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* Python/bltinmodule.c: added tuple() builtin

This commit is contained in:
Guido van Rossum 1994-08-29 12:53:11 +00:00
parent df05ac6dfb
commit cae027b298
1 changed files with 71 additions and 0 deletions
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71
Python/bltinmodule.c
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@ -1151,6 +1151,76 @@ builtin_str(self, v)
return strobject(v);
}
static object *
builtin_tuple(self, v)
object *self;
object *v;
{
sequence_methods *sqf;
if (v == NULL)
v = None; /* Force error later */
if (is_tupleobject(v)) {
INCREF(v);
return v;
}
if (is_listobject(v)) {
int n = getlistsize(v);
object *t = newtupleobject(n);
if (t != NULL) {
int i;
for (i = 0; i < n; i++) {
object *item = getlistitem(v, i);
INCREF(item);
settupleitem(t, i, item);
}
}
return t;
}
if (is_stringobject(v)) {
int n = getstringsize(v);
object *t = newtupleobject(n);
if (t != NULL) {
int i;
char *p = getstringvalue(v);
for (i = 0; i < n; i++) {
object *item = newsizedstringobject(p+i, 1);
if (item == NULL) {
DECREF(t);
t = NULL;
break;
}
settupleitem(t, i, item);
}
}
return t;
}
/* Generic sequence object */
if ((sqf = v->ob_type->tp_as_sequence) != NULL) {
int n = (*sqf->sq_length)(v);
int i;
object *t;
if (n < 0)
return NULL;
t = newtupleobject(n);
if (t == NULL)
return NULL;
for (i = 0; i < n; i++) {
object *item = (*sqf->sq_item)(v, i);
if (item == NULL) {
DECREF(t);
t = NULL;
break;
}
settupleitem(t, i, item);
}
/* XXX Should support indefinite-length sequences */
return t;
}
/* None of the above */
err_setstr(TypeError, "tuple() argument must be a sequence");
return NULL;
}
static object *
builtin_type(self, v)
object *self;
@ -1224,6 +1294,7 @@ static struct methodlist builtin_methods[] = {
{"round", builtin_round},
{"setattr", builtin_setattr},
{"str", builtin_str},
{"tuple", builtin_tuple},
{"type", builtin_type},
{"vars", builtin_vars},
{"xrange", builtin_xrange},