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89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
2 years ago
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/**
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* Alee Forth: A portable and concise Forth implementation in modern C++.
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* Copyright (C) 2023 Clyne Sullivan <clyne@bitgloo.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef ALEEFORTH_COREWORDS_HPP
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#define ALEEFORTH_COREWORDS_HPP
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#include "types.hpp"
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#include "state.hpp"
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int user_sys(State&);
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class CoreWords
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{
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public:
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constexpr static std::size_t VisibleWordCount = 30; // size
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constexpr static std::size_t HiddenWordLiteral = 30; // index
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constexpr static std::size_t HiddenWordJump = 31; // index
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constexpr static std::size_t WordCount = 32; // size
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constexpr static Cell Immediate = (1 << 5);
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static int findi(std::string_view str);
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static Func find(std::string_view str);
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static void run(int i, State& state);
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private:
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constexpr static char wordsarr[] =
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"drop\0dup\0swap\0pick\0sys\0"
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"+\0-\0*\0/\0%\0"
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"@\0!\0rot\0>r\0r>\0"
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"=\0<\0allot\0&\0|\0"
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"^\0<<\0>>\0(\0:\0"
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";\0here\0exit\0imm\0const\0";
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// lit, jmp, jmp0, ', lits
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static Func get(int index);
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static int op_drop(State& state);
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static int op_dup(State& state);
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static int op_swap(State& state);
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static int op_pick(State& state);
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static int op_sys(State& state);
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static int op_add(State& state);
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static int op_sub(State& state);
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static int op_mul(State& state);
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static int op_div(State& state);
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static int op_mod(State& state);
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static int op_peek(State& state);
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static int op_poke(State& state);
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static int op_rot(State& state);
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static int op_pushr(State& state);
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static int op_popr(State& state);
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static int op_eq(State& state);
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static int op_lt(State& state);
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static int op_allot(State& state);
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static int op_and(State& state);
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static int op_or(State& state);
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static int op_xor(State& state);
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static int op_shl(State& state);
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static int op_shr(State& state);
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static int op_comment(State& state);
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static int op_colon(State& state);
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static int op_semic(State& state);
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static int op_here(State& state);
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static int op_exit(State& state);
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static int op_imm(State& state);
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static int op_const(State& state);
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static int op_literal(State& state);
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static int op_jump(State& state);
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};
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#endif // ALEEFORTH_COREWORDS_HPP
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