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Enhance handling of circular references

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It's now an error to try to add an object or array to itself. The
encoder checks for circular references and fails with an error status
if one is detected.
This commit is contained in:
Petri Lehtinen
2009-10-15 21:02:27 +03:00
parent 79009e62c1
commit 4cd777712b
6 changed files with 182 additions and 42 deletions
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47
test/testprogs/test_array.c
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@@ -340,6 +340,52 @@ static void test_extend(void)
json_decref(array2);
}
static void test_circular()
{
json_t *array1, *array2;
/* the simple cases are checked */
array1 = json_array();
if(!array1)
fail("unable to create array");
if(json_array_append(array1, array1) == 0)
fail("able to append self");
if(json_array_insert(array1, 0, array1) == 0)
fail("able to insert self");
if(json_array_append_new(array1, json_true()))
fail("failed to append true");
if(json_array_set(array1, 0, array1) == 0)
fail("able to set self");
json_decref(array1);
/* create circular references */
array1 = json_array();
array2 = json_array();
if(!array1 || !array2)
fail("unable to create array");
if(json_array_append(array1, array2) ||
json_array_append(array2, array1))
fail("unable to append");
/* circularity is detected when dumping */
if(json_dumps(array1, 0) != NULL)
fail("able to dump circulars");
/* decref twice to deal with the circular references */
json_decref(array1);
json_decref(array2);
json_decref(array1);
}
int main()
{
@@ -348,6 +394,7 @@ int main()
test_remove();
test_clear();
test_extend();
test_circular();
return 0;
}