diff options
Diffstat (limited to 'Objects/dictobject.c')
| -rw-r--r-- | Objects/dictobject.c | 76 |
1 files changed, 70 insertions, 6 deletions
diff --git a/Objects/dictobject.c b/Objects/dictobject.c index 6f92f67..408bd8f 100644 --- a/Objects/dictobject.c +++ b/Objects/dictobject.c @@ -258,10 +258,11 @@ Restructure the table by allocating a new table and reinserting all items again. When entries have been deleted, the new table may actually be smaller than the old one. */ -static int dictresize Py_PROTO((dictobject *)); +static int dictresize Py_PROTO((dictobject *, int)); static int -dictresize(mp) +dictresize(mp, minused) dictobject *mp; + int minused; { register int oldsize = mp->ma_size; register int newsize, newpoly; @@ -269,14 +270,13 @@ dictresize(mp) register dictentry *newtable; register dictentry *ep; register int i; - newsize = mp->ma_size; for (i = 0, newsize = MINSIZE; ; i++, newsize <<= 1) { if (i > sizeof(polys)/sizeof(polys[0])) { /* Ran out of polynomials */ PyErr_NoMemory(); return -1; } - if (newsize > mp->ma_used*2) { + if (newsize > minused) { newpoly = polys[i]; break; } @@ -366,9 +366,9 @@ PyDict_SetItem(op, key, value) if (hash == -1) return -1; } - /* if fill >= 2/3 size, resize */ + /* if fill >= 2/3 size, double in size */ if (mp->ma_fill*3 >= mp->ma_size*2) { - if (dictresize(mp) != 0) { + if (dictresize(mp, mp->ma_used*2) != 0) { if (mp->ma_fill+1 > mp->ma_size) return -1; } @@ -674,6 +674,68 @@ dict_items(mp, args) return v; } +static PyObject * +dict_absorb(mp, args) + register dictobject *mp; + PyObject *args; +{ + register int i; + dictobject *other; + dictentry *entry; + if (!PyArg_Parse(args, "O!", &PyDict_Type, &other)) + return NULL; + if (other == mp) + goto done; /* a.absorb(a); nothing to do */ + /* Do one big resize at the start, rather than incrementally + resizing as we insert new items. Expect that there will be + no (or few) overlapping keys. */ + if ((mp->ma_fill + other->ma_used)*3 >= mp->ma_size*2) { + if (dictresize(mp, (mp->ma_used + other->ma_used)*3/2) != 0) + return NULL; + } + for (i = 0; i < other->ma_size; i++) { + entry = &other->ma_table[i]; + if (entry->me_value != NULL) { + Py_INCREF(entry->me_key); + Py_INCREF(entry->me_value); + insertdict(mp, entry->me_key, entry->me_hash, + entry->me_value); + } + } + done: + Py_INCREF(Py_None); + return Py_None; +} + +static PyObject * +dict_copy(mp, args) + register dictobject *mp; + PyObject *args; +{ + register int i; + dictobject *copy; + dictentry *entry; + if (!PyArg_Parse(args, "")) + return NULL; + copy = (dictobject *)PyDict_New(); + if (copy == NULL) + return NULL; + if (mp->ma_used > 0) { + if (dictresize(copy, mp->ma_used*3/2) != 0) + return NULL; + for (i = 0; i < mp->ma_size; i++) { + entry = &mp->ma_table[i]; + if (entry->me_value != NULL) { + Py_INCREF(entry->me_key); + Py_INCREF(entry->me_value); + insertdict(copy, entry->me_key, entry->me_hash, + entry->me_value); + } + } + } + return (PyObject *)copy; +} + int PyDict_Size(mp) PyObject *mp; @@ -901,7 +963,9 @@ dict_clear(mp, args) } static PyMethodDef mapp_methods[] = { + {"absorb", (PyCFunction)dict_absorb}, {"clear", (PyCFunction)dict_clear}, + {"copy", (PyCFunction)dict_copy}, {"has_key", (PyCFunction)dict_has_key}, {"items", (PyCFunction)dict_items}, {"keys", (PyCFunction)dict_keys}, |