103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
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/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _PIO_ASSEMBLER_H
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#define _PIO_ASSEMBLER_H
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#include <algorithm>
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#include "parser.hpp"
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#include "output_format.h"
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// Give Flex the prototype of yylex we want ...
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# define YY_DECL \
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yy::parser::symbol_type yylex (pio_assembler& pioasm)
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// ... and declare it for the parser's sake.
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YY_DECL;
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struct pio_assembler {
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public:
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using syntax_error = yy::parser::syntax_error;
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using location_type = yy::parser::location_type;
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std::shared_ptr<program> dummy_global_program;
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std::vector<program> programs;
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int error_count = 0;
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pio_assembler();
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std::shared_ptr<output_format> format;
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// The name of the file being parsed.
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std::string source;
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// name of the output file or "-" for stdout
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std::string dest;
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std::vector<std::string> options;
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int write_output();
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bool add_program(const yy::location &l, const std::string &name) {
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if (std::find_if(programs.begin(), programs.end(), [&](const program &p) { return p.name == name; }) ==
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programs.end()) {
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programs.emplace_back(this, l, name);
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return true;
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} else {
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return false;
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}
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}
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program &get_dummy_global_program() {
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if (!dummy_global_program) {
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dummy_global_program = std::shared_ptr<program>(new program(this, yy::location(&source), ""));
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}
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return *dummy_global_program;
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}
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program &get_current_program(const location_type &l, const std::string &requiring_program,
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bool before_any_instructions = false, bool disallow_global = true) {
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if (programs.empty()) {
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if (disallow_global) {
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std::stringstream msg;
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msg << requiring_program << " is invalid outside of a program";
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throw syntax_error(l, msg.str());
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}
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return get_dummy_global_program();
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}
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auto &p = programs[programs.size() - 1];
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if (before_any_instructions && !p.instructions.empty()) {
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std::stringstream msg;
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msg << requiring_program << " must preceed any program instructions";
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throw syntax_error(l, msg.str());
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}
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return p;
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}
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// note p may be null for global symbols only
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std::shared_ptr<symbol> get_symbol(const std::string &name, const program *p) {
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const auto &i = get_dummy_global_program().symbols.find(name);
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if (i != get_dummy_global_program().symbols.end())
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return i->second;
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if (p) {
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const auto &i2 = p->symbols.find(name);
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if (i2 != p->symbols.end())
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return i2->second;
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}
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return nullptr;
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}
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std::vector<compiled_source::symbol> public_symbols(program &program);
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int generate(std::shared_ptr<output_format> _format, const std::string &_source, const std::string &_dest,
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const std::vector<std::string> &_options = std::vector<std::string>());
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// Handling the scanner.
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void scan_begin();
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void scan_end();
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// The token's location used by the scanner.
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yy::location location;
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};
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#endif
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