diff options
Diffstat (limited to 'Objects/classobject.c')
| -rw-r--r-- | Objects/classobject.c | 68 |
1 files changed, 60 insertions, 8 deletions
diff --git a/Objects/classobject.c b/Objects/classobject.c index 95b85f5..823e397 100644 --- a/Objects/classobject.c +++ b/Objects/classobject.c @@ -261,7 +261,7 @@ instance_setattr(inst, name, v) return dictinsert(inst->in_attr, name, v); } -object * +static object * instance_repr(inst) instanceobject *inst; { @@ -280,7 +280,7 @@ instance_repr(inst) return res; } -int +static int instance_compare(inst, other) instanceobject *inst, *other; { @@ -311,7 +311,43 @@ instance_compare(inst, other) return outcome; } -int +static long +instance_hash(inst) + instanceobject *inst; +{ + object *func; + object *res; + int outcome; + + func = instance_getattr(inst, "__hash__"); + if (func == NULL) { + /* If there is no __cmp__ method, we hash on the address. + If a __cmp__ method exists, there must be a __hash__. */ + err_clear(); + func = instance_getattr(inst, "__cmp__"); + if (func == NULL) + return (long)inst; + err_setstr(TypeError, "unhashable instance"); + return -1; + } + res = call_object(func, (object *)NULL); + DECREF(func); + if (res == NULL) + return -1; + if (is_intobject(res)) { + outcome = getintvalue(res); + if (outcome == -1) + outcome = -2; + } + else { + err_setstr(TypeError, "__hash__() should return an int"); + outcome = -1; + } + DECREF(res); + return outcome; +} + +static int instance_length(inst) instanceobject *inst; { @@ -339,7 +375,7 @@ instance_length(inst) return outcome; } -object * +static object * instance_subscript(inst, key) instanceobject *inst; object *key; @@ -362,7 +398,7 @@ instance_subscript(inst, key) return res; } -int +static int instance_ass_subscript(inst, key, value) instanceobject*inst; object *key; @@ -395,7 +431,7 @@ instance_ass_subscript(inst, key, value) return 0; } -mapping_methods instance_as_mapping = { +static mapping_methods instance_as_mapping = { instance_length, /*mp_length*/ instance_subscript, /*mp_subscript*/ instance_ass_subscript, /*mp_ass_subscript*/ @@ -612,7 +648,7 @@ UNARY(instance_neg, "__neg__") UNARY(instance_pos, "__pos__") UNARY(instance_abs, "__abs__") -int +static int instance_nonzero(self) instanceobject *self; { @@ -739,9 +775,10 @@ typeobject Instancetype = { &instance_as_number, /*tp_as_number*/ &instance_as_sequence, /*tp_as_sequence*/ &instance_as_mapping, /*tp_as_mapping*/ + instance_hash, /*tp_hash*/ }; -object * +static object * instance_convert(inst, methodname) object *inst; char *methodname; @@ -837,6 +874,20 @@ instancemethod_compare(a, b) return cmp; } +static long +instancemethod_hash(a) + instancemethodobject *a; +{ + long x, y; + x = hashobject(a->im_self); + if (x == -1) + return -1; + y = hashobject(a->im_func); + if (y == -1) + return -1; + return x ^ y; +} + typeobject Instancemethodtype = { OB_HEAD_INIT(&Typetype) 0, @@ -852,4 +903,5 @@ typeobject Instancemethodtype = { 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ + instancemethod_hash, /*tp_hash*/ }; |