1 files changed, 88 insertions, 0 deletions
diff --git a/corewords.hpp b/corewords.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_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 = 30;  // size
+    constexpr static std::size_t HiddenWordLiteral = 30; // index
+    constexpr static std::size_t HiddenWordJump = 31;    // index
+    constexpr static std::size_t WordCount = 32;         // size
+
+    constexpr static Cell Immediate = (1 << 5);
+
+    static int findi(std::string_view str);
+    static Func find(std::string_view str);
+    static void run(int i, State& 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"
+	";\0here\0exit\0imm\0const\0";
+    // lit, jmp, jmp0, ', lits
+
+    static Func get(int index);
+
+    static int op_drop(State& state);
+    static int op_dup(State& state);
+    static int op_swap(State& state);
+    static int op_pick(State& state);
+    static int op_sys(State& state);
+    static int op_add(State& state);
+    static int op_sub(State& state);
+    static int op_mul(State& state);
+    static int op_div(State& state);
+    static int op_mod(State& state);
+    static int op_peek(State& state);
+    static int op_poke(State& state);
+    static int op_rot(State& state);
+    static int op_pushr(State& state);
+    static int op_popr(State& state);
+    static int op_eq(State& state);
+    static int op_lt(State& state);
+    static int op_allot(State& state);
+    static int op_and(State& state);
+    static int op_or(State& state);
+    static int op_xor(State& state);
+    static int op_shl(State& state);
+    static int op_shr(State& state);
+    static int op_comment(State& state);
+    static int op_colon(State& state);
+    static int op_semic(State& state);
+    static int op_here(State& state);
+    static int op_exit(State& state);
+    static int op_imm(State& state);
+    static int op_const(State& state);
+    static int op_literal(State& state);
+    static int op_jump(State& state);
+};
+
+#endif // ALEEFORTH_COREWORDS_HPP
+