec, krec;
|
|
Py_ssize_t tmp_size;
|
|
|
|
if (!PyArg_Parse(key, "s#", &krec.dptr, &tmp_size) )
|
|
return NULL;
|
|
|
|
krec.dsize = tmp_size;
|
|
check_dbmobject_open(dp);
|
|
drec = dbm_fetch(dp->di_dbm, krec);
|
|
if ( drec.dptr == 0 ) {
|
|
PyErr_SetObject(PyExc_KeyError, key);
|
|
return NULL;
|
|
}
|
|
if ( dbm_error(dp->di_dbm) ) {
|
|
dbm_clearerr(dp->di_dbm);
|
|
PyErr_SetString(DbmError, "");
|
|
return NULL;
|
|
}
|
|
return PyBytes_FromStringAndSize(drec.dptr, drec.dsize);
|
|
}
|
|
|
|
static int
|
|
dbm_ass_sub(dbmobject *dp, PyObject *v, PyObject *w)
|
|
{
|
|
datum krec, drec;
|
|
Py_ssize_t tmp_size;
|
|
|
|
if ( !PyArg_Parse(v, "s#", &krec.dptr, &tmp_size) ) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"dbm mappings have bytes or string keys only");
|
|
return -1;
|
|
}
|
|
krec.dsize = tmp_size;
|
|
if (dp->di_dbm == NULL) {
|
|
PyErr_SetString(DbmError, "DBM object has already been closed");
|
|
return -1;
|
|
}
|
|
dp->di_size = -1;
|
|
if (w == NULL) {
|
|
if ( dbm_delete(dp->di_dbm, krec) < 0 ) {
|
|
dbm_clearerr(dp->di_dbm);
|
|
PyErr_SetObject(PyExc_KeyError, v);
|
|
return -1;
|
|
}
|
|
} else {
|
|
if ( !PyArg_Parse(w, "s#", &drec.dptr, &tmp_size) ) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"dbm mappings have byte or string elements only");
|
|
return -1;
|
|
}
|
|
drec.dsize = tmp_size;
|
|
if ( dbm_store(dp->di_dbm, krec, drec, DBM_REPLACE) < 0 ) {
|
|
dbm_clearerr(dp->di_dbm);
|
|
PyErr_SetString(DbmError,
|
|
"cannot add item to database");
|
|
return -1;
|
|
}
|
|
}
|
|
if ( dbm_error(dp->di_dbm) ) {
|
|
dbm_clearerr(dp->di_dbm);
|
|
PyErr_SetString(DbmError, "");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static PyMappingMethods dbm_as_mapping = {
|
|
(lenfunc)dbm_length, /*mp_length*/
|
|
(binaryfunc)dbm_subscript, /*mp_subscript*/
|
|
(objobjargproc)dbm_ass_sub, /*mp_ass_subscript*/
|
|
};
|
|
|
|
static PyObject *
|
|
dbm__close(dbmobject *dp, PyObject *unused)
|
|
{
|
|
if (dp->di_dbm)
|
|
dbm_close(dp->di_dbm);
|
|
dp->di_dbm = NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm_keys(dbmobject *dp, PyObject *unused)
|
|
{
|
|
PyObject *v, *item;
|
|
datum key;
|
|
int err;
|
|
|
|
check_dbmobject_open(dp);
|
|
v = PyList_New(0);
|
|
if (v == NULL)
|
|
return NULL;
|
|
for (key = dbm_firstkey(dp->di_dbm); key.dptr;
|
|
key = dbm_nextkey(dp->di_dbm)) {
|
|
item = PyBytes_FromStringAndSize(key.dptr, key.dsize);
|
|
if (item == NULL) {
|
|
Py_DECREF(v);
|
|
return NULL;
|
|
}
|
|
err = PyList_Append(v, item);
|
|
Py_DECREF(item);
|
|
if (err != 0) {
|
|
Py_DECREF(v);
|
|
return NULL;
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static int
|
|
dbm_contains(PyObject *self, PyObject *arg)
|
|
{
|
|
dbmobject *dp = (dbmobject *)self;
|
|
datum key, val;
|
|
Py_ssize_t size;
|
|
|
|
if ((dp)->di_dbm == NULL) {
|
|
PyErr_SetString(DbmError,
|
|
"DBM object has already been closed");
|
|
return -1;
|
|
}
|
|
if (PyUnicode_Check(arg)) {
|
|
key.dptr = PyUnicode_AsUTF8AndSize(arg, &size);
|
|
key.dsize = size;
|
|
if (key.dptr == NULL)
|
|
return -1;
|
|
}
|
|
else if (!PyBytes_Check(arg)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"dbm key must be bytes or string, not %.100s",
|
|
arg->ob_type->tp_name);
|
|
return -1;
|
|
}
|
|
else {
|
|
key.dptr = PyBytes_AS_STRING(arg);
|
|
key.dsize = PyBytes_GET_SIZE(arg);
|
|
}
|
|
val = dbm_fetch(dp->di_dbm, key);
|
|
return val.dptr != NULL;
|
|
}
|
|
|
|
static PySequenceMethods dbm_as_sequence = {
|
|
0, /* sq_length */
|
|
0, /* sq_concat */
|
|
0, /* sq_repeat */
|
|
0, /* sq_item */
|
|
0, /* sq_slice */
|
|
0, /* sq_ass_item */
|
|
0, /* sq_ass_slice */
|
|
dbm_contains, /* sq_contains */
|
|
0, /* sq_inplace_concat */
|
|
0, /* sq_inplace_repeat */
|
|
};
|
|
|
|
/*[clinic input]
|
|
|
|
dbm.dbm.get
|
|
|
|
self: dbmobject
|
|
|
|
key: str(length=True)
|
|
default: object = None
|
|
/
|
|
|
|
Return the value for key if present, otherwise default.
|
|
[clinic start generated code]*/
|
|
|
|
PyDoc_STRVAR(dbm_dbm_get__doc__,
|
|
"get($self, key, default=None, /)\n"
|
|
"--\n"
|
|
"\n"
|
|
"Return the value for key if present, otherwise default.");
|
|
|
|
#define DBM_DBM_GET_METHODDEF \
|
|
{"get", (PyCFunction)dbm_dbm_get, METH_VARARGS, dbm_dbm_get__doc__},
|
|
|
|
static PyObject *
|
|
dbm_dbm_get_impl(dbmobject *dp, const char *key, Py_ssize_clean_t key_length, PyObject *default_value);
|
|
|
|
static PyObject *
|
|
dbm_dbm_get(dbmobject *dp, PyObject *args)
|
|
{
|
|
PyObject *return_value = NULL;
|
|
const char *key;
|
|
Py_ssize_clean_t key_length;
|
|
PyObject *default_value = Py_None;
|
|
|
|
if (!PyArg_ParseTuple(args,
|
|
"s#|O:get",
|
|
&key, &key_length, &default_value))
|
|
goto exit;
|
|
return_value = dbm_dbm_get_impl(dp, key, key_length, default_value);
|
|
|
|
exit:
|
|
return return_value;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm_dbm_get_impl(dbmobject *dp, const char *key, Py_ssize_clean_t key_length, PyObject *default_value)
|
|
/*[clinic end generated code: output=452ea11394e7e92d input=aecf5efd2f2b1a3b]*/
|
|
{
|
|
datum dbm_key, val;
|
|
|
|
dbm_key.dptr = (char *)key;
|
|
dbm_key.dsize = key_length;
|
|
check_dbmobject_open(dp);
|
|
val = dbm_fetch(dp->di_dbm, dbm_key);
|
|
if (val.dptr != NULL)
|
|
return PyBytes_FromStringAndSize(val.dptr, val.dsize);
|
|
|
|
Py_INCREF(default_value);
|
|
return default_value;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm_setdefault(dbmobject *dp, PyObject *args)
|
|
{
|
|
datum key, val;
|
|
PyObject *defvalue = NULL;
|
|
char *tmp_ptr;
|
|
Py_ssize_t tmp_size;
|
|
|
|
if (!PyArg_ParseTuple(args, "s#|O:setdefault",
|
|
&tmp_ptr, &tmp_size, &defvalue))
|
|
return NULL;
|
|
key.dptr = tmp_ptr;
|
|
key.dsize = tmp_size;
|
|
check_dbmobject_open(dp);
|
|
val = dbm_fetch(dp->di_dbm, key);
|
|
if (val.dptr != NULL)
|
|
return PyBytes_FromStringAndSize(val.dptr, val.dsize);
|
|
if (defvalue == NULL) {
|
|
defvalue = PyBytes_FromStringAndSize(NULL, 0);
|
|
if (defvalue == NULL)
|
|
return NULL;
|
|
val.dptr = NULL;
|
|
val.dsize = 0;
|
|
}
|
|
else {
|
|
if ( !PyArg_Parse(defvalue, "s#", &val.dptr, &tmp_size) ) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"dbm mappings have byte string elements only");
|
|
return NULL;
|
|
}
|
|
val.dsize = tmp_size;
|
|
Py_INCREF(defvalue);
|
|
}
|
|
if (dbm_store(dp->di_dbm, key, val, DBM_INSERT) < 0) {
|
|
dbm_clearerr(dp->di_dbm);
|
|
PyErr_SetString(DbmError, "cannot add item to database");
|
|
Py_DECREF(defvalue);
|
|
return NULL;
|
|
}
|
|
return defvalue;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm__enter__(PyObject *self, PyObject *args)
|
|
{
|
|
Py_INCREF(self);
|
|
return self;
|
|
}
|
|
|
|
static PyObject *
|
|
dbm__exit__(PyObject *self, PyObject *args)
|
|
{
|
|
_Py_IDENTIFIER(close);
|
|
return _PyObject_CallMethodId(self, &PyId_close, NULL);
|
|
}
|
|
|
|
|
|
static PyMethodDef dbm_methods[] = {
|
|
{"close", (PyCFunction)dbm__close, METH_NOARGS,
|
|
"close()\nClose the database."},
|
|
{"keys", (PyCFunction)dbm_keys, METH_NOARGS,
|
|
"keys() -> list\nReturn a list of all keys in the database."},
|
|
DBM_DBM_GET_METHODDEF
|
|
{"setdefault", (PyCFunction)dbm_setdefault, METH_VARARGS,
|
|
"setdefault(key[, default]) -> value\n"
|
|
"Return the value for key if present, otherwise default. If key\n"
|
|
"is not in the database, it is inserted with default as the value."},
|
|
{"__enter__", dbm__enter__, METH_NOARGS, NULL},
|
|
{"__exit__", dbm__exit__, METH_VARARGS, NULL},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyTypeObject Dbmtype = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"_dbm.dbm",
|
|
sizeof(dbmobject),
|
|
0,
|
|
(destructor)dbm_dealloc, /*tp_dealloc*/
|
|
0, /*tp_print*/
|
|
0, /*tp_getattr*/
|
|
0, /*tp_setattr*/
|
|
0, /*tp_reserved*/
|
|
0, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
&dbm_as_sequence, /*tp_as_sequence*/
|
|
&dbm_as_mapping, /*tp_as_mapping*/
|
|
0, /*tp_hash*/
|
|
0, /*tp_call*/
|
|
0, /*tp_str*/
|
|
0, /*tp_getattro*/
|
|
0, /*tp_setattro*/
|
|
0, /*tp_as_buffer*/
|
|
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
|
0, /*tp_doc*/
|
|
0, /*tp_traverse*/
|
|
0, /*tp_clear*/
|
|
0, /*tp_richcompare*/
|
|
0, /*tp_weaklistoffset*/
|
|
0, /*tp_iter*/
|
|
0, /*tp_iternext*/
|
|
dbm_methods, /*tp_methods*/
|
|
};
|
|
|
|
/* ----------------------------------------------------------------- */
|
|
|
|
/*[clinic input]
|
|
|
|
dbm.open as dbmopen
|
|
|
|
filename: str
|
|
The filename to open.
|
|
|
|
flags: str="r"
|
|
How to open the file. "r" for reading, "w" for writing, etc.
|
|
|
|
mode: int(py_default="0o666") = 0o666
|
|
If creating a new file, the mode bits for the new file
|
|
(e.g. os.O_RDWR).
|
|
|
|
/
|
|
|
|
Return a database object.
|
|
|
|
[clinic start generated code]*/
|
|
|
|
PyDoc_STRVAR(dbmopen__doc__,
|
|
"open($module, filename, flags=\'r\', mode=0o666, /)\n"
|
|
"--\n"
|
|
"\n"
|
|
"Return a database object.\n"
|
|
"\n"
|
|
" filename\n"
|
|
" The filename to open.\n"
|
|
" flags\n"
|
|
" How to open the file. \"r\" for reading, \"w\" for writing, etc.\n"
|
|
" mode\n"
|
|
" If creating a new file, the mode bits for the new file\n"
|
|
" (e.g. os.O_RDWR).");
|
|
|
|
#define DBMOPEN_METHODDEF \
|
|
{"open", (PyCFunction)dbmopen, METH_VARARGS, dbmopen__doc__},
|
|
|
|
static PyObject *
|
|
dbmopen_impl(PyModuleDef *module, const char *filename, const char *flags, int mode);
|
|
|
|
static PyObject *
|
|
dbmopen(PyModuleDef *module, PyObject *args)
|
|
{
|
|
PyObject *return_value = NULL;
|
|
const char *filename;
|
|
const char *flags = "r";
|
|
int mode = 438;
|
|
|
|
if (!PyArg_ParseTuple(args,
|
|
"s|si:open",
|
|
&filename, &flags, &mode))
|
|
goto exit;
|
|
return_value = dbmopen_impl(module, filename, flags, mode);
|
|
|
|
exit:
|
|
return return_value;
|
|
}
|
|
|
|
static PyObject *
|
|
dbmopen_impl(PyModuleDef *module, const char *filename, const char *flags, int mode)
|
|
/*[clinic end generated code: output=9a7b725f9c4dcec2 input=6499ab0fab1333ac]*/
|
|
{
|
|
int iflags;
|
|
|
|
if ( strcmp(flags, "r") == 0 )
|
|
iflags = O_RDONLY;
|
|
else if ( strcmp(flags, "w") == 0 )
|
|
iflags = O_RDWR;
|
|
else if ( strcmp(flags, "rw") == 0 ) /* B/W compat */
|
|
iflags = O_RDWR|O_CREAT;
|
|
else if ( strcmp(flags, "c") == 0 )
|
|
iflags = O_RDWR|O_CREAT;
|
|
else if ( strcmp(flags, "n") == 0 )
|
|
iflags = O_RDWR|O_CREAT|O_TRUNC;
|
|
else {
|
|
PyErr_SetString(DbmError,
|
|
"arg 2 to open should be 'r', 'w', 'c', or 'n'");
|
|
return NULL;
|
|
}
|
|
return newdbmobject(filename, iflags, mode);
|
|
}
|
|
|
|
static PyMethodDef dbmmodule_methods[] = {
|
|
DBMOPEN_METHODDEF
|
|
{ 0, 0 },
|
|
};
|
|
|
|
|
|
static struct PyModuleDef _dbmmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"_dbm",
|
|
NULL,
|
|
-1,
|
|
dbmmodule_methods,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__dbm(void) {
|
|
PyObject *m, *d, *s;
|
|
|
|
if (PyType_Ready(&Dbmtype) < 0)
|
|
return NULL;
|
|
m = PyModule_Create(&_dbmmodule);
|
|
if (m == NULL)
|
|
return NULL;
|
|
d = PyModule_GetDict(m);
|
|
if (DbmError == NULL)
|
|
DbmError = PyErr_NewException("_dbm.error",
|
|
PyExc_IOError, NULL);
|
|
s = PyUnicode_FromString(which_dbm);
|
|
if (s != NULL) {
|
|
PyDict_SetItemString(d, "library", s);
|
|
Py_DECREF(s);
|
|
}
|
|
if (DbmError != NULL)
|
|
PyDict_SetItemString(d, "error", DbmError);
|
|
if (PyErr_Occurred()) {
|
|
Py_DECREF(m);
|
|
m = NULL;
|
|
}
|
|
return m;
|
|
}
|