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* Include/classobject.h, Objects/classobject.c, Python/ceval.c:
entirely redone operator overloading. The rules for class instances are now much more relaxed than for other built-in types (whose coerce must still return two objects of the same type) * Objects/floatobject.c: add overflow check when converting float to int and implement truncation towards zero using ceil/float * Objects/longobject.c: change ValueError to OverflowError when converting to int * Objects/rangeobject.c: modernized * Objects/stringobject.c: use HAVE_LIMITS instead of __STDC__ * Objects/xxobject.c: changed to use new style (not finished?)
This commit is contained in:
Guido van Rossum
parent
2929527aed
commit
03093a248d
6 changed files with 220 additions and 205 deletions
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@ -25,9 +25,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/* Class object implementation */
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#include "allobjects.h"
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#include "modsupport.h"
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#include "structmember.h"
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#include "ceval.h"
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/* Forward */
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static object *class_lookup PROTO((classobject *, char *, classobject **));
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@ -520,33 +518,22 @@ instance_repr(inst)
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static int
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instance_compare(inst, other)
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instanceobject *inst, *other;
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object *inst, *other;
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{
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object *func;
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object *res;
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object *result;
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int outcome;
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func = instance_getattr(inst, "__cmp__");
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if (func == NULL) {
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err_clear();
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if (inst < other)
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return -1;
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if (inst > other)
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return 1;
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return 0;
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}
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res = call_object(func, (object *)other);
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DECREF(func);
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if (res == NULL) {
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err_clear(); /* XXX Should report the error, bot how...??? */
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return 0;
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}
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if (is_intobject(res))
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outcome = getintvalue(res);
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else
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outcome = 0; /* XXX Should report the error, bot how...??? */
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DECREF(res);
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return outcome;
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result = instancebinop(inst, other, "__cmp__", "__rcmp__");
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if (result == NULL)
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return -2;
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outcome = getintvalue(result);
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DECREF(result);
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if (outcome == -1 && err_occurred())
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return -2;
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if (outcome < 0)
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return -1;
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else if (outcome > 0)
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return 1;
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return 0;
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}
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static long
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@ -680,47 +667,6 @@ static mapping_methods instance_as_mapping = {
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(objobjargproc)instance_ass_subscript, /*mp_ass_subscript*/
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};
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static object *
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instance_concat(inst, other)
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instanceobject *inst, *other;
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{
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object *func, *arg, *res;
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func = instance_getattr(inst, "__add__");
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if (func == NULL)
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return NULL;
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arg = mkvalue("(O)", other);
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if (arg == NULL) {
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DECREF(func);
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return NULL;
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}
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res = call_object(func, arg);
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DECREF(func);
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DECREF(arg);
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return res;
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}
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static object *
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instance_repeat(inst, count)
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instanceobject *inst;
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int count;
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{
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object *func, *arg, *res;
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func = instance_getattr(inst, "__mul__");
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if (func == NULL)
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return NULL;
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arg = newintobject((long)count);
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if (arg == NULL) {
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DECREF(func);
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return NULL;
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}
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res = call_object(func, arg);
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DECREF(func);
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DECREF(arg);
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return res;
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}
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static object *
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instance_item(inst, i)
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instanceobject *inst;
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@ -827,35 +773,14 @@ instance_ass_slice(inst, i, j, value)
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static sequence_methods instance_as_sequence = {
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(inquiry)instance_length, /*sq_length*/
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(binaryfunc)instance_concat, /*sq_concat*/
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(intargfunc)instance_repeat, /*sq_repeat*/
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0, /*sq_concat*/
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0, /*sq_repeat*/
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(intargfunc)instance_item, /*sq_item*/
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(intintargfunc)instance_slice, /*sq_slice*/
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(intobjargproc)instance_ass_item, /*sq_ass_item*/
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(intintobjargproc)instance_ass_slice, /*sq_ass_slice*/
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};
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static object *
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generic_binary_op(self, other, methodname)
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instanceobject *self;
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object *other;
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char *methodname;
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{
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object *func, *arg, *res;
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if ((func = instance_getattr(self, methodname)) == NULL)
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return NULL;
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arg = mkvalue("O", other);
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if (arg == NULL) {
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DECREF(func);
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return NULL;
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}
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res = call_object(func, arg);
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DECREF(func);
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DECREF(arg);
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return res;
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}
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static object *
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generic_unary_op(self, methodname)
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instanceobject *self;
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@ -870,23 +795,120 @@ generic_unary_op(self, methodname)
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return res;
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}
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#define BINARY(funcname, methodname) \
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static object * funcname(self, other) instanceobject *self; object *other; { \
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return generic_binary_op(self, other, methodname); \
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/* Forward */
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static int halfbinop PROTO((object *, object *, char *, object **));
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/* Implement a binary operator involving at least one class instance. */
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object *
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instancebinop(v, w, opname, ropname)
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object *v;
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object *w;
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char *opname;
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char *ropname;
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{
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char buf[256];
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object *result = NULL;
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if (halfbinop(v, w, opname, &result) <= 0)
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return result;
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if (halfbinop(w, v, ropname, &result) <= 0)
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return result;
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sprintf(buf, "%s nor %s defined for these operands", opname, ropname);
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err_setstr(TypeError, buf);
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return NULL;
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}
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/* Try one half of a binary operator involving a class instance.
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Return value:
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-1 if an exception is to be reported right away
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0 if we have a valid result
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1 if we could try another operation
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*/
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static int
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halfbinop(v, w, opname, r_result)
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object *v;
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object *w;
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char *opname;
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object **r_result;
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{
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object *func;
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object *args;
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object *coerce;
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object *coerced = NULL;
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object *v1;
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if (!is_instanceobject(v))
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return 1;
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func = getattr(v, opname);
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if (func == NULL) {
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if (err_occurred() != AttributeError)
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return -1;
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err_clear();
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return 1;
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}
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coerce = getattr(v, "__coerce__");
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if (coerce == NULL) {
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err_clear();
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}
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else {
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args = mkvalue("(O)", w);
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if (args == NULL) {
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DECREF(func);
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return -1;
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}
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coerced = call_object(coerce, args);
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DECREF(args);
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DECREF(coerce);
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if (coerced == NULL) {
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DECREF(func);
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return -1;
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}
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if (coerced == None) {
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DECREF(coerced);
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DECREF(func);
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return 1;
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}
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if (!is_tupleobject(coerced) || gettuplesize(coerced) != 2) {
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DECREF(coerced);
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DECREF(func);
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err_setstr(TypeError, "coercion should return None or 2-tuple");
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return -1;
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}
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v1 = gettupleitem(coerced, 0);
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if (v1 != v) {
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v = v1;
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DECREF(func);
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func = getattr(v, opname);
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if (func == NULL) {
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XDECREF(coerced);
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return -1;
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}
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}
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w = gettupleitem(coerced, 1);
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}
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args = mkvalue("(O)", w);
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if (args == NULL) {
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DECREF(func);
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XDECREF(coerced);
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return -1;
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}
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*r_result = call_object(func, args);
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DECREF(args);
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DECREF(func);
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XDECREF(coerced);
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return *r_result == NULL ? -1 : 0;
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}
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#define UNARY(funcname, methodname) \
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static object *funcname(self) instanceobject *self; { \
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return generic_unary_op(self, methodname); \
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}
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BINARY(instance_add, "__add__")
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BINARY(instance_sub, "__sub__")
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BINARY(instance_mul, "__mul__")
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BINARY(instance_div, "__div__")
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BINARY(instance_mod, "__mod__")
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BINARY(instance_divmod, "__divmod__")
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BINARY(instance_pow, "__pow__")
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UNARY(instance_neg, "__neg__")
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UNARY(instance_pos, "__pos__")
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UNARY(instance_abs, "__abs__")
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@ -926,76 +948,56 @@ instance_nonzero(self)
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}
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UNARY(instance_invert, "__invert__")
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BINARY(instance_lshift, "__lshift__")
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BINARY(instance_rshift, "__rshift__")
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BINARY(instance_and, "__and__")
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BINARY(instance_xor, "__xor__")
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BINARY(instance_or, "__or__")
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static int
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instance_coerce(pv, pw)
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object **pv, **pw;
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{
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object *v = *pv;
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object *w = *pw;
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object *func;
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object *res;
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int outcome;
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if (!is_instanceobject(v))
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return 1; /* XXX shouldn't be possible */
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func = instance_getattr((instanceobject *)v, "__coerce__");
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if (func == NULL) {
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err_clear();
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return 1;
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}
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res = call_object(func, w);
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if (res == NULL)
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return -1;
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if (res == None) {
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DECREF(res);
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return 1;
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}
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outcome = getargs(res, "(OO)", &v, &w);
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if (!outcome || v->ob_type != w->ob_type ||
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v->ob_type->tp_as_number == NULL) {
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DECREF(res);
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err_setstr(TypeError, "bad __coerce__ result");
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return -1;
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}
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INCREF(v);
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INCREF(w);
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DECREF(res);
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*pv = v;
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*pw = w;
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return 0;
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}
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UNARY(instance_int, "__int__")
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UNARY(instance_long, "__long__")
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UNARY(instance_float, "__float__")
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UNARY(instance_oct, "__oct__")
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UNARY(instance_hex, "__hex__")
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/* This version is for ternary calls only (z != None) */
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static object *
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instance_pow(v, w, z)
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object *v;
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object *w;
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object *z;
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{
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/* XXX Doesn't do coercions... */
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object *func;
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object *args;
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object *result;
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func = getattr(v, "__pow__");
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if (func == NULL)
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return NULL;
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args = mkvalue("(OO)", w, z);
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if (args == NULL) {
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DECREF(func);
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return NULL;
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}
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result = call_object(func, args);
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DECREF(func);
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DECREF(args);
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return result;
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}
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static number_methods instance_as_number = {
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(binaryfunc)instance_add, /*nb_add*/
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(binaryfunc)instance_sub, /*nb_subtract*/
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(binaryfunc)instance_mul, /*nb_multiply*/
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(binaryfunc)instance_div, /*nb_divide*/
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(binaryfunc)instance_mod, /*nb_remainder*/
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(binaryfunc)instance_divmod, /*nb_divmod*/
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0, /*nb_add*/
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0, /*nb_subtract*/
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0, /*nb_multiply*/
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0, /*nb_divide*/
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0, /*nb_remainder*/
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0, /*nb_divmod*/
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(ternaryfunc)instance_pow, /*nb_power*/
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(unaryfunc)instance_neg, /*nb_negative*/
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(unaryfunc)instance_pos, /*nb_positive*/
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(unaryfunc)instance_abs, /*nb_absolute*/
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(inquiry)instance_nonzero, /*nb_nonzero*/
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(unaryfunc)instance_invert, /*nb_invert*/
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(binaryfunc)instance_lshift, /*nb_lshift*/
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(binaryfunc)instance_rshift, /*nb_rshift*/
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(binaryfunc)instance_and, /*nb_and*/
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(binaryfunc)instance_xor, /*nb_xor*/
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(binaryfunc)instance_or, /*nb_or*/
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(coercion)instance_coerce, /*nb_coerce*/
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0, /*nb_lshift*/
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0, /*nb_rshift*/
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0, /*nb_and*/
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0, /*nb_xor*/
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0, /*nb_or*/
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0, /*nb_coerce*/
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(unaryfunc)instance_int, /*nb_int*/
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(unaryfunc)instance_long, /*nb_long*/
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(unaryfunc)instance_float, /*nb_float*/
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@ -1011,10 +1013,9 @@ typeobject Instancetype = {
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0,
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(destructor)instance_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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(object * (*) FPROTO((object *, char *)))
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(getattrfunc)instance_getattr, /*tp_getattr*/
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(setattrfunc)instance_setattr, /*tp_setattr*/
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(cmpfunc)instance_compare, /*tp_compare*/
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instance_compare, /*tp_compare*/
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(reprfunc)instance_repr, /*tp_repr*/
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&instance_as_number, /*tp_as_number*/
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&instance_as_sequence, /*tp_as_sequence*/
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@ -47,6 +47,18 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#define CHECK(x) /* Don't know how to check */
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifndef LONG_MAX
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#define LONG_MAX 0X7FFFFFFFL
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#endif
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#ifndef LONG_MIN
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#define LONG_MIN (-LONG_MAX-1)
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#endif
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#ifndef macintosh
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extern double fmod PROTO((double, double));
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extern double pow PROTO((double, double));
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@ -397,8 +409,11 @@ float_int(v)
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object *v;
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{
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double x = getfloatvalue(v);
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/* XXX should check for overflow */
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/* XXX should define how we round */
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if (x < 0 ? (x = ceil(x)) < (double)LONG_MIN
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: (x = floor(x)) > (double)LONG_MAX) {
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err_setstr(OverflowError, "float to large to convert");
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return NULL;
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}
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return newintobject((long)x);
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}
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|
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@ -159,7 +159,7 @@ getlongvalue(vv)
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prev = x;
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x = (x << SHIFT) + v->ob_digit[i];
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if ((x >> SHIFT) != prev) {
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err_setstr(ValueError,
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err_setstr(OverflowError,
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"long int too long to convert");
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return -1;
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}
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|
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|
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@ -1,6 +1,6 @@
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/***********************************************************
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Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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|
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All Rights Reserved
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|
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@ -105,7 +105,7 @@ range_repr(r)
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rangeobject *r;
|
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{
|
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char buf[80];
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sprintf(buf, "(range(%ld, %ld, %ld) * %d)",
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sprintf(buf, "(xrange(%ld, %ld, %ld) * %d)",
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r->start,
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r->start + r->len * r->step,
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r->step,
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|
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@ -222,7 +222,7 @@ range_getattr(r, name)
|
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char *name;
|
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{
|
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static struct methodlist range_methods[] = {
|
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{"tolist", range_tolist},
|
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{"tolist", (method)range_tolist},
|
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{NULL, NULL}
|
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};
|
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|
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|
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@ -230,11 +230,11 @@ range_getattr(r, name)
|
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}
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|
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static sequence_methods range_as_sequence = {
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range_length, /*sq_length*/
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range_concat, /*sq_concat*/
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range_repeat, /*sq_repeat*/
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range_item, /*sq_item*/
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range_slice, /*sq_slice*/
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(inquiry)range_length, /*sq_length*/
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(binaryfunc)range_concat, /*sq_concat*/
|
||||
(intargfunc)range_repeat, /*sq_repeat*/
|
||||
(intargfunc)range_item, /*sq_item*/
|
||||
(intintargfunc)range_slice, /*sq_slice*/
|
||||
0, /*sq_ass_item*/
|
||||
0, /*sq_ass_slice*/
|
||||
};
|
||||
|
|
@ -245,12 +245,12 @@ typeobject Rangetype = {
|
|||
"xrange", /* Name of this type */
|
||||
sizeof(rangeobject), /* Basic object size */
|
||||
0, /* Item size for varobject */
|
||||
range_dealloc, /*tp_dealloc*/
|
||||
range_print, /*tp_print*/
|
||||
range_getattr, /*tp_getattr*/
|
||||
(destructor)range_dealloc, /*tp_dealloc*/
|
||||
(printfunc)range_print, /*tp_print*/
|
||||
(getattrfunc)range_getattr, /*tp_getattr*/
|
||||
0, /*tp_setattr*/
|
||||
range_compare, /*tp_compare*/
|
||||
range_repr, /*tp_repr*/
|
||||
(cmpfunc)range_compare, /*tp_compare*/
|
||||
(reprfunc)range_repr, /*tp_repr*/
|
||||
0, /*tp_as_number*/
|
||||
&range_as_sequence, /*tp_as_sequence*/
|
||||
0, /*tp_as_mapping*/
|
||||
|
|
|
|||
|
|
@ -32,7 +32,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|||
int null_strings, one_strings;
|
||||
#endif
|
||||
|
||||
#ifdef __STDC__
|
||||
#ifdef HAVE_LIMITS_H
|
||||
#include <limits.h>
|
||||
#else
|
||||
#ifndef UCHAR_MAX
|
||||
|
|
|
|||
|
|
@ -34,24 +34,23 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|||
|
||||
/* Xx objects */
|
||||
|
||||
#include "allobjects.h"
|
||||
#include "modsupport.h" /* For getargs() etc. */
|
||||
#include "Python.h"
|
||||
|
||||
typedef struct {
|
||||
OB_HEAD
|
||||
object *x_attr; /* Attributes dictionary */
|
||||
PyObject_HEAD
|
||||
PyObject *x_attr; /* Attributes dictionary */
|
||||
} xxobject;
|
||||
|
||||
staticforward typeobject Xxtype;
|
||||
staticforward PyTypeObject Xxtype;
|
||||
|
||||
#define is_xxobject(v) ((v)->ob_type == &Xxtype)
|
||||
|
||||
static xxobject *
|
||||
newxxobject(arg)
|
||||
object *arg;
|
||||
PyObject *arg;
|
||||
{
|
||||
xxobject *xp;
|
||||
xp = NEWOBJ(xxobject, &Xxtype);
|
||||
xp = PyObject_NEW(xxobject, &Xxtype);
|
||||
if (xp == NULL)
|
||||
return NULL;
|
||||
xp->x_attr = NULL;
|
||||
|
|
@ -64,65 +63,65 @@ static void
|
|||
xx_dealloc(xp)
|
||||
xxobject *xp;
|
||||
{
|
||||
XDECREF(xp->x_attr);
|
||||
DEL(xp);
|
||||
Py_XDECREF(xp->x_attr);
|
||||
PyMem_DEL(xp);
|
||||
}
|
||||
|
||||
static object *
|
||||
static PyObject *
|
||||
xx_demo(self, args)
|
||||
xxobject *self;
|
||||
object *args;
|
||||
PyObject *args;
|
||||
{
|
||||
if (!getnoarg(args))
|
||||
if (!PyArg_NoArgs(args))
|
||||
return NULL;
|
||||
INCREF(None);
|
||||
return None;
|
||||
Py_INCREF(Py_None);
|
||||
return Py_None;
|
||||
}
|
||||
|
||||
static struct methodlist xx_methods[] = {
|
||||
{"demo", (method)xx_demo},
|
||||
static Py_MethodDef xx_methods[] = {
|
||||
{"demo", (PyCFunction)xx_demo},
|
||||
{NULL, NULL} /* sentinel */
|
||||
};
|
||||
|
||||
static object *
|
||||
static PyObject *
|
||||
xx_getattr(xp, name)
|
||||
xxobject *xp;
|
||||
char *name;
|
||||
{
|
||||
if (xp->x_attr != NULL) {
|
||||
object *v = dictlookup(xp->x_attr, name);
|
||||
PyObject *v = PyDict_GetItemString(xp->x_attr, name);
|
||||
if (v != NULL) {
|
||||
INCREF(v);
|
||||
Py_INCREF(v);
|
||||
return v;
|
||||
}
|
||||
}
|
||||
return findmethod(xx_methods, (object *)xp, name);
|
||||
return Py_FindMethod(xx_methods, (PyObject *)xp, name);
|
||||
}
|
||||
|
||||
static int
|
||||
xx_setattr(xp, name, v)
|
||||
xxobject *xp;
|
||||
char *name;
|
||||
object *v;
|
||||
PyObject *v;
|
||||
{
|
||||
if (xp->x_attr == NULL) {
|
||||
xp->x_attr = newdictobject();
|
||||
xp->x_attr = PyDict_New();
|
||||
if (xp->x_attr == NULL)
|
||||
return -1;
|
||||
}
|
||||
if (v == NULL) {
|
||||
int rv = dictremove(xp->x_attr, name);
|
||||
int rv = PyDict_DelItemString(xp->x_attr, name);
|
||||
if (rv < 0)
|
||||
err_setstr(AttributeError,
|
||||
PyErr_SetString(PyExc_AttributeError,
|
||||
"delete non-existing xx attribute");
|
||||
return rv;
|
||||
}
|
||||
else
|
||||
return dictinsert(xp->x_attr, name, v);
|
||||
return PyDict_SetItemString(xp->x_attr, name, v);
|
||||
}
|
||||
|
||||
static typeobject Xxtype = {
|
||||
OB_HEAD_INIT(&Typetype)
|
||||
static PyTypeObject Xxtype = {
|
||||
PyObject_HEAD_INIT(&PyType_Type)
|
||||
0, /*ob_size*/
|
||||
"xx", /*tp_name*/
|
||||
sizeof(xxobject), /*tp_basicsize*/
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue