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https://github.com/YosysHQ/yosys
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044ca9dde4
This patch should support things like `define foo(a, b = 3, c) a+b+c `foo(1, ,2) which will evaluate to 1+3+2. It also spots mistakes like `foo(1) (the 3rd argument doesn't have a default value, so a call site is required to set it). Most of the patch is a simple parser for the format in preproc.cc, but I've also taken the opportunity to wrap up the "name -> definition" map in a type, rather than use multiple std::map's. Since this type needs to be visible to code that touches defines, I've pulled it (and the frontend_verilog_preproc declaration) out into a new file at frontends/verilog/preproc.h and included that where necessary. Finally, the patch adds a few tests in tests/various to check that we are parsing everything correctly.
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* ---
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*
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* The Verilog preprocessor.
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*
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*/
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#ifndef VERILOG_PREPROC_H
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#define VERILOG_PREPROC_H
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#include "kernel/yosys.h"
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#include <iosfwd>
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#include <list>
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#include <memory>
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#include <string>
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YOSYS_NAMESPACE_BEGIN
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struct define_body_t;
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struct arg_map_t;
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struct define_map_t
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{
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define_map_t();
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~ define_map_t();
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// Add a definition, overwriting any existing definition for name.
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void add(const std::string &name, const std::string &txt, const arg_map_t *args = nullptr);
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// Merge in another map of definitions (which take precedence
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// over anything currently defined).
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void merge(const define_map_t &map);
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// Find a definition by name. If no match, returns null.
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const define_body_t *find(const std::string &name) const;
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// Erase a definition by name (no effect if not defined).
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void erase(const std::string &name);
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// Clear any existing definitions
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void clear();
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// Print a list of definitions, using the log function
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void log() const;
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std::map<std::string, std::unique_ptr<define_body_t>> defines;
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};
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struct define_map_t;
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std::string
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frontend_verilog_preproc(std::istream &f,
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std::string filename,
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const define_map_t &pre_defines,
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define_map_t &global_defines_cache,
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const std::list<std::string> &include_dirs);
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YOSYS_NAMESPACE_END
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#endif
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