paleolimbot commented on code in PR #578:
URL: https://github.com/apache/arrow-nanoarrow/pull/578#discussion_r1710222949
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src/nanoarrow/common/array.c:
##########
@@ -1335,3 +1335,177 @@ ArrowErrorCode ArrowArrayViewValidate(struct
ArrowArrayView* array_view,
ArrowErrorSet(error, "validation_level not recognized");
return EINVAL;
}
+
+struct ArrowComparisonInternalState {
+ enum ArrowCompareLevel level;
+ int is_equal;
+ struct ArrowBuffer path;
+ struct ArrowError reason;
+};
+
+#define RETURN_NOT_EQUAL_IMPL(state_, path_size_, cond_, reason_) \
+ do { \
+ if (cond_) { \
+ ArrowErrorSet(&state_->reason, "%s", reason_); \
+ state_->path.size_bytes = (path_size_); \
+ state_->is_equal = 0; \
+ return NANOARROW_OK; \
+ } \
+ } while (0)
+
+#define RETURN_NOT_EQUAL(state_, path_size_, condition_) \
+ RETURN_NOT_EQUAL_IMPL(state_, path_size_, condition_, #condition_)
+
+static ArrowErrorCode ArrowArrayViewCompareStructure(
+ const struct ArrowArrayView* actual, const struct ArrowArrayView* expected,
+ struct ArrowComparisonInternalState* state) {
+ int64_t path_size = state->path.size_bytes;
+
+ RETURN_NOT_EQUAL(state, path_size, actual->storage_type !=
expected->storage_type);
+ RETURN_NOT_EQUAL(state, path_size, actual->n_children !=
expected->n_children);
+ RETURN_NOT_EQUAL(state, path_size,
+ actual->dictionary == NULL && expected->dictionary != NULL);
+ RETURN_NOT_EQUAL(state, path_size,
+ actual->dictionary != NULL && expected->dictionary == NULL);
+
Review Comment:
I was thinking that most of that might be the role of a schema comparison
that would probably preceede this check?
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