kicad/eeschema/sim/spice_grammar.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2022 Mikolaj Wielgus
* Copyright (C) 2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* https://www.gnu.org/licenses/gpl-3.0.html
* or you may search the http://www.gnu.org website for the version 3 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef SPICE_GRAMMAR_H
#define SPICE_GRAMMAR_H
#include <sim/sim_value.h>
namespace SPICE_GRAMMAR
{
using namespace SIM_VALUE_GRAMMAR;
struct garbage : plus<one<' ', '\t', '=', '(', ')', ','>> {};
struct leaders : plus<one<' ', '\t'>> {};
struct trailers : plus<one<' ', '\t', '\v', '\f'>> {};
struct garbageOrEolf : sor<garbage, eolf> {};
// NOTE: In Ngspice, a '$' opening a comment must be preceded by ' ', ',', or '\t'. We don't
// implement that here - this may cause problems in the future.
// Ngspice supports '//' for comments.
struct eolfCommentStart : sor<one<';', '$'>,
string<'/', '/'>> {};
struct eolfComment : seq<eolfCommentStart,
until<eolf>> {};
struct commentLine : seq<opt<garbage>,
one<'*'>,
until<eolf>> {};
struct newline : seq<sor<eolf,
eolfComment>,
not_at<one<'+'>>> {};
struct backslashContinuation : seq<string<'\\', '\\'>,
opt<trailers>,
eolf> {};
struct commentBackslashContinuation : seq<eolfCommentStart,
seq<star<not_at<eolf>,
not_at<string<'\\', '\\'>,
opt<trailers>,
eolf>,
any>,
string<'\\', '\\'>,
opt<trailers>,
eolf>> {};
struct plusContinuation : seq<sor<eolf,
eolfComment>,
star<commentLine>,
opt<leaders>,
one<'+'>> {};
struct continuation : seq<opt<garbage>,
sor<backslashContinuation,
commentBackslashContinuation,
plusContinuation>,
opt<garbage>> {};
// Token separator.
struct sep : sor<plus<continuation>,
garbage> {};
struct modelName : plus<not_at<garbageOrEolf>, any> {};
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struct dotModelType : sor<// VDMOS models have a special syntax.
seq<TAO_PEGTL_ISTRING( "vdmos" ),
sep,
sor<TAO_PEGTL_ISTRING( "nchan" ),
TAO_PEGTL_ISTRING( "pchan" )>>,
plus<alpha>> {};
struct numparamBracedExpr : seq<one<'{'>,
star<sor<numparamBracedExpr,
not_one<'}'>>>,
one<'}'>> {};
// Ngspice has some heuristic logic to allow + and - in tokens. We replicate that here.
struct tokenStart : seq<opt<one<'+', '-'>>,
opt<seq<star<sor<tao::pegtl::digit,
one<'.'>>>,
one<'e', 'E'>,
opt<one<'+', '-'>>>>> {};
struct token : seq<tokenStart,
star<not_at<eolf>,
not_at<backslashContinuation>,
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not_one<' ', '\t', '=', '(', ')', ',', '*', '/', '^', ';'>>>
{};
// Param names cannot be `token` because LTspice models contain spurious values without
// parameter names, which we need to skip.
struct param : identifier {};
struct paramValue : sor<numparamBracedExpr,
token> {};
struct paramValuePair : seq<param,
sep,
paramValue> {};
struct paramValuePairs : list<paramValuePair, sep> {};
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struct dotModelAko : seq<opt<sep>,
if_must<seq<TAO_PEGTL_ISTRING( ".model" ),
sep,
modelName,
sep,
TAO_PEGTL_ISTRING( "ako:" )>,
opt<sep>,
modelName,
opt<sep,
dotModelType>,
opt<sep,
paramValuePairs>,
opt<sep>,
newline>> {};
struct dotModel : seq<opt<sep>,
if_must<TAO_PEGTL_ISTRING( ".model" ),
sep,
modelName,
sep,
dotModelType,
opt<sep,
paramValuePairs>,
opt<sep>,
newline>> {};
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struct dotSubcktParamValuePair : seq<param,
// TODO: Check if these `star<space>`s match Ngspice's
// behavior.
star<space>,
one<'='>,
star<space>,
paramValue> {};
struct dotSubcktParamValuePairs : list<dotSubcktParamValuePair, sep> {};
struct dotSubcktParams : seq<opt<TAO_PEGTL_ISTRING( "params:" ),
opt<sep>>,
dotSubcktParamValuePairs> {};
struct dotSubcktPinName : seq<not_at<dotSubcktParams>,
plus<not_at<space>, any>> {};
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struct dotSubcktPinSequence : list<dotSubcktPinName, sep> {};
struct dotSubcktEnd : seq<TAO_PEGTL_ISTRING( ".ends" ),
until<newline>> {};
struct spiceUnit;
struct dotSubckt : seq<opt<sep>,
if_must<TAO_PEGTL_ISTRING( ".subckt" ),
sep,
modelName,
opt<sep,
dotSubcktPinSequence>,
opt<sep,
dotSubcktParams>,
opt<sep>,
newline,
until<dotSubcktEnd,
spiceUnit>>> {};
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struct modelUnit : sor<dotModelAko,
dotModel,
dotSubckt> {};
// Intentionally no if_must<>.
struct dotControl : seq<opt<sep>,
TAO_PEGTL_ISTRING( ".control" ),
until<TAO_PEGTL_ISTRING( ".endc" )>,
until<newline>> {};
struct dotTitleTitle : star<not_at<newline>, any> {};
// Intentionally no if_must<>.
struct dotTitle : seq<opt<sep>,
TAO_PEGTL_ISTRING( ".title" ),
sep,
dotTitleTitle,
newline> {};
struct dotIncludePathWithoutQuotes : star<not_one<'"'>> {};
struct dotIncludePathWithoutApostrophes : star<not_one<'\''>> {};
struct dotIncludePath : star<not_at<newline>, any> {};
// Intentionally no if_must<>.
struct dotInclude : seq<opt<sep>,
TAO_PEGTL_ISTRING( ".inc" ),
star<not_at<garbageOrEolf>, any>,
sep,
sor<seq<one<'\"'>,
dotIncludePathWithoutQuotes,
one<'\"'>>,
seq<one<'\''>,
dotIncludePathWithoutApostrophes,
one<'\''>>,
dotIncludePath>,
opt<sep>,
newline> {};
// Intentionally no if_must<>.
struct dotLine : seq<opt<sep>,
one<'.'>,
until<newline>> {};
// Intentionally no if_must<>.
struct kLine : seq<opt<sep>,
one<'K'>,
until<sep>,
one<'L'>,
until<sep>,
one<'L'>,
until<sep>,
until<newline>> {};
struct unknownLine : seq<plus<not_at<newline>, any>,
until<newline>> {};
struct spiceUnit : sor<modelUnit,
dotControl,
dotTitle,
dotInclude,
dotLine,
kLine,
eol, // Empty line. This is necessary to terminate on EOF.
unknownLine> {};
struct spiceUnitGrammar : must<spiceUnit> {};
struct spiceSource : star<spiceUnit> {};
struct spiceSourceNothrow : star<try_catch<spiceUnit>> {};
struct spiceSourceGrammar : must<spiceSource> {};
template <typename> inline constexpr const char* errorMessage = nullptr;
template <> inline constexpr auto errorMessage<newline> =
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"expected newline";
template <> inline constexpr auto errorMessage<sep> =
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"expected token separator (one or more whitespace, parenthesis, '=', ',', or line continuation)";
template <> inline constexpr auto errorMessage<opt<sep>> =
"";
template <> inline constexpr auto errorMessage<modelName> =
"expected model name";
template <> inline constexpr auto errorMessage<dotModelType> =
"expected model type";
template <> inline constexpr auto errorMessage<opt<sep, dotModelType>> =
"";
template <> inline constexpr auto errorMessage<opt<sep, paramValuePairs>> =
"";
template <> inline constexpr auto errorMessage<opt<sep, dotSubcktPinSequence>> =
"";
template <> inline constexpr auto errorMessage<opt<sep, dotSubcktParams>> =
"";
template <> inline constexpr auto errorMessage<until<dotSubcktEnd, spiceUnit>> =
"expected (possibly empty) sequence of Spice lines followed by an .ends line";
template <> inline constexpr auto errorMessage<spiceUnit> =
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"expected Spice directive, item, subcircuit definitions, or empty or commented-out line";
template <> inline constexpr auto errorMessage<spiceSource> =
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"expected zero or more Spice directives, items, subcircuit definitions, or empty or commented-out lines";
template <> inline constexpr auto errorMessage<spiceSourceNothrow> =
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"expected zero or more Spice directives, items, subcircuit definitions, or empty or commented-out lines";
// We create a custom PEGTL control to modify the parser error messages.
struct error
{
template <typename Rule> static constexpr bool raise_on_failure = false;
template <typename Rule> static constexpr auto message = errorMessage<Rule>;
};
template <typename Rule> using control = must_if<error>::control<Rule>;
}
#endif // SPICE_GRAMMAR_H