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Name	Size	Permission	Date
_blake2	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_ctypes	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_decimal	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_io	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_multiprocessing	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_sha3	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_sqlite	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_ssl	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
_xxtestfuzz	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
cjkcodecs	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
clinic	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
expat	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
README	112 B	-rw-r--r--	2024-03-19 22:46
Setup	15.15 KB	-rw-r--r--	2024-03-19 22:46
Setup.local	41 B	-rw-r--r--	2025-06-04 09:17
_abc.c	26.09 KB	-rw-r--r--	2024-03-19 22:46
_abc.gcda	8.21 KB	-rw-r--r--	2025-06-04 09:21
_abc.o	228.27 KB	-rw-r--r--	2025-06-04 09:22
_asynciomodule.c	88.39 KB	-rw-r--r--	2024-03-19 22:46
_bisectmodule.c	8.03 KB	-rw-r--r--	2024-03-19 22:46
_bz2module.c	23.65 KB	-rw-r--r--	2024-03-19 22:46
_codecsmodule.c	32.8 KB	-rw-r--r--	2024-03-19 22:46
_codecsmodule.gcda	13.72 KB	-rw-r--r--	2025-06-04 09:21
_codecsmodule.o	374.94 KB	-rw-r--r--	2025-06-04 09:22
_collectionsmodule.c	79.83 KB	-rw-r--r--	2024-03-19 22:46
_collectionsmodule.gcda	14.42 KB	-rw-r--r--	2025-06-04 09:21
_collectionsmodule.o	325.15 KB	-rw-r--r--	2025-06-04 09:22
_contextvarsmodule.c	1.57 KB	-rw-r--r--	2024-03-19 22:46
_cryptmodule.c	1.66 KB	-rw-r--r--	2024-03-19 22:46
_csv.c	50.09 KB	-rw-r--r--	2024-03-19 22:46
_curses_panel.c	18.6 KB	-rw-r--r--	2024-03-19 22:46
_cursesmodule.c	135.6 KB	-rw-r--r--	2024-03-19 22:46
_datetimemodule.c	219.13 KB	-rw-r--r--	2024-03-19 22:46
_dbmmodule.c	14.9 KB	-rw-r--r--	2024-03-19 22:46
_elementtree.c	124.95 KB	-rw-r--r--	2024-03-19 22:46
_functoolsmodule.c	45.07 KB	-rw-r--r--	2024-03-19 22:46
_functoolsmodule.gcda	11.74 KB	-rw-r--r--	2025-06-04 09:21
_functoolsmodule.o	268.69 KB	-rw-r--r--	2025-06-04 09:22
_gdbmmodule.c	21.25 KB	-rw-r--r--	2024-03-19 22:46
_hashopenssl.c	59.7 KB	-rw-r--r--	2024-03-19 22:46
_heapqmodule.c	21.78 KB	-rw-r--r--	2024-03-19 22:46
_iomodule.gcda	6.99 KB	-rw-r--r--	2025-06-04 09:21
_iomodule.o	186.38 KB	-rw-r--r--	2025-06-04 09:22
_json.c	57.57 KB	-rw-r--r--	2024-03-19 22:46
_localemodule.c	22.29 KB	-rw-r--r--	2024-03-19 22:46
_localemodule.gcda	8.57 KB	-rw-r--r--	2025-06-04 09:21
_localemodule.o	181.06 KB	-rw-r--r--	2025-06-04 09:22
_lsprof.c	25.89 KB	-rw-r--r--	2024-03-19 22:46
_lzmamodule.c	48.65 KB	-rw-r--r--	2024-03-19 22:46
_math.c	7.33 KB	-rw-r--r--	2024-03-19 22:46
_math.gcda	2.29 KB	-rw-r--r--	2025-06-04 09:21
_math.h	1007 B	-rw-r--r--	2024-03-19 22:46
_math.o	32.3 KB	-rw-r--r--	2025-06-04 09:22
_opcode.c	2.14 KB	-rw-r--r--	2024-03-19 22:46
_operator.c	46.15 KB	-rw-r--r--	2024-03-19 22:46
_operator.gcda	13.14 KB	-rw-r--r--	2025-06-04 09:21
_operator.o	333.74 KB	-rw-r--r--	2025-06-04 09:22
_pickle.c	229.53 KB	-rw-r--r--	2024-03-19 22:46
_posixsubprocess.c	36.98 KB	-rw-r--r--	2024-03-19 22:46
_queuemodule.c	12.31 KB	-rw-r--r--	2024-03-19 22:46
_randommodule.c	17.76 KB	-rw-r--r--	2024-03-19 22:46
_scproxy.c	6.08 KB	-rw-r--r--	2024-03-19 22:46
_sre.c	79.74 KB	-rw-r--r--	2024-03-19 22:46
_sre.gcda	34.64 KB	-rw-r--r--	2025-06-04 09:21
_sre.o	975.16 KB	-rw-r--r--	2025-06-04 09:22
_ssl.c	186.63 KB	-rw-r--r--	2024-03-19 22:46
_ssl.h	2.08 KB	-rw-r--r--	2024-03-19 22:46
_ssl_data.h	203.14 KB	-rw-r--r--	2024-03-19 22:46
_ssl_data_111.h	208.74 KB	-rw-r--r--	2024-03-19 22:46
_ssl_data_300.h	275.25 KB	-rw-r--r--	2024-03-19 22:46
_stat.c	15.18 KB	-rw-r--r--	2024-03-19 22:46
_stat.gcda	5.7 KB	-rw-r--r--	2025-06-04 09:21
_stat.o	69.77 KB	-rw-r--r--	2025-06-04 09:22
_statisticsmodule.c	4.83 KB	-rw-r--r--	2024-03-19 22:46
_struct.c	68.85 KB	-rw-r--r--	2024-03-19 22:46
_testbuffer.c	82.19 KB	-rw-r--r--	2024-03-19 22:46
_testcapimodule.c	217.47 KB	-rw-r--r--	2024-03-19 22:46
_testclinic.c	22.92 KB	-rw-r--r--	2024-03-19 22:46
_testimportmultiple.c	1.1 KB	-rw-r--r--	2024-03-19 22:46
_testinternalcapi.c	10.76 KB	-rw-r--r--	2024-03-19 22:46
_testmultiphase.c	23.38 KB	-rw-r--r--	2024-03-19 22:46
_threadmodule.c	50.27 KB	-rw-r--r--	2024-03-19 22:46
_threadmodule.gcda	10.46 KB	-rw-r--r--	2025-06-04 09:21
_threadmodule.o	250.8 KB	-rw-r--r--	2025-06-04 09:22
_tkinter.c	93.36 KB	-rw-r--r--	2024-03-19 22:46
_tracemalloc.c	44.86 KB	-rw-r--r--	2024-03-19 22:46
_tracemalloc.gcda	12.51 KB	-rw-r--r--	2025-06-04 09:21
_tracemalloc.o	262.77 KB	-rw-r--r--	2025-06-04 09:22
_uuidmodule.c	3 KB	-rw-r--r--	2024-03-19 22:46
_weakref.c	4.92 KB	-rw-r--r--	2024-03-19 22:46
_weakref.gcda	4.24 KB	-rw-r--r--	2025-06-04 09:21
_weakref.o	84.91 KB	-rw-r--r--	2025-06-04 09:22
_winapi.c	66.78 KB	-rw-r--r--	2024-03-19 22:46
_xxsubinterpretersmodule.c	67.74 KB	-rw-r--r--	2024-03-19 22:46
_zoneinfo.c	73.89 KB	-rw-r--r--	2024-03-19 22:46
addrinfo.h	5.88 KB	-rw-r--r--	2024-03-19 22:46
arraymodule.c	87.46 KB	-rw-r--r--	2024-03-19 22:46
atexitmodule.c	7.29 KB	-rw-r--r--	2024-03-19 22:46
atexitmodule.gcda	4.45 KB	-rw-r--r--	2025-06-04 09:21
atexitmodule.o	97.11 KB	-rw-r--r--	2025-06-04 09:22
audioop.c	59.71 KB	-rw-r--r--	2024-03-19 22:46
binascii.c	54.76 KB	-rw-r--r--	2024-03-19 22:46
bufferedio.gcda	20.46 KB	-rw-r--r--	2025-06-04 09:21
bufferedio.o	414.2 KB	-rw-r--r--	2025-06-04 09:22
bytesio.gcda	10.84 KB	-rw-r--r--	2025-06-04 09:21
bytesio.o	220.71 KB	-rw-r--r--	2025-06-04 09:22
cmathmodule.c	42.3 KB	-rw-r--r--	2024-03-19 22:46
config.c	3.21 KB	-rw-r--r--	2025-06-04 09:17
config.c.in	1.58 KB	-rw-r--r--	2024-03-19 22:46
config.o	34.5 KB	-rw-r--r--	2025-06-04 09:22
errnomodule.c	27.08 KB	-rw-r--r--	2024-03-19 22:46
errnomodule.gcda	8.02 KB	-rw-r--r--	2025-06-04 09:21
errnomodule.o	113.31 KB	-rw-r--r--	2025-06-04 09:22
faulthandler.c	40.52 KB	-rw-r--r--	2024-03-19 22:46
faulthandler.gcda	9.1 KB	-rw-r--r--	2025-06-04 09:21
faulthandler.o	147.28 KB	-rw-r--r--	2025-06-04 09:22
fcntlmodule.c	20.49 KB	-rw-r--r--	2024-03-19 22:46
fileio.gcda	9.01 KB	-rw-r--r--	2025-06-04 09:21
fileio.o	227.98 KB	-rw-r--r--	2025-06-04 09:22
gc_weakref.txt	11.19 KB	-rw-r--r--	2024-03-19 22:46
gcmodule.c	77.27 KB	-rw-r--r--	2024-03-19 22:46
gcmodule.gcda	11.63 KB	-rw-r--r--	2025-06-04 09:21
gcmodule.o	306.44 KB	-rw-r--r--	2025-06-04 09:22
getaddrinfo.c	18.38 KB	-rw-r--r--	2024-03-19 22:46
getbuildinfo.c	1.28 KB	-rw-r--r--	2024-03-19 22:46
getbuildinfo.gcda	3.59 KB	-rw-r--r--	2025-06-04 09:21
getbuildinfo.o	33.84 KB	-rw-r--r--	2025-06-04 09:22
getnameinfo.c	6.18 KB	-rw-r--r--	2024-03-19 22:46
getpath.c	44.99 KB	-rw-r--r--	2024-03-19 22:46
getpath.gcda	8.82 KB	-rw-r--r--	2025-06-04 09:21
getpath.o	160.52 KB	-rw-r--r--	2025-06-04 09:22
grpmodule.c	8.52 KB	-rw-r--r--	2024-03-19 22:46
hashlib.h	2.09 KB	-rw-r--r--	2024-03-19 22:46
iobase.gcda	9.63 KB	-rw-r--r--	2025-06-04 09:21
iobase.o	189.36 KB	-rw-r--r--	2025-06-04 09:22
itertoolsmodule.c	153.67 KB	-rw-r--r--	2024-03-19 22:46
itertoolsmodule.gcda	27.9 KB	-rw-r--r--	2025-06-04 09:21
itertoolsmodule.o	721.27 KB	-rw-r--r--	2025-06-04 09:22
ld_so_aix	6.12 KB	-rwxr-xr-x	2025-06-04 09:17
ld_so_aix.in	6.11 KB	-rw-r--r--	2024-03-19 22:46
main.c	17.65 KB	-rw-r--r--	2024-03-19 22:46
main.gcda	7.28 KB	-rw-r--r--	2025-06-04 09:21
main.o	147.24 KB	-rw-r--r--	2025-06-04 09:22
makesetup	7.67 KB	-rwxr-xr-x	2024-03-19 22:46
makexp_aix	2.67 KB	-rwxr-xr-x	2024-03-19 22:46
mathmodule.c	106.2 KB	-rw-r--r--	2024-03-19 22:46
md5module.c	15.51 KB	-rw-r--r--	2024-03-19 22:46
mmapmodule.c	47.75 KB	-rw-r--r--	2024-03-19 22:46
nismodule.c	12.89 KB	-rw-r--r--	2024-03-19 22:46
ossaudiodev.c	37.49 KB	-rw-r--r--	2024-03-19 22:46
overlapped.c	53.65 KB	-rw-r--r--	2024-03-19 22:46
posixmodule.c	413.46 KB	-rw-r--r--	2024-03-19 22:46
posixmodule.gcda	67.8 KB	-rw-r--r--	2025-06-04 09:21
posixmodule.h	791 B	-rw-r--r--	2024-03-19 22:46
posixmodule.o	1.49 MB	-rw-r--r--	2025-06-04 09:22
pwdmodule.c	8.89 KB	-rw-r--r--	2024-03-19 22:46
pwdmodule.gcda	4.96 KB	-rw-r--r--	2025-06-04 09:21
pwdmodule.o	84.35 KB	-rw-r--r--	2025-06-04 09:22
pyexpat.c	60.39 KB	-rw-r--r--	2024-03-19 22:46
readline.c	40.06 KB	-rw-r--r--	2024-03-19 22:46
resource.c	13.77 KB	-rw-r--r--	2024-03-19 22:46
rotatingtree.c	3.39 KB	-rw-r--r--	2024-03-19 22:46
rotatingtree.h	924 B	-rw-r--r--	2024-03-19 22:46
selectmodule.c	70.06 KB	-rw-r--r--	2024-03-19 22:46
sha1module.c	14.76 KB	-rw-r--r--	2024-03-19 22:46
sha256module.c	22.5 KB	-rw-r--r--	2024-03-19 22:46
sha512module.c	27.29 KB	-rw-r--r--	2024-03-19 22:46
signalmodule.c	52.45 KB	-rw-r--r--	2024-03-19 22:46
signalmodule.gcda	11.11 KB	-rw-r--r--	2025-06-04 09:21
signalmodule.o	235.02 KB	-rw-r--r--	2025-06-04 09:22
socketmodule.c	243.34 KB	-rw-r--r--	2024-03-19 22:46
socketmodule.h	8.56 KB	-rw-r--r--	2024-03-19 22:46
spwdmodule.c	6.69 KB	-rw-r--r--	2024-03-19 22:46
sre.h	2.83 KB	-rw-r--r--	2024-03-19 22:46
sre_constants.h	2.81 KB	-rw-r--r--	2024-03-19 22:46
sre_lib.h	52.08 KB	-rw-r--r--	2024-03-19 22:46
stringio.gcda	9.64 KB	-rw-r--r--	2025-06-04 09:21
stringio.o	193.45 KB	-rw-r--r--	2025-06-04 09:22
symtablemodule.c	3.67 KB	-rw-r--r--	2024-03-19 22:46
symtablemodule.gcda	4.25 KB	-rw-r--r--	2025-06-04 09:21
symtablemodule.o	55.01 KB	-rw-r--r--	2025-06-04 09:22
syslogmodule.c	10.64 KB	-rw-r--r--	2024-03-19 22:46
termios.c	22.52 KB	-rw-r--r--	2024-03-19 22:46
testcapi_long.h	6.77 KB	-rw-r--r--	2024-03-19 22:46
textio.gcda	23.51 KB	-rw-r--r--	2025-06-04 09:21
textio.o	645.09 KB	-rw-r--r--	2025-06-04 09:22
timemodule.c	57.23 KB	-rw-r--r--	2024-03-19 22:46
timemodule.gcda	8.3 KB	-rw-r--r--	2025-06-04 09:21
timemodule.o	177.2 KB	-rw-r--r--	2025-06-04 09:22
tkappinit.c	4.71 KB	-rw-r--r--	2024-03-19 22:46
tkinter.h	881 B	-rw-r--r--	2024-03-19 22:46
unicodedata.c	44.69 KB	-rw-r--r--	2024-03-19 22:46
unicodedata_db.h	531.75 KB	-rw-r--r--	2024-03-19 22:46
unicodename_db.h	2.12 MB	-rw-r--r--	2024-03-19 22:46
winreparse.h	1.59 KB	-rw-r--r--	2024-03-19 22:46
xxlimited.c	9.23 KB	-rw-r--r--	2024-03-19 22:46
xxlimited_35.c	6.88 KB	-rw-r--r--	2024-03-19 22:46
xxmodule.c	12.56 KB	-rw-r--r--	2024-03-19 22:46
xxsubtype.c	10.78 KB	-rw-r--r--	2024-03-19 22:46
xxsubtype.gcda	4.45 KB	-rw-r--r--	2025-06-04 09:21
xxsubtype.o	54.38 KB	-rw-r--r--	2025-06-04 09:22
zlibmodule.c	46.52 KB	-rw-r--r--	2024-03-19 22:46

Rename

/* 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 const char which_dbm[] = "GNU gdbm";  /* EMX port of GDBM */
#elif defined(HAVE_GDBM_NDBM_H)
#include <gdbm/ndbm.h>
static const char which_dbm[] = "GNU gdbm";
#elif defined(HAVE_GDBM_DASH_NDBM_H)
#include <gdbm-ndbm.h>
static const char which_dbm[] = "GNU gdbm";
#elif defined(HAVE_BERKDB_H)
#include <db.h>
static const char which_dbm[] = "Berkeley DB";
#else
#error "No ndbm.h available!"
#endif

typedef struct {
    PyTypeObject *dbm_type;
    PyObject *dbm_error;
} _dbm_state;

static inline _dbm_state*
get_dbm_state(PyObject *module)
{
    void *state = PyModule_GetState(module);
    assert(state != NULL);
    return (_dbm_state *)state;
}

/*[clinic input]
module _dbm
class _dbm.dbm "dbmobject *" "&Dbmtype"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=9b1aa8756d16150e]*/

typedef struct {
    PyObject_HEAD
    int flags;
    int di_size;        /* -1 means recompute */
    DBM *di_dbm;
} dbmobject;

#include "clinic/_dbmmodule.c.h"

#define check_dbmobject_open(v, err)                                \
    if ((v)->di_dbm == NULL) {                                      \
        PyErr_SetString(err, "DBM object has already been closed"); \
        return NULL;                                                \
    }

static PyObject *
newdbmobject(_dbm_state *state, const char *file, int flags, int mode)
{
    dbmobject *dp = PyObject_GC_New(dbmobject, state->dbm_type);
    if (dp == NULL) {
        return NULL;
    }
    dp->di_size = -1;
    dp->flags = flags;
    PyObject_GC_Track(dp);

/* See issue #19296 */
    if ( (dp->di_dbm = dbm_open((char *)file, flags, mode)) == 0 ) {
        PyErr_SetFromErrnoWithFilename(state->dbm_error, file);
        Py_DECREF(dp);
        return NULL;
    }
    return (PyObject *)dp;
}

/* Methods */
static int
dbm_traverse(dbmobject *dp, visitproc visit, void *arg)
{
    Py_VISIT(Py_TYPE(dp));
    return 0;
}

static void
dbm_dealloc(dbmobject *dp)
{
    PyObject_GC_UnTrack(dp);
    if (dp->di_dbm) {
        dbm_close(dp->di_dbm);
    }
    PyTypeObject *tp = Py_TYPE(dp);
    tp->tp_free(dp);
    Py_DECREF(tp);
}

static Py_ssize_t
dbm_length(dbmobject *dp)
{
    _dbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
    assert(state != NULL);
    if (dp->di_dbm == NULL) {
             PyErr_SetString(state->dbm_error, "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;
    _dbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
    assert(state != NULL);
    if (!PyArg_Parse(key, "s#", &krec.dptr, &tmp_size)) {
        return NULL;
    }

krec.dsize = tmp_size;
    check_dbmobject_open(dp, state->dbm_error);
    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(state->dbm_error, "");
        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;
    }
    _dbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
    assert(state != NULL);
    krec.dsize = tmp_size;
    if (dp->di_dbm == NULL) {
             PyErr_SetString(state->dbm_error, "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);
            /* we might get a failure for reasons like file corrupted,
               but we are not able to distinguish it */
            if (dp->flags & O_RDWR) {
                PyErr_SetObject(PyExc_KeyError, v);
            }
            else {
                PyErr_SetString(state->dbm_error, "cannot delete item from database");
            }
            return -1;
        }
    } else {
        if ( !PyArg_Parse(w, "s#", &drec.dptr, &tmp_size) ) {
            PyErr_SetString(PyExc_TypeError,
                 "dbm mappings have bytes 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(state->dbm_error,
                            "cannot add item to database");
            return -1;
        }
    }
    if ( dbm_error(dp->di_dbm) ) {
        dbm_clearerr(dp->di_dbm);
        PyErr_SetString(state->dbm_error, "");
        return -1;
    }
    return 0;
}

/*[clinic input]
_dbm.dbm.close

Close the database.
[clinic start generated code]*/

static PyObject *
_dbm_dbm_close_impl(dbmobject *self)
/*[clinic end generated code: output=c8dc5b6709600b86 input=046db72377d51be8]*/
{
    if (self->di_dbm) {
        dbm_close(self->di_dbm);
    }
    self->di_dbm = NULL;
    Py_RETURN_NONE;
}

/*[clinic input]
_dbm.dbm.keys

cls: defining_class

Return a list of all keys in the database.
[clinic start generated code]*/

static PyObject *
_dbm_dbm_keys_impl(dbmobject *self, PyTypeObject *cls)
/*[clinic end generated code: output=f2a593b3038e5996 input=d3706a28fc051097]*/
{
    PyObject *v, *item;
    datum key;
    int err;

_dbm_state *state = PyType_GetModuleState(cls);
    assert(state != NULL);
    check_dbmobject_open(self, state->dbm_error);
    v = PyList_New(0);
    if (v == NULL) {
        return NULL;
    }
    for (key = dbm_firstkey(self->di_dbm); key.dptr;
         key = dbm_nextkey(self->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;

_dbm_state *state = PyType_GetModuleState(Py_TYPE(dp));
    assert(state != NULL);
    if ((dp)->di_dbm == NULL) {
        PyErr_SetString(state->dbm_error,
                        "DBM 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,
                     "dbm 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);
    }
    val = dbm_fetch(dp->di_dbm, key);
    return val.dptr != NULL;
}

/*[clinic input]
_dbm.dbm.get
    cls: defining_class
    key: str(accept={str, robuffer}, zeroes=True)
    default: object = None
    /

Return the value for key if present, otherwise default.
[clinic start generated code]*/

static PyObject *
_dbm_dbm_get_impl(dbmobject *self, PyTypeObject *cls, const char *key,
                  Py_ssize_clean_t key_length, PyObject *default_value)
/*[clinic end generated code: output=34851b5dc1c664dc input=66b993b8349fa8c1]*/
{
    datum dbm_key, val;
    _dbm_state *state = PyType_GetModuleState(cls);
    assert(state != NULL);
    dbm_key.dptr = (char *)key;
    dbm_key.dsize = key_length;
    check_dbmobject_open(self, state->dbm_error);
    val = dbm_fetch(self->di_dbm, dbm_key);
    if (val.dptr != NULL) {
        return PyBytes_FromStringAndSize(val.dptr, val.dsize);
    }

Py_INCREF(default_value);
    return default_value;
}

/*[clinic input]
_dbm.dbm.setdefault
    cls: defining_class
    key: str(accept={str, robuffer}, zeroes=True)
    default: object(c_default="NULL") = b''
    /

Return the value for key if present, otherwise default.

If key is not in the database, it is inserted with default as the value.
[clinic start generated code]*/

static PyObject *
_dbm_dbm_setdefault_impl(dbmobject *self, PyTypeObject *cls, const char *key,
                         Py_ssize_clean_t key_length,
                         PyObject *default_value)
/*[clinic end generated code: output=d5c68fe673886767 input=126a3ff15c5f8232]*/
{
    datum dbm_key, val;
    Py_ssize_t tmp_size;
    _dbm_state *state = PyType_GetModuleState(cls);
    assert(state != NULL);
    dbm_key.dptr = (char *)key;
    dbm_key.dsize = key_length;
    check_dbmobject_open(self, state->dbm_error);
    val = dbm_fetch(self->di_dbm, dbm_key);
    if (val.dptr != NULL) {
        return PyBytes_FromStringAndSize(val.dptr, val.dsize);
    }
    if (default_value == NULL) {
        default_value = PyBytes_FromStringAndSize(NULL, 0);
        if (default_value == NULL) {
            return NULL;
        }
        val.dptr = NULL;
        val.dsize = 0;
    }
    else {
        if ( !PyArg_Parse(default_value, "s#", &val.dptr, &tmp_size) ) {
            PyErr_SetString(PyExc_TypeError,
                "dbm mappings have bytes or string elements only");
            return NULL;
        }
        val.dsize = tmp_size;
        Py_INCREF(default_value);
    }
    if (dbm_store(self->di_dbm, dbm_key, val, DBM_INSERT) < 0) {
        dbm_clearerr(self->di_dbm);
        PyErr_SetString(state->dbm_error, "cannot add item to database");
        Py_DECREF(default_value);
        return NULL;
    }
    return default_value;
}

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_CallMethodIdNoArgs(self, &PyId_close);
}

static PyMethodDef dbm_methods[] = {
    _DBM_DBM_CLOSE_METHODDEF
    _DBM_DBM_KEYS_METHODDEF
    _DBM_DBM_GET_METHODDEF
    _DBM_DBM_SETDEFAULT_METHODDEF
    {"__enter__", dbm__enter__, METH_NOARGS, NULL},
    {"__exit__",  dbm__exit__, METH_VARARGS, NULL},
    {NULL,  NULL}           /* sentinel */
};

static PyType_Slot dbmtype_spec_slots[] = {
    {Py_tp_dealloc, dbm_dealloc},
    {Py_tp_traverse, dbm_traverse},
    {Py_tp_methods, dbm_methods},
    {Py_sq_contains, dbm_contains},
    {Py_mp_length, dbm_length},
    {Py_mp_subscript, dbm_subscript},
    {Py_mp_ass_subscript, dbm_ass_sub},
    {0, 0}
};

static PyType_Spec dbmtype_spec = {
    .name = "_dbm.dbm",
    .basicsize = sizeof(dbmobject),
    // 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 = dbmtype_spec_slots,
};

/* ----------------------------------------------------------------- */

/*[clinic input]

_dbm.open as dbmopen

filename: unicode
        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]*/

static PyObject *
dbmopen_impl(PyObject *module, PyObject *filename, const char *flags,
             int mode)
/*[clinic end generated code: output=9527750f5df90764 input=376a9d903a50df59]*/
{
    int iflags;
    _dbm_state *state =  get_dbm_state(module);
    assert(state != NULL);
    if (strcmp(flags, "r") == 0) {
        iflags = O_RDONLY;
    }
    else if (strcmp(flags, "w") == 0) {
        iflags = O_RDWR;
    }
    else if (strcmp(flags, "rw") == 0) {
        /* Backward compatibility */
        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(state->dbm_error,
                        "arg 2 to open should be 'r', 'w', 'c', or 'n'");
        return NULL;
    }

PyObject *filenamebytes = PyUnicode_EncodeFSDefault(filename);
    if (filenamebytes == NULL) {
        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 = newdbmobject(state, name, iflags, mode);
    Py_DECREF(filenamebytes);
    return self;
}

static PyMethodDef dbmmodule_methods[] = {
    DBMOPEN_METHODDEF
    { 0, 0 },
};

static int
_dbm_exec(PyObject *module)
{
    _dbm_state *state = get_dbm_state(module);
    state->dbm_type = (PyTypeObject *)PyType_FromModuleAndSpec(module,
                                                        &dbmtype_spec, NULL);
    if (state->dbm_type == NULL) {
        return -1;
    }
    state->dbm_error = PyErr_NewException("_dbm.error", PyExc_OSError, NULL);
    if (state->dbm_error == NULL) {
        return -1;
    }
    if (PyModule_AddStringConstant(module, "library", which_dbm) < 0) {
        return -1;
    }
    if (PyModule_AddType(module, (PyTypeObject *)state->dbm_error) < 0) {
        return -1;
    }
    return 0;
}

static int
_dbm_module_traverse(PyObject *module, visitproc visit, void *arg)
{
    _dbm_state *state = get_dbm_state(module);
    Py_VISIT(state->dbm_error);
    Py_VISIT(state->dbm_type);
    return 0;
}

static int
_dbm_module_clear(PyObject *module)
{
    _dbm_state *state = get_dbm_state(module);
    Py_CLEAR(state->dbm_error);
    Py_CLEAR(state->dbm_type);
    return 0;
}

static void
_dbm_module_free(void *module)
{
    _dbm_module_clear((PyObject *)module);
}

static PyModuleDef_Slot _dbmmodule_slots[] = {
    {Py_mod_exec, _dbm_exec},
    {0, NULL}
};

static struct PyModuleDef _dbmmodule = {
    PyModuleDef_HEAD_INIT,
    .m_name = "_dbm",
    .m_size = sizeof(_dbm_state),
    .m_methods = dbmmodule_methods,
    .m_slots = _dbmmodule_slots,
    .m_traverse = _dbm_module_traverse,
    .m_clear = _dbm_module_clear,
    .m_free = _dbm_module_free,
};

PyMODINIT_FUNC
PyInit__dbm(void)
{
    return PyModuleDef_Init(&_dbmmodule);
}