//	x-amz-copy-source-if-match
//	x-amz-copy-source-if-none-match
func checkCopyObjectPartPreconditions(ctx context.Context, w http.ResponseWriter, r *http.Request, objInfo ObjectInfo) bool {
	return checkCopyObjectPreconditions(ctx, w, r, objInfo)
}

// Validates the preconditions for CopyObject, returns true if CopyObject operation should not proceed.
// Preconditions supported are:
//
//	x-amz-copy-source-if-modified-since

	checkCopyPrecondFn := func(o ObjectInfo) bool {
		if _, err := DecryptObjectInfo(&o, r); err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return true
		}
		return checkCopyObjectPreconditions(ctx, w, r, o)
	}
	getOpts.CheckPrecondFn = checkCopyPrecondFn
	if cpSrcDstSame {
		getOpts.NoLock = true
	}

	var rs *HTTPRangeSpec