Provisional commit for issue #14. Implemented function for detecting reset. #19
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issue14のために、主要な三つ関数と二つ細かい関数を足しました。
現在は暫定的な状態で、結果自体は最終出力に反映されません。260行目-262行目のコメントアウトをはずしてtest_reset.pyを実行すると各関数の結果を確認できます。
_has_ifbranch:if分岐が存在するか?
_first_lvalue_is_const:最初のif文のtrue分岐において、variableを含まない数字が右辺にあるか?
_get_rst_info:最初のif文の条件文が単純である時、rst情報を取得する。条件文にポインタ以外の演算が含まれる場合はNoneを返す(RSTがないものとして扱う)
将来のコミットで前者二つがTrueであり、_get_rst_infoがNoneでないとき、RSTを取得できるようにするつもりです。