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diff --git a/frontends/aiger/aigerparse.h b/frontends/aiger/aigerparse.h
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+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *                      Eddie Hung <eddie@fpgeh.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef ABC_AIGERPARSE
+#define ABC_AIGERPARSE
+
+#include "kernel/yosys.h"
+
+YOSYS_NAMESPACE_BEGIN
+
+struct AigerReader
+{
+    RTLIL::Design *design;
+    std::istream &f;
+    RTLIL::IdString clk_name;
+    RTLIL::Module *module;
+
+    unsigned M, I, L, O, A;
+    unsigned B, C, J, F; // Optional in AIGER 1.9
+    unsigned line_count;
+
+    std::vector<RTLIL::Wire*> inputs;
+    std::vector<RTLIL::Wire*> latches;
+    std::vector<RTLIL::Wire*> outputs;
+
+    AigerReader(RTLIL::Design *design, std::istream &f, RTLIL::IdString module_name, RTLIL::IdString clk_name);
+    void parse_aiger();
+    void parse_aiger_ascii();
+    void parse_aiger_binary();
+};
+
+YOSYS_NAMESPACE_END
+
+#endif