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authorClyne Sullivan <clyne@bitgloo.com>2023-03-08 19:57:26 -0500
committerClyne Sullivan <clyne@bitgloo.com>2023-03-08 19:57:26 -0500
commitdcd5e792b1d84afd1bea9780781674b6e6ad8dc3 (patch)
tree6b841cd741c3d8df6cb7b22f1423a5c814e0add9 /dictionary.hpp
parent1960aa8773e51a76f0a5a653c8a4eb4fbef5e4ba (diff)
move libalee into folder
Diffstat (limited to 'dictionary.hpp')
-rw-r--r--dictionary.hpp79
1 files changed, 0 insertions, 79 deletions
diff --git a/dictionary.hpp b/dictionary.hpp
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-/**
- * 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_DICTIONARY_HPP
-#define ALEEFORTH_DICTIONARY_HPP
-
-#include "types.hpp"
-
-#include <cstddef>
-#include <cstdint>
-
-/**
- * Dictionary entry format:
- * - 1 information byte
- * bits 0..4: Length of name (L)
- * bit 5: Immediate?
- * bits 6..15: Distance to next entry (negative)
- * - L bytes of name
- * - 0+ bytes for address alignment
- * - 0+ bytes of entry's data...
- */
-
-class Dictionary
-{
-public:
- constexpr static Addr Base = 0;
- constexpr static Addr Here = sizeof(Cell);
- constexpr static Addr Latest = sizeof(Cell) * 2;
- constexpr static Addr Compiling = sizeof(Cell) * 3;
- constexpr static Addr Source = sizeof(Cell) * 4;
- constexpr static Addr SourceLen = sizeof(Cell) * 5;
- constexpr static Addr Input = sizeof(Cell) * 6; // len data...
- constexpr static Addr InputCells = 80; // bytes!
- constexpr static Addr Begin = sizeof(Cell) * 7 + InputCells;
-
- void initialize();
-
- Addr here() const noexcept { return read(Here); }
- void here(Addr l) noexcept { write(Here, l); }
-
- Addr latest() const noexcept { return read(Latest); }
- void latest(Addr l) noexcept { write(Latest, l); }
-
- virtual Cell read(Addr) const noexcept = 0;
- virtual void write(Addr, Cell) noexcept = 0;
- virtual uint8_t readbyte(Addr) const noexcept = 0;
- virtual void writebyte(Addr, uint8_t) noexcept = 0;
-
- Addr alignhere() noexcept;
- Addr aligned(Addr) const noexcept;
- Addr allot(Cell) noexcept;
- void add(Cell) noexcept;
- void addDefinition(Word) noexcept;
-
- Addr find(Word) noexcept;
- Addr getexec(Addr) noexcept;
- Word input() noexcept;
-
- bool equal(Word, const char *, unsigned) const noexcept;
- bool equal(Word, Word) const noexcept;
-};
-
-#endif // ALEEFORTH_DICTIONARY_HPP
-