  We present a model-independent analysis of CP violation, inspired by recent
experimental observations, in charmed meson decays. The topological diagram
approach is used to study direct CP asymmetries for singly Cabibbo-suppressed
two-body hadronic decays of charmed mesons. We extract the magnitudes and
relative phases of the corresponding topological amplitudes from available
experimental information. In order to get more precise and reliable estimates
of direct CP asymmetries, we take into account contributions from all possible
strong penguin amplitudes, including the internal $b$-quark penguin
contributions. We also study flavor SU(3) symmetry breaking effects in these
decay modes and consequently, predict direct CP asymmetries of unmeasured
modes.
