diff options
Diffstat (limited to 'pytdb.c')
| -rw-r--r-- | pytdb.c | 876 |
1 files changed, 876 insertions, 0 deletions
@@ -0,0 +1,876 @@ +/* + Unix SMB/CIFS implementation. + + Python interface to tdb. + + Copyright (C) 2004-2006 Tim Potter <tpot@samba.org> + Copyright (C) 2007-2008 Jelmer Vernooij <jelmer@samba.org> + + ** NOTE! The following LGPL license applies to the tdb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +#include <Python.h> +#include "replace.h" +#include "system/filesys.h" + +/* Include tdb headers */ +#include <tdb.h> + +#if PY_MAJOR_VERSION >= 3 +#define Py_TPFLAGS_HAVE_ITER 0 +#endif + +/* discard signature of 'func' in favour of 'target_sig' */ +#define PY_DISCARD_FUNC_SIG(target_sig, func) (target_sig)(void(*)(void))func + +typedef struct { + PyObject_HEAD + TDB_CONTEXT *ctx; + bool closed; +} PyTdbObject; + +static PyTypeObject PyTdb; + +static void PyErr_SetTDBError(TDB_CONTEXT *tdb) +{ + PyErr_SetObject(PyExc_RuntimeError, + Py_BuildValue("(i,s)", tdb_error(tdb), tdb_errorstr(tdb))); +} + +static TDB_DATA PyBytes_AsTDB_DATA(PyObject *data) +{ + TDB_DATA ret; + ret.dptr = (unsigned char *)PyBytes_AsString(data); + ret.dsize = PyBytes_Size(data); + return ret; +} + +static PyObject *PyBytes_FromTDB_DATA(TDB_DATA data) +{ + if (data.dptr == NULL && data.dsize == 0) { + Py_RETURN_NONE; + } else { + PyObject *ret = PyBytes_FromStringAndSize((const char *)data.dptr, + data.dsize); + free(data.dptr); + return ret; + } +} + +#define PyErr_TDB_ERROR_IS_ERR_RAISE(ret, tdb) \ + if (ret != 0) { \ + PyErr_SetTDBError(tdb); \ + return NULL; \ + } + +#define PyErr_TDB_RAISE_IF_CLOSED(self) \ + if (self->closed) { \ + PyErr_SetObject(PyExc_RuntimeError, \ + Py_BuildValue("(i,s)", TDB_ERR_IO, "Database is already closed")); \ + return NULL; \ + } + +#define PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self) \ + if (self->closed) { \ + PyErr_SetObject(PyExc_RuntimeError, \ + Py_BuildValue("(i,s)", TDB_ERR_IO, "Database is already closed")); \ + return -1; \ + } + +static PyObject *py_tdb_open(PyTypeObject *type, PyObject *args, PyObject *kwargs) +{ + char *name = NULL; + int hash_size = 0, tdb_flags = TDB_DEFAULT, flags = O_RDWR, mode = 0600; + TDB_CONTEXT *ctx; + PyTdbObject *ret; + const char *_kwnames[] = { "name", "hash_size", "tdb_flags", "flags", "mode", NULL }; + char **kwnames = discard_const_p(char *, _kwnames); + + if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|siiii", kwnames, &name, &hash_size, &tdb_flags, &flags, &mode)) + return NULL; + + if (name == NULL) { + tdb_flags |= TDB_INTERNAL; + } + + ctx = tdb_open(name, hash_size, tdb_flags, flags, mode); + if (ctx == NULL) { + PyErr_SetFromErrno(PyExc_IOError); + return NULL; + } + + ret = PyObject_New(PyTdbObject, &PyTdb); + if (!ret) { + tdb_close(ctx); + return NULL; + } + + ret->ctx = ctx; + ret->closed = false; + return (PyObject *)ret; +} + +static PyObject *obj_transaction_cancel(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + ret = tdb_transaction_cancel(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_transaction_commit(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_transaction_commit(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_transaction_prepare_commit(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_transaction_prepare_commit(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_transaction_start(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_transaction_start(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_reopen(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_reopen(self->ctx); + if (ret != 0) { + self->closed = true; + PyErr_SetObject(PyExc_RuntimeError, + Py_BuildValue("(i,s)", + TDB_ERR_IO, + "Failed to reopen database")); + return NULL; + } + Py_RETURN_NONE; +} + +static PyObject *obj_lockall(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_lockall(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_unlockall(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_unlockall(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_lockall_read(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_lockall_read(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_unlockall_read(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + int ret = tdb_unlockall_read(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_close(PyTdbObject *self, PyObject *Py_UNUSED(ignored)) +{ + int ret; + if (self->closed) + Py_RETURN_NONE; + ret = tdb_close(self->ctx); + self->closed = true; + if (ret != 0) { + PyErr_SetObject(PyExc_RuntimeError, + Py_BuildValue("(i,s)", + TDB_ERR_IO, + "Failed to close database")); + return NULL; + } + Py_RETURN_NONE; +} + +static PyObject *obj_get(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key; + PyObject *py_key; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "O", &py_key)) + return NULL; + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) + return NULL; + + return PyBytes_FromTDB_DATA(tdb_fetch(self->ctx, key)); +} + +static PyObject *obj_append(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key, data; + PyObject *py_key, *py_data; + int ret; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "OO", &py_key, &py_data)) + return NULL; + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) + return NULL; + data = PyBytes_AsTDB_DATA(py_data); + if (!data.dptr) + return NULL; + + ret = tdb_append(self->ctx, key, data); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_firstkey(PyTdbObject *self, PyObject *Py_UNUSED(ignored)) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + + return PyBytes_FromTDB_DATA(tdb_firstkey(self->ctx)); +} + +static PyObject *obj_nextkey(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key; + PyObject *py_key; + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "O", &py_key)) + return NULL; + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) + return NULL; + + return PyBytes_FromTDB_DATA(tdb_nextkey(self->ctx, key)); +} + +static PyObject *obj_delete(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key; + PyObject *py_key; + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "O", &py_key)) + return NULL; + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) + return NULL; + ret = tdb_delete(self->ctx, key); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static int obj_contains(PyTdbObject *self, PyObject *py_key) +{ + TDB_DATA key; + int ret; + PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self); + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) { + PyErr_BadArgument(); + return -1; + } + ret = tdb_exists(self->ctx, key); + if (ret) + return 1; + return 0; +} + +#if PY_MAJOR_VERSION < 3 +static PyObject *obj_has_key(PyTdbObject *self, PyObject *args) +{ + int ret; + PyObject *py_key; + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "O", &py_key)) + return NULL; + + ret = obj_contains(self, py_key); + if (ret == -1) + return NULL; + if (ret) + Py_RETURN_TRUE; + Py_RETURN_FALSE; + +} +#endif + +static PyObject *obj_store(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key, value; + int ret; + int flag = TDB_REPLACE; + PyObject *py_key, *py_value; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "OO|i", &py_key, &py_value, &flag)) + return NULL; + + key = PyBytes_AsTDB_DATA(py_key); + if (!key.dptr) + return NULL; + value = PyBytes_AsTDB_DATA(py_value); + if (!value.dptr) + return NULL; + + ret = tdb_store(self->ctx, key, value, flag); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_storev(PyTdbObject *self, PyObject *args) +{ + TDB_DATA key, *values, value; + int ret; + int flag = TDB_REPLACE; + Py_ssize_t num_values, i; + PyObject *py_key, *py_values, *py_value; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple( + args, "OO!|i", &py_key, &PyList_Type, &py_values, &flag)) { + return NULL; + } + + num_values = PyList_Size(py_values); + + key = PyBytes_AsTDB_DATA(py_key); + if (key.dptr == NULL) { + return NULL; + } + + if (SSIZE_MAX/sizeof(TDB_DATA) < num_values) { + PyErr_SetFromErrno(PyExc_OverflowError); + return NULL; + } + values = malloc(sizeof(TDB_DATA) * num_values); + if (values == NULL) { + PyErr_NoMemory(); + return NULL; + } + for (i=0; i<num_values; i++) { + py_value = PyList_GetItem(py_values, i); + value = PyBytes_AsTDB_DATA(py_value); + if (!value.dptr) { + free(values); + return NULL; + } + values[i] = value; + } + + ret = tdb_storev(self->ctx, key, values, num_values, flag); + free(values); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_add_flags(PyTdbObject *self, PyObject *args) +{ + unsigned flags; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "I", &flags)) + return NULL; + + tdb_add_flags(self->ctx, flags); + Py_RETURN_NONE; +} + +static PyObject *obj_remove_flags(PyTdbObject *self, PyObject *args) +{ + unsigned flags; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + if (!PyArg_ParseTuple(args, "I", &flags)) + return NULL; + + tdb_remove_flags(self->ctx, flags); + Py_RETURN_NONE; +} + +typedef struct { + PyObject_HEAD + TDB_DATA current; + PyTdbObject *iteratee; +} PyTdbIteratorObject; + +static PyObject *tdb_iter_next(PyTdbIteratorObject *self) +{ + TDB_DATA current; + PyObject *ret; + if (self->current.dptr == NULL && self->current.dsize == 0) + return NULL; + current = self->current; + self->current = tdb_nextkey(self->iteratee->ctx, self->current); + ret = PyBytes_FromTDB_DATA(current); + return ret; +} + +static void tdb_iter_dealloc(PyTdbIteratorObject *self) +{ + Py_DECREF(self->iteratee); + PyObject_Del(self); +} + +PyTypeObject PyTdbIterator = { + .tp_name = "Iterator", + .tp_basicsize = sizeof(PyTdbIteratorObject), + .tp_iternext = (iternextfunc)tdb_iter_next, + .tp_dealloc = (destructor)tdb_iter_dealloc, + .tp_flags = Py_TPFLAGS_DEFAULT, + .tp_iter = PyObject_SelfIter, +}; + +static PyObject *tdb_object_iter(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + PyTdbIteratorObject *ret; + + PyErr_TDB_RAISE_IF_CLOSED(self); + + ret = PyObject_New(PyTdbIteratorObject, &PyTdbIterator); + if (!ret) + return NULL; + ret->current = tdb_firstkey(self->ctx); + ret->iteratee = self; + Py_INCREF(self); + return (PyObject *)ret; +} + +static PyObject *obj_clear(PyTdbObject *self, PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_wipe_all(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_repack(PyTdbObject *self, PyObject *Py_UNUSED(ignored)) +{ + int ret; + PyErr_TDB_RAISE_IF_CLOSED(self); + ret = tdb_repack(self->ctx); + PyErr_TDB_ERROR_IS_ERR_RAISE(ret, self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_enable_seqnum(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + tdb_enable_seqnum(self->ctx); + Py_RETURN_NONE; +} + +static PyObject *obj_increment_seqnum_nonblock(PyTdbObject *self, + PyObject *Py_UNUSED(ignored)) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + tdb_increment_seqnum_nonblock(self->ctx); + Py_RETURN_NONE; +} + +static PyMethodDef tdb_object_methods[] = { + { "transaction_cancel", (PyCFunction)obj_transaction_cancel, METH_NOARGS, + "S.transaction_cancel() -> None\n" + "Cancel the currently active transaction." }, + { "transaction_commit", (PyCFunction)obj_transaction_commit, METH_NOARGS, + "S.transaction_commit() -> None\n" + "Commit the currently active transaction." }, + { "transaction_prepare_commit", (PyCFunction)obj_transaction_prepare_commit, METH_NOARGS, + "S.transaction_prepare_commit() -> None\n" + "Prepare to commit the currently active transaction" }, + { "transaction_start", (PyCFunction)obj_transaction_start, METH_NOARGS, + "S.transaction_start() -> None\n" + "Start a new transaction." }, + { "reopen", (PyCFunction)obj_reopen, METH_NOARGS, "Reopen this file." }, + { "lock_all", (PyCFunction)obj_lockall, METH_NOARGS, NULL }, + { "unlock_all", (PyCFunction)obj_unlockall, METH_NOARGS, NULL }, + { "read_lock_all", (PyCFunction)obj_lockall_read, METH_NOARGS, NULL }, + { "read_unlock_all", (PyCFunction)obj_unlockall_read, METH_NOARGS, NULL }, + { "close", (PyCFunction)obj_close, METH_NOARGS, NULL }, + { "get", (PyCFunction)obj_get, METH_VARARGS, "S.get(key) -> value\n" + "Fetch a value." }, + { "append", (PyCFunction)obj_append, METH_VARARGS, "S.append(key, value) -> None\n" + "Append data to an existing key." }, + { "firstkey", (PyCFunction)obj_firstkey, METH_NOARGS, "S.firstkey() -> data\n" + "Return the first key in this database." }, + { "nextkey", (PyCFunction)obj_nextkey, METH_VARARGS, "S.nextkey(key) -> data\n" + "Return the next key in this database." }, + { "delete", (PyCFunction)obj_delete, METH_VARARGS, "S.delete(key) -> None\n" + "Delete an entry." }, +#if PY_MAJOR_VERSION < 3 + { "has_key", (PyCFunction)obj_has_key, METH_VARARGS, "S.has_key(key) -> None\n" + "Check whether key exists in this database." }, +#endif + { "store", (PyCFunction)obj_store, METH_VARARGS, "S.store(key, data, flag=REPLACE) -> None" + "Store data." }, + { "storev", (PyCFunction)obj_storev, METH_VARARGS, "S.storev(key, data, flag=REPLACE) -> None" + "Store several data." }, + { "add_flags", (PyCFunction)obj_add_flags, METH_VARARGS, "S.add_flags(flags) -> None" }, + { "remove_flags", (PyCFunction)obj_remove_flags, METH_VARARGS, "S.remove_flags(flags) -> None" }, +#if PY_MAJOR_VERSION >= 3 + { "keys", (PyCFunction)tdb_object_iter, METH_NOARGS, "S.keys() -> iterator" }, +#else + { "iterkeys", (PyCFunction)tdb_object_iter, METH_NOARGS, "S.iterkeys() -> iterator" }, +#endif + { "clear", (PyCFunction)obj_clear, METH_NOARGS, "S.clear() -> None\n" + "Wipe the entire database." }, + { "repack", (PyCFunction)obj_repack, METH_NOARGS, "S.repack() -> None\n" + "Repack the entire database." }, + { "enable_seqnum", (PyCFunction)obj_enable_seqnum, METH_NOARGS, + "S.enable_seqnum() -> None" }, + { "increment_seqnum_nonblock", (PyCFunction)obj_increment_seqnum_nonblock, METH_NOARGS, + "S.increment_seqnum_nonblock() -> None" }, + {0} +}; + +static PyObject *obj_get_hash_size(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyLong_FromLong(tdb_hash_size(self->ctx)); +} + +static int obj_set_max_dead(PyTdbObject *self, PyObject *max_dead, void *closure) +{ + PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self); + if (!PyLong_Check(max_dead)) + return -1; + tdb_set_max_dead(self->ctx, PyLong_AsLong(max_dead)); + return 0; +} + +static PyObject *obj_get_map_size(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyLong_FromLong(tdb_map_size(self->ctx)); +} + +static PyObject *obj_get_freelist_size(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyLong_FromLong(tdb_freelist_size(self->ctx)); +} + +static PyObject *obj_get_flags(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyLong_FromLong(tdb_get_flags(self->ctx)); +} + +static PyObject *obj_get_filename(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyBytes_FromString(tdb_name(self->ctx)); +} + +static PyObject *obj_get_seqnum(PyTdbObject *self, void *closure) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + return PyLong_FromLong(tdb_get_seqnum(self->ctx)); +} + +static PyObject *obj_get_text(PyTdbObject *self, void *closure) +{ + PyObject *mod, *cls, *inst; + mod = PyImport_ImportModule("_tdb_text"); + if (mod == NULL) + return NULL; + cls = PyObject_GetAttrString(mod, "TdbTextWrapper"); + if (cls == NULL) { + Py_DECREF(mod); + return NULL; + } + inst = PyObject_CallFunction(cls, discard_const_p(char, "O"), self); + Py_DECREF(mod); + Py_DECREF(cls); + return inst; +} + +static PyGetSetDef tdb_object_getsetters[] = { + { + .name = discard_const_p(char, "hash_size"), + .get = (getter)obj_get_hash_size, + }, + { + .name = discard_const_p(char, "map_size"), + .get = (getter)obj_get_map_size, + }, + { + .name = discard_const_p(char, "freelist_size"), + .get = (getter)obj_get_freelist_size, + }, + { + .name = discard_const_p(char, "flags"), + .get = (getter)obj_get_flags, + }, + { + .name = discard_const_p(char, "max_dead"), + .set = (setter)obj_set_max_dead, + }, + { + .name = discard_const_p(char, "filename"), + .get = (getter)obj_get_filename, + .doc = discard_const_p(char, "The filename of this TDB file."), + }, + { + .name = discard_const_p(char, "seqnum"), + .get = (getter)obj_get_seqnum, + }, + { + .name = discard_const_p(char, "text"), + .get = (getter)obj_get_text, + }, + { .name = NULL } +}; + +static PyObject *tdb_object_repr(PyTdbObject *self) +{ + PyErr_TDB_RAISE_IF_CLOSED(self); + if (tdb_get_flags(self->ctx) & TDB_INTERNAL) { + return PyUnicode_FromString("Tdb(<internal>)"); + } else { + return PyUnicode_FromFormat("Tdb('%s')", tdb_name(self->ctx)); + } +} + +static void tdb_object_dealloc(PyTdbObject *self) +{ + if (!self->closed) + tdb_close(self->ctx); + Py_TYPE(self)->tp_free(self); +} + +static PyObject *obj_getitem(PyTdbObject *self, PyObject *key) +{ + TDB_DATA tkey, val; + PyErr_TDB_RAISE_IF_CLOSED(self); + if (!PyBytes_Check(key)) { + PyErr_SetString(PyExc_TypeError, "Expected bytestring as key"); + return NULL; + } + + tkey.dptr = (unsigned char *)PyBytes_AsString(key); + tkey.dsize = PyBytes_Size(key); + + val = tdb_fetch(self->ctx, tkey); + if (val.dptr == NULL) { + /* + * if the key doesn't exist raise KeyError(key) to be + * consistent with python dict + */ + PyErr_SetObject(PyExc_KeyError, key); + return NULL; + } else { + return PyBytes_FromTDB_DATA(val); + } +} + +static int obj_setitem(PyTdbObject *self, PyObject *key, PyObject *value) +{ + TDB_DATA tkey, tval; + int ret; + PyErr_TDB_RAISE_RETURN_MINUS_1_IF_CLOSED(self); + if (!PyBytes_Check(key)) { + PyErr_SetString(PyExc_TypeError, "Expected bytestring as key"); + return -1; + } + + tkey = PyBytes_AsTDB_DATA(key); + + if (value == NULL) { + ret = tdb_delete(self->ctx, tkey); + } else { + if (!PyBytes_Check(value)) { + PyErr_SetString(PyExc_TypeError, "Expected string as value"); + return -1; + } + + tval = PyBytes_AsTDB_DATA(value); + + ret = tdb_store(self->ctx, tkey, tval, TDB_REPLACE); + } + + if (ret != 0) { + PyErr_SetTDBError(self->ctx); + return -1; + } + + return ret; +} + +static PyMappingMethods tdb_object_mapping = { + .mp_subscript = (binaryfunc)obj_getitem, + .mp_ass_subscript = (objobjargproc)obj_setitem, +}; +static PySequenceMethods tdb_object_seq = { + .sq_contains = (objobjproc)obj_contains, +}; +static PyTypeObject PyTdb = { + .tp_name = "tdb.Tdb", + .tp_basicsize = sizeof(PyTdbObject), + .tp_methods = tdb_object_methods, + .tp_getset = tdb_object_getsetters, + .tp_new = py_tdb_open, + .tp_doc = "A TDB file", + .tp_repr = (reprfunc)tdb_object_repr, + .tp_dealloc = (destructor)tdb_object_dealloc, + .tp_as_mapping = &tdb_object_mapping, + .tp_as_sequence = &tdb_object_seq, + .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_ITER, + .tp_iter = PY_DISCARD_FUNC_SIG(getiterfunc,tdb_object_iter), +}; + +static PyMethodDef tdb_methods[] = { + { + .ml_name = "open", + .ml_meth = PY_DISCARD_FUNC_SIG(PyCFunction, py_tdb_open), + .ml_flags = METH_VARARGS|METH_KEYWORDS, + .ml_doc = "open(name, hash_size=0, tdb_flags=TDB_DEFAULT, " + "flags=O_RDWR, mode=0600)\nOpen a TDB file." + }, + { .ml_name = NULL } +}; + +#define MODULE_DOC "simple key-value database that supports multiple writers." + +#if PY_MAJOR_VERSION >= 3 +static struct PyModuleDef moduledef = { + PyModuleDef_HEAD_INIT, + .m_name = "tdb", + .m_doc = MODULE_DOC, + .m_size = -1, + .m_methods = tdb_methods, +}; +#endif + +PyObject* module_init(void); +PyObject* module_init(void) +{ + PyObject *m; + + if (PyType_Ready(&PyTdb) < 0) + return NULL; + + if (PyType_Ready(&PyTdbIterator) < 0) + return NULL; + +#if PY_MAJOR_VERSION >= 3 + m = PyModule_Create(&moduledef); +#else + m = Py_InitModule3("tdb", tdb_methods, MODULE_DOC); +#endif + if (m == NULL) + return NULL; + + PyModule_AddIntConstant(m, "REPLACE", TDB_REPLACE); + PyModule_AddIntConstant(m, "INSERT", TDB_INSERT); + PyModule_AddIntConstant(m, "MODIFY", TDB_MODIFY); + + PyModule_AddIntConstant(m, "DEFAULT", TDB_DEFAULT); + PyModule_AddIntConstant(m, "CLEAR_IF_FIRST", TDB_CLEAR_IF_FIRST); + PyModule_AddIntConstant(m, "INTERNAL", TDB_INTERNAL); + PyModule_AddIntConstant(m, "NOLOCK", TDB_NOLOCK); + PyModule_AddIntConstant(m, "NOMMAP", TDB_NOMMAP); + PyModule_AddIntConstant(m, "CONVERT", TDB_CONVERT); + PyModule_AddIntConstant(m, "BIGENDIAN", TDB_BIGENDIAN); + PyModule_AddIntConstant(m, "NOSYNC", TDB_NOSYNC); + PyModule_AddIntConstant(m, "SEQNUM", TDB_SEQNUM); + PyModule_AddIntConstant(m, "VOLATILE", TDB_VOLATILE); + PyModule_AddIntConstant(m, "ALLOW_NESTING", TDB_ALLOW_NESTING); + PyModule_AddIntConstant(m, "DISALLOW_NESTING", TDB_DISALLOW_NESTING); + PyModule_AddIntConstant(m, "INCOMPATIBLE_HASH", TDB_INCOMPATIBLE_HASH); + + PyModule_AddStringConstant(m, "__docformat__", "restructuredText"); + + PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION); + + Py_INCREF(&PyTdb); + PyModule_AddObject(m, "Tdb", (PyObject *)&PyTdb); + + Py_INCREF(&PyTdbIterator); + + return m; +} + + +#if PY_MAJOR_VERSION >= 3 +PyMODINIT_FUNC PyInit_tdb(void); +PyMODINIT_FUNC PyInit_tdb(void) +{ + return module_init(); +} +#else +void inittdb(void); +void inittdb(void) +{ + module_init(); +} +#endif |