mirror of
https://github.com/python/cpython
synced 2024-09-05 08:17:45 +00:00
790 lines
21 KiB
C
790 lines
21 KiB
C
|
|
/* GDBM module using dictionary interface */
|
|
/* Author: Anthony Baxter, after dbmmodule.c */
|
|
/* Doc strings: Mitch Chapman */
|
|
|
|
#define PY_SSIZE_T_CLEAN
|
|
#include "Python.h"
|
|
#include "gdbm.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <stdlib.h> // free()
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#if defined(WIN32) && !defined(__CYGWIN__)
|
|
#include "gdbmerrno.h"
|
|
extern const char * gdbm_strerror(gdbm_error);
|
|
#endif
|
|
|
|
typedef struct {
|
|
PyTypeObject *gdbm_type;
|
|
PyObject *gdbm_error;
|
|
} _gdbm_state;
|
|
|
|
static inline _gdbm_state*
|
|
get_gdbm_state(PyObject *module)
|
|
{
|
|
void *state = PyModule_GetState(module);
|
|
assert(state != NULL);
|
|
return (_gdbm_state *)state;
|
|
}
|
|
|
|
/*[clinic input]
|
|
module _gdbm
|
|
class _gdbm.gdbm "gdbmobject *" "&Gdbmtype"
|
|
[clinic start generated code]*/
|
|
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=38ae71cedfc7172b]*/
|
|
|
|
PyDoc_STRVAR(gdbmmodule__doc__,
|
|
"This module provides an interface to the GNU DBM (GDBM) library.\n\
|
|
\n\
|
|
This module is quite similar to the dbm module, but uses GDBM instead to\n\
|
|
provide some additional functionality. Please note that the file formats\n\
|
|
created by GDBM and dbm are incompatible.\n\
|
|
\n\
|
|
GDBM objects behave like mappings (dictionaries), except that keys and\n\
|
|
values are always immutable bytes-like objects or strings. Printing\n\
|
|
a GDBM object doesn't print the keys and values, and the items() and\n\
|
|
values() methods are not supported.");
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
Py_ssize_t di_size; /* -1 means recompute */
|
|
GDBM_FILE di_dbm;
|
|
} gdbmobject;
|
|
|
|
#include "clinic/_gdbmmodule.c.h"
|
|
|
|
#define check_gdbmobject_open(v, err) \
|
|
if ((v)->di_dbm == NULL) { \
|
|
PyErr_SetString(err, "GDBM object has already been closed"); \
|
|
return NULL; \
|
|
}
|
|
|
|
PyDoc_STRVAR(gdbm_object__doc__,
|
|
"This object represents a GDBM database.\n\
|
|
GDBM objects behave like mappings (dictionaries), except that keys and\n\
|
|
values are always immutable bytes-like objects or strings. Printing\n\
|
|
a GDBM object doesn't print the keys and values, and the items() and\n\
|
|
values() methods are not supported.\n\
|
|
\n\
|
|
GDBM objects also support additional operations such as firstkey,\n\
|
|
nextkey, reorganize, and sync.");
|
|
|
|
static PyObject *
|
|
newgdbmobject(_gdbm_state *state, const char *file, int flags, int mode)
|
|
{
|
|
gdbmobject *dp = PyObject_GC_New(gdbmobject, state->gdbm_type);
|
|
if (dp == NULL) {
|
|
return NULL;
|
|
}
|
|
dp->di_size = -1;
|
|
errno = 0;
|
|
PyObject_GC_Track(dp);
|
|
|
|
if ((dp->di_dbm = gdbm_open((char *)file, 0, flags, mode, NULL)) == 0) {
|
|
if (errno != 0) {
|
|
PyErr_SetFromErrnoWithFilename(state->gdbm_error, file);
|
|
}
|
|
else {
|
|
PyErr_SetString(state->gdbm_error, gdbm_strerror(gdbm_errno));
|
|
}
|
|
Py_DECREF(dp);
|
|
return NULL;
|
|
}
|
|
return (PyObject *)dp;
|
|
}
|
|
|
|
/* Methods */
|
|
static int
|
|
gdbm_traverse(gdbmobject *dp, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(dp));
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
gdbm_dealloc(gdbmobject *dp)
|
|
{
|
|
PyObject_GC_UnTrack(dp);
|
|
if (dp->di_dbm) {
|
|
gdbm_close(dp->di_dbm);
|
|
}
|
|
PyTypeObject *tp = Py_TYPE(dp);
|
|
tp->tp_free(dp);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
static Py_ssize_t
|
|
gdbm_length(gdbmobject *dp)
|
|
{
|
|
_gdbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
|
|
if (dp->di_dbm == NULL) {
|
|
PyErr_SetString(state->gdbm_error, "GDBM object has already been closed");
|
|
return -1;
|
|
}
|
|
if (dp->di_size < 0) {
|
|
#if GDBM_VERSION_MAJOR >= 1 && GDBM_VERSION_MINOR >= 11
|
|
errno = 0;
|
|
gdbm_count_t count;
|
|
if (gdbm_count(dp->di_dbm, &count) == -1) {
|
|
if (errno != 0) {
|
|
PyErr_SetFromErrno(state->gdbm_error);
|
|
}
|
|
else {
|
|
PyErr_SetString(state->gdbm_error, gdbm_strerror(gdbm_errno));
|
|
}
|
|
return -1;
|
|
}
|
|
if (count > PY_SSIZE_T_MAX) {
|
|
PyErr_SetString(PyExc_OverflowError, "count exceeds PY_SSIZE_T_MAX");
|
|
return -1;
|
|
}
|
|
dp->di_size = count;
|
|
#else
|
|
datum key,okey;
|
|
okey.dsize=0;
|
|
okey.dptr=NULL;
|
|
|
|
Py_ssize_t size = 0;
|
|
for (key = gdbm_firstkey(dp->di_dbm); key.dptr;
|
|
key = gdbm_nextkey(dp->di_dbm,okey)) {
|
|
size++;
|
|
if (okey.dsize) {
|
|
free(okey.dptr);
|
|
}
|
|
okey=key;
|
|
}
|
|
dp->di_size = size;
|
|
#endif
|
|
}
|
|
return dp->di_size;
|
|
}
|
|
|
|
// Wrapper function for PyArg_Parse(o, "s#", &d.dptr, &d.size).
|
|
// This function is needed to support PY_SSIZE_T_CLEAN.
|
|
// Return 1 on success, same to PyArg_Parse().
|
|
static int
|
|
parse_datum(PyObject *o, datum *d, const char *failmsg)
|
|
{
|
|
Py_ssize_t size;
|
|
if (!PyArg_Parse(o, "s#", &d->dptr, &size)) {
|
|
if (failmsg != NULL) {
|
|
PyErr_SetString(PyExc_TypeError, failmsg);
|
|
}
|
|
return 0;
|
|
}
|
|
if (INT_MAX < size) {
|
|
PyErr_SetString(PyExc_OverflowError, "size does not fit in an int");
|
|
return 0;
|
|
}
|
|
d->dsize = size;
|
|
return 1;
|
|
}
|
|
|
|
static PyObject *
|
|
gdbm_subscript(gdbmobject *dp, PyObject *key)
|
|
{
|
|
PyObject *v;
|
|
datum drec, krec;
|
|
_gdbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
|
|
|
|
if (!parse_datum(key, &krec, NULL)) {
|
|
return NULL;
|
|
}
|
|
if (dp->di_dbm == NULL) {
|
|
PyErr_SetString(state->gdbm_error,
|
|
"GDBM object has already been closed");
|
|
return NULL;
|
|
}
|
|
drec = gdbm_fetch(dp->di_dbm, krec);
|
|
if (drec.dptr == 0) {
|
|
PyErr_SetObject(PyExc_KeyError, key);
|
|
return NULL;
|
|
}
|
|
v = PyBytes_FromStringAndSize(drec.dptr, drec.dsize);
|
|
free(drec.dptr);
|
|
return v;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.get
|
|
|
|
key: object
|
|
default: object = None
|
|
/
|
|
|
|
Get the value for key, or default if not present.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_get_impl(gdbmobject *self, PyObject *key, PyObject *default_value)
|
|
/*[clinic end generated code: output=92421838f3a852f4 input=a9c20423f34c17b6]*/
|
|
{
|
|
PyObject *res;
|
|
|
|
res = gdbm_subscript(self, key);
|
|
if (res == NULL && PyErr_ExceptionMatches(PyExc_KeyError)) {
|
|
PyErr_Clear();
|
|
Py_INCREF(default_value);
|
|
return default_value;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
gdbm_ass_sub(gdbmobject *dp, PyObject *v, PyObject *w)
|
|
{
|
|
datum krec, drec;
|
|
const char *failmsg = "gdbm mappings have bytes or string indices only";
|
|
_gdbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
|
|
|
|
if (!parse_datum(v, &krec, failmsg)) {
|
|
return -1;
|
|
}
|
|
if (dp->di_dbm == NULL) {
|
|
PyErr_SetString(state->gdbm_error,
|
|
"GDBM object has already been closed");
|
|
return -1;
|
|
}
|
|
dp->di_size = -1;
|
|
if (w == NULL) {
|
|
if (gdbm_delete(dp->di_dbm, krec) < 0) {
|
|
if (gdbm_errno == GDBM_ITEM_NOT_FOUND) {
|
|
PyErr_SetObject(PyExc_KeyError, v);
|
|
}
|
|
else {
|
|
PyErr_SetString(state->gdbm_error, gdbm_strerror(gdbm_errno));
|
|
}
|
|
return -1;
|
|
}
|
|
}
|
|
else {
|
|
if (!parse_datum(w, &drec, failmsg)) {
|
|
return -1;
|
|
}
|
|
errno = 0;
|
|
if (gdbm_store(dp->di_dbm, krec, drec, GDBM_REPLACE) < 0) {
|
|
if (errno != 0)
|
|
PyErr_SetFromErrno(state->gdbm_error);
|
|
else
|
|
PyErr_SetString(state->gdbm_error,
|
|
gdbm_strerror(gdbm_errno));
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.setdefault
|
|
|
|
key: object
|
|
default: object = None
|
|
/
|
|
|
|
Get value for key, or set it to default and return default if not present.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_setdefault_impl(gdbmobject *self, PyObject *key,
|
|
PyObject *default_value)
|
|
/*[clinic end generated code: output=f3246e880509f142 input=0db46b69e9680171]*/
|
|
{
|
|
PyObject *res;
|
|
|
|
res = gdbm_subscript(self, key);
|
|
if (res == NULL && PyErr_ExceptionMatches(PyExc_KeyError)) {
|
|
PyErr_Clear();
|
|
if (gdbm_ass_sub(self, key, default_value) < 0)
|
|
return NULL;
|
|
return gdbm_subscript(self, key);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.close
|
|
|
|
Close the database.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_close_impl(gdbmobject *self)
|
|
/*[clinic end generated code: output=f5abb4d6bb9e52d5 input=0a203447379b45fd]*/
|
|
{
|
|
if (self->di_dbm) {
|
|
gdbm_close(self->di_dbm);
|
|
}
|
|
self->di_dbm = NULL;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/* XXX Should return a set or a set view */
|
|
/*[clinic input]
|
|
_gdbm.gdbm.keys
|
|
|
|
cls: defining_class
|
|
|
|
Get a list of all keys in the database.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_keys_impl(gdbmobject *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=c24b824e81404755 input=1428b7c79703d7d5]*/
|
|
{
|
|
PyObject *v, *item;
|
|
datum key, nextkey;
|
|
int err;
|
|
|
|
_gdbm_state *state = PyType_GetModuleState(cls);
|
|
assert(state != NULL);
|
|
|
|
if (self == NULL || !Py_IS_TYPE(self, state->gdbm_type)) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
check_gdbmobject_open(self, state->gdbm_error);
|
|
|
|
v = PyList_New(0);
|
|
if (v == NULL)
|
|
return NULL;
|
|
|
|
key = gdbm_firstkey(self->di_dbm);
|
|
while (key.dptr) {
|
|
item = PyBytes_FromStringAndSize(key.dptr, key.dsize);
|
|
if (item == NULL) {
|
|
free(key.dptr);
|
|
Py_DECREF(v);
|
|
return NULL;
|
|
}
|
|
err = PyList_Append(v, item);
|
|
Py_DECREF(item);
|
|
if (err != 0) {
|
|
free(key.dptr);
|
|
Py_DECREF(v);
|
|
return NULL;
|
|
}
|
|
nextkey = gdbm_nextkey(self->di_dbm, key);
|
|
free(key.dptr);
|
|
key = nextkey;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static int
|
|
gdbm_contains(PyObject *self, PyObject *arg)
|
|
{
|
|
gdbmobject *dp = (gdbmobject *)self;
|
|
datum key;
|
|
Py_ssize_t size;
|
|
_gdbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
|
|
|
|
if ((dp)->di_dbm == NULL) {
|
|
PyErr_SetString(state->gdbm_error,
|
|
"GDBM object has already been closed");
|
|
return -1;
|
|
}
|
|
if (PyUnicode_Check(arg)) {
|
|
key.dptr = (char *)PyUnicode_AsUTF8AndSize(arg, &size);
|
|
key.dsize = size;
|
|
if (key.dptr == NULL)
|
|
return -1;
|
|
}
|
|
else if (!PyBytes_Check(arg)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"gdbm key must be bytes or string, not %.100s",
|
|
Py_TYPE(arg)->tp_name);
|
|
return -1;
|
|
}
|
|
else {
|
|
key.dptr = PyBytes_AS_STRING(arg);
|
|
key.dsize = PyBytes_GET_SIZE(arg);
|
|
}
|
|
return gdbm_exists(dp->di_dbm, key);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.firstkey
|
|
|
|
cls: defining_class
|
|
|
|
Return the starting key for the traversal.
|
|
|
|
It's possible to loop over every key in the database using this method
|
|
and the nextkey() method. The traversal is ordered by GDBM's internal
|
|
hash values, and won't be sorted by the key values.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_firstkey_impl(gdbmobject *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=139275e9c8b60827 input=ed8782a029a5d299]*/
|
|
{
|
|
PyObject *v;
|
|
datum key;
|
|
_gdbm_state *state = PyType_GetModuleState(cls);
|
|
assert(state != NULL);
|
|
|
|
check_gdbmobject_open(self, state->gdbm_error);
|
|
key = gdbm_firstkey(self->di_dbm);
|
|
if (key.dptr) {
|
|
v = PyBytes_FromStringAndSize(key.dptr, key.dsize);
|
|
free(key.dptr);
|
|
return v;
|
|
}
|
|
else {
|
|
Py_RETURN_NONE;
|
|
}
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.nextkey
|
|
|
|
cls: defining_class
|
|
key: str(accept={str, robuffer}, zeroes=True)
|
|
/
|
|
|
|
Returns the key that follows key in the traversal.
|
|
|
|
The following code prints every key in the database db, without having
|
|
to create a list in memory that contains them all:
|
|
|
|
k = db.firstkey()
|
|
while k is not None:
|
|
print(k)
|
|
k = db.nextkey(k)
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_nextkey_impl(gdbmobject *self, PyTypeObject *cls, const char *key,
|
|
Py_ssize_t key_length)
|
|
/*[clinic end generated code: output=c81a69300ef41766 input=365e297bc0b3db48]*/
|
|
{
|
|
PyObject *v;
|
|
datum dbm_key, nextkey;
|
|
_gdbm_state *state = PyType_GetModuleState(cls);
|
|
assert(state != NULL);
|
|
|
|
dbm_key.dptr = (char *)key;
|
|
dbm_key.dsize = key_length;
|
|
check_gdbmobject_open(self, state->gdbm_error);
|
|
nextkey = gdbm_nextkey(self->di_dbm, dbm_key);
|
|
if (nextkey.dptr) {
|
|
v = PyBytes_FromStringAndSize(nextkey.dptr, nextkey.dsize);
|
|
free(nextkey.dptr);
|
|
return v;
|
|
}
|
|
else {
|
|
Py_RETURN_NONE;
|
|
}
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.reorganize
|
|
|
|
cls: defining_class
|
|
|
|
Reorganize the database.
|
|
|
|
If you have carried out a lot of deletions and would like to shrink
|
|
the space used by the GDBM file, this routine will reorganize the
|
|
database. GDBM will not shorten the length of a database file except
|
|
by using this reorganization; otherwise, deleted file space will be
|
|
kept and reused as new (key,value) pairs are added.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_reorganize_impl(gdbmobject *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=d77c69e8e3dd644a input=e1359faeef844e46]*/
|
|
{
|
|
_gdbm_state *state = PyType_GetModuleState(cls);
|
|
assert(state != NULL);
|
|
check_gdbmobject_open(self, state->gdbm_error);
|
|
errno = 0;
|
|
if (gdbm_reorganize(self->di_dbm) < 0) {
|
|
if (errno != 0)
|
|
PyErr_SetFromErrno(state->gdbm_error);
|
|
else
|
|
PyErr_SetString(state->gdbm_error, gdbm_strerror(gdbm_errno));
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_gdbm.gdbm.sync
|
|
|
|
cls: defining_class
|
|
|
|
Flush the database to the disk file.
|
|
|
|
When the database has been opened in fast mode, this method forces
|
|
any unwritten data to be written to the disk.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_gdbm_gdbm_sync_impl(gdbmobject *self, PyTypeObject *cls)
|
|
/*[clinic end generated code: output=bb680a2035c3f592 input=3d749235f79b6f2a]*/
|
|
{
|
|
_gdbm_state *state = PyType_GetModuleState(cls);
|
|
assert(state != NULL);
|
|
check_gdbmobject_open(self, state->gdbm_error);
|
|
gdbm_sync(self->di_dbm);
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyObject *
|
|
gdbm__enter__(PyObject *self, PyObject *args)
|
|
{
|
|
Py_INCREF(self);
|
|
return self;
|
|
}
|
|
|
|
static PyObject *
|
|
gdbm__exit__(PyObject *self, PyObject *args)
|
|
{
|
|
return _gdbm_gdbm_close_impl((gdbmobject *)self);
|
|
}
|
|
|
|
static PyMethodDef gdbm_methods[] = {
|
|
_GDBM_GDBM_CLOSE_METHODDEF
|
|
_GDBM_GDBM_KEYS_METHODDEF
|
|
_GDBM_GDBM_FIRSTKEY_METHODDEF
|
|
_GDBM_GDBM_NEXTKEY_METHODDEF
|
|
_GDBM_GDBM_REORGANIZE_METHODDEF
|
|
_GDBM_GDBM_SYNC_METHODDEF
|
|
_GDBM_GDBM_GET_METHODDEF
|
|
_GDBM_GDBM_SETDEFAULT_METHODDEF
|
|
{"__enter__", gdbm__enter__, METH_NOARGS, NULL},
|
|
{"__exit__", gdbm__exit__, METH_VARARGS, NULL},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyType_Slot gdbmtype_spec_slots[] = {
|
|
{Py_tp_dealloc, gdbm_dealloc},
|
|
{Py_tp_traverse, gdbm_traverse},
|
|
{Py_tp_methods, gdbm_methods},
|
|
{Py_sq_contains, gdbm_contains},
|
|
{Py_mp_length, gdbm_length},
|
|
{Py_mp_subscript, gdbm_subscript},
|
|
{Py_mp_ass_subscript, gdbm_ass_sub},
|
|
{Py_tp_doc, (char*)gdbm_object__doc__},
|
|
{0, 0}
|
|
};
|
|
|
|
static PyType_Spec gdbmtype_spec = {
|
|
.name = "_gdbm.gdbm",
|
|
.basicsize = sizeof(gdbmobject),
|
|
// Calling PyType_GetModuleState() on a subclass is not safe.
|
|
// dbmtype_spec does not have Py_TPFLAGS_BASETYPE flag
|
|
// which prevents to create a subclass.
|
|
// So calling PyType_GetModuleState() in this file is always safe.
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
|
|
Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = gdbmtype_spec_slots,
|
|
};
|
|
|
|
/* ----------------------------------------------------------------- */
|
|
|
|
/*[clinic input]
|
|
_gdbm.open as dbmopen
|
|
|
|
filename: object
|
|
flags: str="r"
|
|
mode: int(py_default="0o666") = 0o666
|
|
/
|
|
|
|
Open a dbm database and return a dbm object.
|
|
|
|
The filename argument is the name of the database file.
|
|
|
|
The optional flags argument can be 'r' (to open an existing database
|
|
for reading only -- default), 'w' (to open an existing database for
|
|
reading and writing), 'c' (which creates the database if it doesn't
|
|
exist), or 'n' (which always creates a new empty database).
|
|
|
|
Some versions of gdbm support additional flags which must be
|
|
appended to one of the flags described above. The module constant
|
|
'open_flags' is a string of valid additional flags. The 'f' flag
|
|
opens the database in fast mode; altered data will not automatically
|
|
be written to the disk after every change. This results in faster
|
|
writes to the database, but may result in an inconsistent database
|
|
if the program crashes while the database is still open. Use the
|
|
sync() method to force any unwritten data to be written to the disk.
|
|
The 's' flag causes all database operations to be synchronized to
|
|
disk. The 'u' flag disables locking of the database file.
|
|
|
|
The optional mode argument is the Unix mode of the file, used only
|
|
when the database has to be created. It defaults to octal 0o666.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
dbmopen_impl(PyObject *module, PyObject *filename, const char *flags,
|
|
int mode)
|
|
/*[clinic end generated code: output=9527750f5df90764 input=bca6ec81dc49292c]*/
|
|
{
|
|
int iflags;
|
|
_gdbm_state *state = get_gdbm_state(module);
|
|
assert(state != NULL);
|
|
|
|
switch (flags[0]) {
|
|
case 'r':
|
|
iflags = GDBM_READER;
|
|
break;
|
|
case 'w':
|
|
iflags = GDBM_WRITER;
|
|
break;
|
|
case 'c':
|
|
iflags = GDBM_WRCREAT;
|
|
break;
|
|
case 'n':
|
|
iflags = GDBM_NEWDB;
|
|
break;
|
|
default:
|
|
PyErr_SetString(state->gdbm_error,
|
|
"First flag must be one of 'r', 'w', 'c' or 'n'");
|
|
return NULL;
|
|
}
|
|
for (flags++; *flags != '\0'; flags++) {
|
|
char buf[40];
|
|
switch (*flags) {
|
|
#ifdef GDBM_FAST
|
|
case 'f':
|
|
iflags |= GDBM_FAST;
|
|
break;
|
|
#endif
|
|
#ifdef GDBM_SYNC
|
|
case 's':
|
|
iflags |= GDBM_SYNC;
|
|
break;
|
|
#endif
|
|
#ifdef GDBM_NOLOCK
|
|
case 'u':
|
|
iflags |= GDBM_NOLOCK;
|
|
break;
|
|
#endif
|
|
default:
|
|
PyOS_snprintf(buf, sizeof(buf), "Flag '%c' is not supported.",
|
|
*flags);
|
|
PyErr_SetString(state->gdbm_error, buf);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
PyObject *filenamebytes;
|
|
if (!PyUnicode_FSConverter(filename, &filenamebytes)) {
|
|
return NULL;
|
|
}
|
|
|
|
const char *name = PyBytes_AS_STRING(filenamebytes);
|
|
if (strlen(name) != (size_t)PyBytes_GET_SIZE(filenamebytes)) {
|
|
Py_DECREF(filenamebytes);
|
|
PyErr_SetString(PyExc_ValueError, "embedded null character");
|
|
return NULL;
|
|
}
|
|
PyObject *self = newgdbmobject(state, name, iflags, mode);
|
|
Py_DECREF(filenamebytes);
|
|
return self;
|
|
}
|
|
|
|
static const char gdbmmodule_open_flags[] = "rwcn"
|
|
#ifdef GDBM_FAST
|
|
"f"
|
|
#endif
|
|
#ifdef GDBM_SYNC
|
|
"s"
|
|
#endif
|
|
#ifdef GDBM_NOLOCK
|
|
"u"
|
|
#endif
|
|
;
|
|
|
|
static PyMethodDef _gdbm_module_methods[] = {
|
|
DBMOPEN_METHODDEF
|
|
{ 0, 0 },
|
|
};
|
|
|
|
static int
|
|
_gdbm_exec(PyObject *module)
|
|
{
|
|
_gdbm_state *state = get_gdbm_state(module);
|
|
state->gdbm_type = (PyTypeObject *)PyType_FromModuleAndSpec(module,
|
|
&gdbmtype_spec, NULL);
|
|
if (state->gdbm_type == NULL) {
|
|
return -1;
|
|
}
|
|
state->gdbm_error = PyErr_NewException("_gdbm.error", PyExc_OSError, NULL);
|
|
if (state->gdbm_error == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyModule_AddType(module, (PyTypeObject *)state->gdbm_error) < 0) {
|
|
return -1;
|
|
}
|
|
if (PyModule_AddStringConstant(module, "open_flags",
|
|
gdbmmodule_open_flags) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
#if defined(GDBM_VERSION_MAJOR) && defined(GDBM_VERSION_MINOR) && \
|
|
defined(GDBM_VERSION_PATCH)
|
|
PyObject *obj = Py_BuildValue("iii", GDBM_VERSION_MAJOR,
|
|
GDBM_VERSION_MINOR, GDBM_VERSION_PATCH);
|
|
if (obj == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyModule_AddObject(module, "_GDBM_VERSION", obj) < 0) {
|
|
Py_DECREF(obj);
|
|
return -1;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_gdbm_module_traverse(PyObject *module, visitproc visit, void *arg)
|
|
{
|
|
_gdbm_state *state = get_gdbm_state(module);
|
|
Py_VISIT(state->gdbm_error);
|
|
Py_VISIT(state->gdbm_type);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_gdbm_module_clear(PyObject *module)
|
|
{
|
|
_gdbm_state *state = get_gdbm_state(module);
|
|
Py_CLEAR(state->gdbm_error);
|
|
Py_CLEAR(state->gdbm_type);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_gdbm_module_free(void *module)
|
|
{
|
|
_gdbm_module_clear((PyObject *)module);
|
|
}
|
|
|
|
static PyModuleDef_Slot _gdbm_module_slots[] = {
|
|
{Py_mod_exec, _gdbm_exec},
|
|
{0, NULL}
|
|
};
|
|
|
|
static struct PyModuleDef _gdbmmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
.m_name = "_gdbm",
|
|
.m_doc = gdbmmodule__doc__,
|
|
.m_size = sizeof(_gdbm_state),
|
|
.m_methods = _gdbm_module_methods,
|
|
.m_slots = _gdbm_module_slots,
|
|
.m_traverse = _gdbm_module_traverse,
|
|
.m_clear = _gdbm_module_clear,
|
|
.m_free = _gdbm_module_free,
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__gdbm(void)
|
|
{
|
|
return PyModuleDef_Init(&_gdbmmodule);
|
|
}
|