summaryrefslogtreecommitdiffstats
path: root/src/output.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/output.cpp')
-rw-r--r--src/output.cpp167
1 files changed, 27 insertions, 140 deletions
diff --git a/src/output.cpp b/src/output.cpp
index f9ffc1f..7f6e5c8 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -33,11 +33,10 @@
namespace solar {
-output_t::output_t(const generator_lr0_t *generator0, const char *header, const char *source)
+output_t::output_t(const char *header, const char *source)
: prefix_str("parse_"),
token_prefix_str("TOK_"),
stack_size(100),
- generator(generator0),
header_filename(header) {
header_file = std::fopen(header, "w");
if (!header_file)
@@ -46,23 +45,25 @@ output_t::output_t(const generator_lr0_t *generator0, const char *header, const
source_file = std::fopen(source, "w");
if (!source_file)
throw std::system_error(errno, std::generic_category(), "unable to open source output file for writing");
+}
- for (const std::string &nonterm : generator->get_nonterminals())
+output_t::~output_t() {
+ std::fclose(header_file);
+ std::fclose(source_file);
+}
+
+void output_t::initialize() {
+ for (const std::string &nonterm : get_generator()->get_nonterminals())
symbol_values.insert(std::make_pair(symbol_t::make_nonterm(nonterm.c_str()), "symbol_" + nonterm));
- for (const symbol_t &term : generator->get_terminals()) {
+ for (const symbol_t &term : get_generator()->get_terminals()) {
if (term.get_type() == SYMBOL_TYPE_TERM)
tokens.insert(std::make_pair(term.get_value(), tokens.size()));
- symbol_values.insert(std::make_pair(term, "token." + generator->get_grammar().get_term_type(term).second));
+ symbol_values.insert(std::make_pair(term, "token." + get_generator()->get_grammar().get_term_type(term).second));
}
}
-output_t::~output_t() {
- std::fclose(header_file);
- std::fclose(source_file);
-}
-
void output_t::emit_tokens() {
if (tokens.empty())
return;
@@ -80,8 +81,8 @@ void output_t::emit_token_value() {
std::map<std::string, std::string> token_values;
- for (const symbol_t &term : generator->get_terminals()) {
- const auto &type = generator->get_grammar().get_term_type(term);
+ for (const symbol_t &term : get_generator()->get_terminals()) {
+ const auto &type = get_generator()->get_grammar().get_term_type(term);
if (!type.first.empty())
token_values.insert(std::make_pair(type.second, type.first));
}
@@ -95,8 +96,8 @@ void output_t::emit_token_value() {
void output_t::emit_header() {
std::fprintf(header_file, "#pragma once\n\n");
- if (!generator->get_grammar().header_block.empty())
- std::fprintf(header_file, "%s\n", generator->get_grammar().header_block.c_str());
+ if (!get_generator()->get_grammar().header_block.empty())
+ std::fprintf(header_file, "%s\n", get_generator()->get_grammar().header_block.c_str());
emit_tokens();
emit_token_value();
@@ -108,19 +109,19 @@ void output_t::emit_header() {
std::fprintf(header_file, "int %spush(%scontext_t *parser, int token, const %stoken_value_t *value", prefix(), prefix(), prefix());
- for (const auto &arg : generator->get_grammar().extra_args)
+ for (const auto &arg : get_generator()->get_grammar().extra_args)
std::fprintf(header_file, ", %s %s", arg.first.c_str(), arg.second.c_str());
std::fprintf(header_file, ");\n");
}
void output_t::emit_reduction(unsigned rule_id) {
- const rule_t &rule = generator->get_grammar().rules[rule_id];
+ const rule_t &rule = get_generator()->get_grammar().rules[rule_id];
std::fprintf(source_file, "static inline ");
const item_t &item = rule.item;
- const std::string &type = generator->get_grammar().get_nonterm_type(item.get_lhs());
+ const std::string &type = get_generator()->get_grammar().get_nonterm_type(item.get_lhs());
if (type.empty())
std::fprintf(source_file, "void");
else
@@ -138,12 +139,12 @@ void output_t::emit_reduction(unsigned rule_id) {
if (!empty)
std::fprintf(source_file, ", ");
- std::fprintf(source_file, "%s %s", generator->get_grammar().get_type(item.get_rhs()[i]).c_str(), var.c_str());
+ std::fprintf(source_file, "%s %s", get_generator()->get_grammar().get_type(item.get_rhs()[i]).c_str(), var.c_str());
empty = false;
}
- for (const auto &arg : generator->get_grammar().extra_args) {
+ for (const auto &arg : get_generator()->get_grammar().extra_args) {
if (!empty)
std::fprintf(source_file, ", ");
@@ -162,7 +163,7 @@ void output_t::emit_reduction(unsigned rule_id) {
}
void output_t::emit_reductions() {
- const auto &rules = generator->get_grammar().rules;
+ const auto &rules = get_generator()->get_grammar().rules;
for (size_t i = 0; i < rules.size(); i++) {
if (!rules[i].action.empty())
@@ -170,122 +171,8 @@ void output_t::emit_reductions() {
}
}
-void output_t::emit_state_shift(unsigned 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");
- }
-
- for (const auto &token : generator->get_terminals()) {
- auto it = generator->get_shifts().find(std::make_pair(i, token));
- if (it == generator->get_shifts().end())
- continue;
-
- if (token.get_type() == SYMBOL_TYPE_CHAR)
- std::fprintf(source_file, "\t\t\tcase '%c':\n", token.get_value()[0]);
- else
- std::fprintf(source_file, "\t\t\tcase %s%s:\n", token_prefix(), token.get_value().c_str());
-
- 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");
- }
-
- 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");
-}
-
-void output_t::emit_state_reduce(const item_t &item, int rule_id) {
- const auto &rhs = item.get_rhs();
- if (rhs.size())
- std::fprintf(source_file, "\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");
- 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\tparser->stack[++parser->top].state = %u;\n", gotos[0].second);
- }
- else {
- std::fprintf(source_file, "\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\tcase %u:\n", unsigned(i));
- std::fprintf(source_file, "\t\t\t\tparser->stack[++parser->top].state = %u;\n", unsigned(it->second));
- std::fprintf(source_file, "\t\t\t\tbreak;\n");
- }
-
-
- std::fprintf(source_file, "\t\t\t}\n");
- }
-}
-
-void output_t::emit_state(unsigned i) {
- std::fprintf(source_file, "\t\tcase %u:\n", i);
-
- auto it = generator->get_reductions().find(i);
- if (it == generator->get_reductions().end()) {
- emit_state_shift(i);
- }
- else {
- const rule_t &rule = generator->get_grammar().rules[it->second];
- emit_state_reduce(rule.item, rule.action.empty() ? -1 : it->second);
- }
-
- std::fprintf(source_file, "\t\t\tbreak;\n\n");
-}
-
void output_t::emit_states() {
- for (size_t i = 0; i < generator->get_state_count(); i++)
+ for (size_t i = 0; i < get_generator()->get_state_count(); i++)
emit_state(i);
}
@@ -305,14 +192,14 @@ void output_t::emit_header_include() {
void output_t::emit_source() {
emit_header_include();
- if (!generator->get_grammar().source_block.empty())
- std::fprintf(source_file, "%s\n\n", generator->get_grammar().source_block.c_str());
+ if (!get_generator()->get_grammar().source_block.empty())
+ std::fprintf(source_file, "%s\n\n", get_generator()->get_grammar().source_block.c_str());
std::fprintf(source_file, "typedef union %ssymbol_value {\n", prefix());
std::fprintf(source_file, "\t%stoken_value_t token;\n", prefix());
- for (const auto &nonterm : generator->get_nonterminals()) {
- const std::string &type = generator->get_grammar().get_nonterm_type(nonterm);
+ for (const auto &nonterm : get_generator()->get_nonterminals()) {
+ const std::string &type = get_generator()->get_grammar().get_nonterm_type(nonterm);
if (!type.empty())
std::fprintf(source_file, "\t%s symbol_%s;\n", type.c_str(), nonterm.c_str());
@@ -344,7 +231,7 @@ void output_t::emit_source() {
emit_reductions();
std::fprintf(source_file, "int %spush(%scontext_t *parser, int token, const %stoken_value_t *value", prefix(), prefix(), prefix());
- for (const auto &arg : generator->get_grammar().extra_args)
+ for (const auto &arg : get_generator()->get_grammar().extra_args)
std::fprintf(source_file, ", %s %s", arg.first.c_str(), arg.second.c_str());
std::fprintf(source_file, ") {\n");
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 22:29:51 +0200