python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Modules/_dbmmodule.c

@@ -0,0 +1,513 @@
+
+/* 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
+
+/*[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 di_size;        /* -1 means recompute */
+    DBM *di_dbm;
+} dbmobject;
+
+#include "clinic/_dbmmodule.c.h"
+
+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;
+
+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*/
+};
+
+/*[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_INCREF(Py_None);
+    return Py_None;
+}
+
+/*[clinic input]
+_dbm.dbm.keys
+
+Return a list of all keys in the database.
+[clinic start generated code]*/
+
+static PyObject *
+_dbm_dbm_keys_impl(dbmobject *self)
+/*[clinic end generated code: output=434549f7c121b33c input=d210ba778cd9c68a]*/
+{
+    PyObject *v, *item;
+    datum key;
+    int err;
+
+    check_dbmobject_open(self);
+    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;
+
+    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
+
+    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, const char *key,
+                  Py_ssize_clean_t key_length, PyObject *default_value)
+/*[clinic end generated code: output=b44f95eba8203d93 input=b788eba0ffad2e91]*/
+/*[clinic end generated code: output=4f5c0e523eaf1251 input=9402c0af8582dc69]*/
+{
+    datum dbm_key, val;
+
+    dbm_key.dptr = (char *)key;
+    dbm_key.dsize = key_length;
+    check_dbmobject_open(self);
+    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
+    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, const char *key,
+                         Py_ssize_clean_t key_length,
+                         PyObject *default_value)
+/*[clinic end generated code: output=52545886cf272161 input=bf40c48edaca01d6]*/
+{
+    datum dbm_key, val;
+    Py_ssize_t tmp_size;
+
+    dbm_key.dptr = (char *)key;
+    dbm_key.dsize = key_length;
+    check_dbmobject_open(self);
+    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 byte 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(DbmError, "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_CallMethodId(self, &PyId_close, NULL);
+}
+
+
+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 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: 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;
+
+    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;
+    }
+
+    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(name, iflags, mode);
+    Py_DECREF(filenamebytes);
+    return self;
+}
+
+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;
+}