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-rw-r--r--src/CMakeLists.txt1
-rw-r--r--src/output_slr.cpp164
-rw-r--r--src/output_slr.hpp56
-rw-r--r--src/solar.cpp8
4 files changed, 225 insertions, 4 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 725d0f0..3f2be49 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,6 +5,7 @@ add_executable(solar
lex.cpp
output.cpp
output_lr0.cpp
+ output_slr.cpp
parser.cpp
parser_state.cpp
solar.cpp
diff --git a/src/output_slr.cpp b/src/output_slr.cpp
new file mode 100644
index 0000000..ad0d415
--- /dev/null
+++ b/src/output_slr.cpp
@@ -0,0 +1,164 @@
+/*
+ Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "output_slr.hpp"
+
+#include <cerrno>
+#include <cstring>
+#include <system_error>
+
+
+namespace solar {
+
+void output_slr_t::emit_state_shift(unsigned i, const symbol_t &token) {
+ auto it = generator->get_shifts().find(std::make_pair(i, token));
+ if (it == generator->get_shifts().end())
+ return;
+
+ if (token.get_type() == SYMBOL_TYPE_CHAR)
+ std::fprintf(source_file, "\t\t\tcase '%c':\n", token.get_value()[0]);
+ else if (!token.get_value().empty())
+ std::fprintf(source_file, "\t\t\tcase %s%s:\n", token_prefix(), token.get_value().c_str());
+ else
+ std::fprintf(source_file, "\t\t\tcase 0:\n");
+
+ std::fprintf(source_file, "\t\t\t\tparser->stack[parser->top].value.token = *value;\n");
+ std::fprintf(source_file, "\t\t\t\tparser->stack[++parser->top].state = %u;\n", unsigned(it->second));
+ std::fprintf(source_file, "\t\t\t\treturn 1;\n\n");
+}
+
+void output_slr_t::emit_state_reduce(const item_t &item, const symbol_t &token, int rule_id) {
+ if (token.get_type() == SYMBOL_TYPE_CHAR)
+ std::fprintf(source_file, "\t\t\tcase '%c':\n", token.get_value()[0]);
+ else if (!token.get_value().empty())
+ std::fprintf(source_file, "\t\t\tcase %s%s:\n", token_prefix(), token.get_value().c_str());
+ else
+ std::fprintf(source_file, "\t\t\tcase 0:\n");
+
+ const auto &rhs = item.get_rhs();
+ if (rhs.size())
+ std::fprintf(source_file, "\t\t\t\tparser->top -= %u;\n", unsigned(rhs.size()));
+
+ if (rule_id >= 0) {
+ const std::string &type = generator->get_grammar().get_nonterm_type(item.get_lhs());
+
+ std::fprintf(source_file, "\t\t\t\t");
+ if (!type.empty())
+ std::fprintf(source_file, "parser->stack[parser->top].value.symbol_%s = ", item.get_lhs().c_str());
+ std::fprintf(source_file, "%sreduce_%i(", prefix(), rule_id);
+
+ bool empty = true;
+ const auto &vars = generator->get_grammar().rules[rule_id].variables;
+ for (unsigned i = 0; i < vars.size(); i++) {
+ const std::string &var = vars[i];
+ if (var.empty())
+ continue;
+
+ if (!empty)
+ std::fprintf(source_file, ", ");
+
+ std::fprintf(source_file, "parser->stack[parser->top + %u].value.%s", i, symbol_values[rhs[i]].c_str());
+ empty = false;
+ }
+
+ for (const auto &arg : generator->get_grammar().extra_args) {
+ if (!empty)
+ std::fprintf(source_file, ", ");
+
+ std::fprintf(source_file, "%s", arg.second.c_str());
+
+ empty = false;
+ }
+
+ std::fprintf(source_file, ");\n");
+ }
+
+ std::vector<std::pair<unsigned, unsigned>> gotos;
+
+ for (size_t i = 0; i < generator->get_state_count(); i++) {
+ auto it = generator->get_gotos().find(std::make_pair(i, item.get_lhs()));
+ if (it == generator->get_gotos().end())
+ continue;
+
+ gotos.emplace_back(i, it->second);
+ }
+
+ if (gotos.size() == 1) {
+ std::fprintf(source_file, "\t\t\t\tparser->stack[++parser->top].state = %u;\n", gotos[0].second);
+ }
+ else {
+ std::fprintf(source_file, "\t\t\t\tswitch (parser->stack[parser->top].state) {\n");
+
+ for (size_t i = 0; i < generator->get_state_count(); i++) {
+ auto it = generator->get_gotos().find(std::make_pair(i, item.get_lhs()));
+ if (it == generator->get_gotos().end())
+ continue;
+
+ std::fprintf(source_file, "\t\t\t\tcase %u:\n", unsigned(i));
+ std::fprintf(source_file, "\t\t\t\t\tparser->stack[++parser->top].state = %u;\n", unsigned(it->second));
+ std::fprintf(source_file, "\t\t\t\t\tbreak;\n");
+ }
+
+
+ std::fprintf(source_file, "\t\t\t\t}\n");
+ }
+
+ std::fprintf(source_file, "\t\t\t\tbreak;\n\n");
+}
+
+void output_slr_t::do_emit_state(unsigned i, const symbol_t &token) {
+ auto it = generator->get_reductions().find(std::make_pair(i, token));
+ if (it == generator->get_reductions().end()) {
+ emit_state_shift(i, token);
+ }
+ else {
+ const rule_t &rule = generator->get_grammar().rules[it->second];
+ emit_state_reduce(rule.item, token, rule.action.empty() ? -1 : it->second);
+ }
+}
+
+void output_slr_t::emit_state(unsigned i) {
+ std::fprintf(source_file, "\t\tcase %u:\n", i);
+ std::fprintf(source_file, "\t\t\tswitch (token) {\n");
+
+ if (generator->get_shifts().find(std::make_pair(i, symbol_t::make_nonterm(""))) != generator->get_shifts().end()) {
+ std::fprintf(source_file, "\t\t\tcase 0:\n");
+ std::fprintf(source_file, "\t\t\t\treturn 0;\n\n");
+ }
+
+ do_emit_state(i, symbol_t::empty());
+
+ for (const symbol_t &token : generator->get_terminals())
+ do_emit_state(i, token);
+
+ std::fprintf(source_file, "\t\t\tdefault:\n");
+ std::fprintf(source_file, "\t\t\t\treturn -1;\n");
+
+ std::fprintf(source_file, "\t\t\t}\n");
+ std::fprintf(source_file, "\t\t\tbreak;\n\n");
+}
+
+}
diff --git a/src/output_slr.hpp b/src/output_slr.hpp
new file mode 100644
index 0000000..3c6690a
--- /dev/null
+++ b/src/output_slr.hpp
@@ -0,0 +1,56 @@
+/*
+ Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "generator_slr.hpp"
+#include "output.hpp"
+
+
+namespace solar {
+
+class output_slr_t : public output_t {
+private:
+ const generator_slr_t *generator;
+
+ void emit_state_shift(unsigned i, const symbol_t &token);
+ void emit_state_reduce(const item_t &item, const symbol_t &token, int rule_id);
+ void do_emit_state(unsigned i, const symbol_t &token);
+
+protected:
+ virtual const generator_t * get_generator() {
+ return generator;
+ }
+
+ virtual void emit_state(unsigned i);
+
+public:
+ output_slr_t(const generator_slr_t *generator0, const char *header, const char *source) : output_t(header, source), generator(generator0) {
+ initialize();
+ }
+};
+
+}
diff --git a/src/solar.cpp b/src/solar.cpp
index e6c0b0a..e7eb00b 100644
--- a/src/solar.cpp
+++ b/src/solar.cpp
@@ -26,8 +26,8 @@
#include "lex.hpp"
#include "parser.hpp"
-#include "generator_lr0.hpp"
-#include "output_lr0.hpp"
+#include "generator_slr.hpp"
+#include "output_slr.hpp"
#include <cstdio>
@@ -87,9 +87,9 @@ int main(int argc, char *argv[]) {
if (!read_grammar(argv[1], &state))
return 1;
- generator_lr0_t generator(state.get_grammar());
+ generator_slr_t generator(state.get_grammar());
- output_lr0_t output(&generator, argv[3], argv[2]);
+ output_slr_t output(&generator, argv[3], argv[2]);
output.write();
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 12:39:45 +0100