Python/bltinmodule.c: mods by Andrew Kuchling to implement
pow(x,y,z) == pow(x,y)%z, but without incurring overflow
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index d8e0d26..7e872ad 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -859,19 +859,32 @@
object *self;
object *args;
{
- object *v, *w, *x;
- if (!getargs(args, "(OO)", &v, &w))
- return NULL;
+ object *v, *w, *z, *x;
+ z = None;
+ if (!getargs(args, "(OO)", &v, &w)) {
+ err_clear();
+ if (!getargs(args, "(OOO)", &v, &w, &z)) {
+ return NULL;
+ }
+ }
if (v->ob_type->tp_as_number == NULL ||
- w->ob_type->tp_as_number == NULL) {
+ (z!=None && z->ob_type->tp_as_number == NULL) ||
+ w->ob_type->tp_as_number == NULL) {
err_setstr(TypeError, "pow() requires numeric arguments");
return NULL;
}
if (coerce(&v, &w) != 0)
return NULL;
- x = (*v->ob_type->tp_as_number->nb_power)(v, w);
+ if (z!=None) {
+ if (coerce(&w, &z) != 0)
+ return NULL;
+ if (coerce(&v, &z) != 0)
+ return NULL;
+ }
+ x = (*v->ob_type->tp_as_number->nb_power)(v, w, z);
DECREF(v);
DECREF(w);
+ if (z!=None) {DECREF(w); DECREF(v); DECREF(z); DECREF(z);}
return x;
}