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alee-forth/corewords.hpp

91 lines
2.8 KiB
C++

/**
* Alee Forth: A portable and concise Forth implementation in modern C++.
* Copyright (C) 2023 Clyne Sullivan <clyne@bitgloo.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef ALEEFORTH_COREWORDS_HPP
#define ALEEFORTH_COREWORDS_HPP
#include "types.hpp"
#include "state.hpp"
int user_sys(State&);
class CoreWords
{
public:
constexpr static std::size_t VisibleWordCount = 31; // size
constexpr static auto HiddenWordLiteral = VisibleWordCount; // index
constexpr static auto HiddenWordJump = VisibleWordCount + 1; // index
constexpr static auto WordCount = HiddenWordJump + 1; // size
constexpr static Cell Immediate = (1 << 5);
constexpr static Cell CoreImmediate = (1 << 6);
static int findi(std::string_view);
static Func find(std::string_view);
static void run(int, State&);
private:
constexpr static char wordsarr[] =
"drop\0dup\0swap\0pick\0sys\0"
"+\0-\0*\0/\0%\0"
"@\0!\0rot\0>r\0r>\0"
"=\0<\0allot\0&\0|\0"
"^\0<<\0>>\0(\0:\0"
";\1here\0imm\0const\0"
"if\1then\1";
static Func get(int);
static int op_drop(State&);
static int op_dup(State&);
static int op_swap(State&);
static int op_pick(State&);
static int op_sys(State&);
static int op_add(State&);
static int op_sub(State&);
static int op_mul(State&);
static int op_div(State&);
static int op_mod(State&);
static int op_peek(State&);
static int op_poke(State&);
static int op_rot(State&);
static int op_pushr(State&);
static int op_popr(State&);
static int op_eq(State&);
static int op_lt(State&);
static int op_allot(State&);
static int op_and(State&);
static int op_or(State&);
static int op_xor(State&);
static int op_shl(State&);
static int op_shr(State&);
static int op_comment(State&);
static int op_colon(State&);
static int op_semic(State&);
static int op_here(State&);
static int op_imm(State&);
static int op_const(State&);
static int op_literal(State&);
static int op_jump(State&);
static int op_if(State&);
static int op_then(State&);
};
#endif // ALEEFORTH_COREWORDS_HPP