You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.8 KiB
C++
62 lines
1.8 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"
|
|
|
|
/**
|
|
* To be implemented by the user, this function is called when the `sys` word
|
|
* is executed.
|
|
*/
|
|
void user_sys(State&);
|
|
|
|
class CoreWords
|
|
{
|
|
public:
|
|
constexpr static std::size_t WordCount = 35;
|
|
constexpr static int Semicolon = 26;
|
|
|
|
/**
|
|
* Finds execution token that corresponds to the given word.
|
|
* Returns -1 if not found.
|
|
*/
|
|
static int findi(const char *);
|
|
static int findi(State&, Word);
|
|
|
|
/**
|
|
* Executes the given CoreWord execution token using the given state.
|
|
*/
|
|
static void run(unsigned int, State&);
|
|
|
|
constexpr static char wordsarr[] =
|
|
"_lit\0drop\0dup\0swap\0pick\0sys\0"
|
|
"+\0-\0m*\0_/\0_%\0"
|
|
"_@\0_!\0>r\0r>\0=\0"
|
|
"<\0&\0|\0^\0"
|
|
"<<\0>>\0:\0_'\0execute\0"
|
|
"exit\0;\0_jmp0\0_jmp\0"
|
|
"depth\0_rdepth\0_in\0_ev\0find\0"
|
|
"um*\0";
|
|
};
|
|
|
|
#endif // ALEEFORTH_COREWORDS_HPP
|
|
|